- Aug 2024
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stackoverflow.com stackoverflow.com
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The perfect index for the above query would be a multi-column index spanning all three columns in matching sequence and with matching sort order:
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- Jun 2024
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www.youtube.com www.youtube.com
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04:00 Allen compares GTD to F1, here. Funnily enough, the most productive people are the ones that get most into GTD. Similarly, the fastest people, in F1, want to get even faster, "by reducing drag in the system".
Interestingly, DRS can thus be used in other contexts, like productivity. "How can you open your flap, and reduce drag, like F1 cars do?"
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- May 2024
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j'ai fait plusieurs travaux sur ces questionsl et ce slide en résume un rapport de 150 pages 00:19:33 sur que font les systèm éducatif qui appartenaient au cadrant en haut à droite que je vous ai montré au début donc ces systèmes éducatifs dit meilleur qui sont à la fois performants et équitables on est allé regarder ce 00:19:45 qu'ils font avec leur profession enseignante qu'est-ce qu'ils font de leurs enseignants quelle politique pour viser les enseignants et bien il y a une variété d'approches très importantes mais on a trouvé trois éléments communs 00:19:57 on a on a trouvé que c'est dans ces pays-là les enseignants avaient une expérience pratique longue obligatoire pendant leur formation initiale donc ils sont face à une salle de classe dès leur 00:20:10 formation initiale avec un tuteur et ils progressent et cette expérience pratique est longue et j'insiste là-dessus c'est pas l'histoire de faire 3 semaines un mois et cetera en sal de classe euh je pense que oui c'est au 00:20:24 minimum un semestre alors là aussi il y a des variétés mais oui minimum un semestre 1 an idéalement peut-être 2 ans oui j'ai plus les détails en tête euh aussi les enseignants peuvent suivre 00:20:38 des formations continues qui répondent à leurs besoins donc pas des formations continues qui sont proposées voilà sur le plan national mais qui viennent répondre aux besoins d'un établissement en particulier l'établissement dans lesquel il se trouve et dernier point 00:20:52 les mécanismes d'évaluation des enseignants sont reliés à la formation continue et à ce qui leur est proposé en terme de formation continue on fait le lien entre ben voilà on a vu des vous pouvez vous améliorer dans tel domaine 00:21:03 on va vous prer proposer une formation continue qui répond à ce besoin
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docdrop.org docdrop.org
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on est tous et 01:02:17 toutes dans une anxiété de performance et dans une anxiété de compétition sociale euh et donc bah ça voilà ça c'est la seule façon d'y arriver c'est de vraiment ne pas se soucier de ce de 01:02:31 cette compétition mais mais ça veut dire qu'on va jamais nous organiser pour changer les choses donc d'où le danger de développement personnel alors du coup non parce que plus on plus on plus 01:02:46 on va bien et moins on veut s'organiser c'est c'est voilà plus on est en colère c'est un peu aussi que c'est les gens passer un militant sont en colère mais justement parce que c'est un peu important de de garder cette émotion pour s'organiser
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livejaverianaedu-my.sharepoint.com livejaverianaedu-my.sharepoint.comOneDrive1
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La performance de testimonios como forma potencial de resistencia (narrativa digital) puede ofrecer una manera de expresar y también atestiguar cómo los derechos humanos son negados tras la detención y deportación de inmigrantes.
En este tipo de performance, los individuos pueden compartir sus experiencias de primera mano, narrando los detalles de su situación, las condiciones en las que son detenidos y los abusos que enfrentan durante el proceso de deportación. Al hacerlo, no solo están expresando su propia voz y resistencia, sino que también están arrojando luz sobre las prácticas sistemáticas injustas y violatorias de derechos.
La narrativa digital amplifica aún más el impacto de estos testimonios al permitir que se compartan a través de plataformas en línea, alcanzando audiencias más amplias y facilitando la solidaridad y el apoyo de comunidades globales. Además, el uso de diferentes medios digitales, como videos, fotos, textos y redes sociales, enriquece la experiencia narrativa y hace que sea más convincente y accesible para aquellos que buscan comprender y abogar por un cambio.
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Local file Local file
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Aunque Brysk (2013) se pregunta si las redes sociales puedenser utilizadas como una herramienta performativa (o como unamáscara) para reclamar derechos –ya que estas pueden generaruna respuesta emocional, aun cuando ese momento de cuidadopuede evaporarse rápidamente sin tener un efecto duradero–,propongo que la performance de ser persona –en su carácter de más-cara que permite reclamar derechos– no es el único acto de hablaa través del cual afirmar la propia humanidad.
Debemos considerar tanto las limitaciones como las posibilidades de las redes sociales en la afirmación de nuestra humanidad. No debemos depender únicamente de la “performance” en línea; hay múltiples formas de expresar nuestra existencia y lucha. La afirmación clave. La “performance de ser persona” se refiere a cómo nos presentamos en línea para reclamar derechos y reconocimiento. Sin embargo, hay otros actos de habla que también afirman nuestra humanidad, como la resistencia, la solidaridad y la narración de experiencias. Brysk plantea una pregunta interesante. Las redes sociales pueden ser una plataforma para expresar nuestras identidades y luchas, pero también pueden convertirse en una “máscara” detrás de la cual ocultamos nuestra verdadera realidad. Las redes sociales pueden generar respuestas emocionales inmediatas, pero estas pueden desvanecerse rápidamente. A veces, la atención momentánea no se traduce en cambios duraderos.
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- Mar 2024
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calnewport.com calnewport.com
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Practice, learning, getting better at what you do is hard work and not “fun” or “flow”. “Flow” is for performance, rather than practice, for when you’re on stage, rather than in the rehearsal studio.
Comment: Flow as being performance rather than practice
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softwareengineering.stackexchange.com softwareengineering.stackexchange.com
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Don't worry about performance too early though - it's more important to get the design right, and "right" in this case means using the database the way a database is meant to be used, as a transactional system.
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The only issue left to tackle is the performance issue. In many cases it actually turns out to be a non-issue because of the clustered index on AgreementStatus (AgreementId, EffectiveDate) - there's very little I/O seeking going on there. But if it is ever an issue, there are ways to solve that, using triggers, indexed/materialized views, application-level events, etc.
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- Jan 2024
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www.youtube.com www.youtube.com
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climate change performance index
for - resource - climate change performance index - how well a city is adapted to the climate crisis
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www.derstandard.de www.derstandard.de
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Überblicksartikel über klimapolitische Fort- und Rückschritte 2023, besonders zu Großbritannien, Schweden, den Niederlanden und China. Ausführlich wird auf Maßnahmen der britischen und schwedischen Regierung eingegangen, die die bisherige konsequente Klimapolitik deutlich verwässern. https://www.derstandard.de/story/3000000188940/war-2023-ein-jahr-der-klimapolitischen-rueckschritte
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- Dec 2023
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tonybaloney.github.io tonybaloney.github.io
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The next point when using a parallel execution model like multiprocessing or sub interpreters is how you share data.
Once you get over the hurdle of starting one, this quickly becomes the most important point. You have two questions to answer:
- How do we communicate between workers?
- How do we manage the state of workers?
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www.tandfonline.com www.tandfonline.com
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Interpreting accuracy is one of the most commonly used indicators of cognitive demands in experimental interpreting studies. One possibility to assess interpreting performance is to analyse interpreting accuracy based on meaning units. The methodological approaches used thus far, however, have some drawbacks: (a) they are limited to an assessment of sense consistency with no indication of the logical cohesion of the rendition, (b) they do not take into account the difference between unintended and strategic omissions or, more generally, the prioritization of source speech information as an interpreting strategy, and (c) they do not allow for the observation of fluctuations of cognitive load or effects of fatigue. In this article, we will present a refined approach to unit-based accuracy analysis that may contribute to solving the issues mentioned above.
This piques my interest, especially (b).
口譯訊息的遺漏:刻意(運用口譯策略),還是無心(因爲無力)?
源語訊息的權重:每個meaning unit肯定有不同權重,而且權重的認定很主觀。
整個語篇論述的語意連貫、邏輯銜接、承轉(cohesion),也是一大挑戰,如何判定?銜接詞是否僅是一個語義單位,給予某一權重,還是自成一格,必須另外設計評量方式?
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tracydurnell.com tracydurnell.com
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While social media emphasizes the show-off stuff — the vacation in Puerto Vallarta, the full kitchen remodel, the night out on the town — on blogs it still seems that people are sharing more than signalling.
Social media as performance, blogs as voice. Especially over longer periods of time, blogs become a qualitatively different thing, where the social media timelines remain the same. Vgl [[Blogs als avatar 20030731084659]] https://www.zylstra.org/blog/2020/08/your-blog-is-your-avatar/ Personal relationships are the stuff of our lives.
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- Nov 2023
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en.itpedia.nl en.itpedia.nl
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All about Caching: Strategies, Challenges and Optimization
Caching is a crucial technique in modern #webservices, helping to improve #performance, reduce #latency, and minimize the load on servers and networks. The principle is simple: storing copies of data in a more quickly accessible location to enable faster access to that data. But, as with many technologies, the devil is in the details. In fact, creating a good configuration is very difficult and the smallest mistake can be very detrimental to the performance of our #website.
caching
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A more efficient but more complicated way to simulate perfect guessing is to guess both options simultaneously
NB: Russ talking here about flattening the NFA into a DFA that has enough synthesized states to represent e.g. in either state A or state B. He's not talking about CPU-level concurrency. But what if he were?
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- Sep 2023
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blog.pnkfx.org blog.pnkfx.org
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TurboWish is a framework for profiling Rust programs, focused on illuminating the performance and resource usage of task-oriented code written with async/await.
TurboWish是一个用于分析Rust程序的框架,专注于揭示使用async/await编写的面向任务的代码的性能和资源使用情况。
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- Aug 2023
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ajv.js.org ajv.js.org
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Serializing the data with a function specialized to your data shape can be more than 10x compared with JSON.stringify.
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Ten minutes before sleep, do the following: PRAY
It's a combination of visualization, commitment, and meditation
Request the subconscious through this act of prayer.
Also visualize the outcome and process of that which you aspire to do the following day, and even that which you want to achieve the following month(s). Thus, visualize the following: Big Picture, Milestones, and yourself the next day.
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In the morning, process your subconscious state by instead of immediately inputting, you start outputting!
This can be done through journaling.
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Put the phone on airplane mode (in addition to blocking blue light) before sleep, for quite some time before sleep, in order to avoid (over)stimulation and the creation of dopamine which negatively impacts (falling a)sleep
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What is done right before and right after sleep sets the stage for literally everything.
How you do anything is how you do everything.
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www.youtube.com www.youtube.com
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Ideally in the evening, before sleep, do some activity or activities that turn off the mind. You want to relax and stop thinking so much.
Interestingly enough, forgiveness, or the act of forgiving makes relaxing easy. So, if you have someone, or even yourself, to forgive... Do this right before going to sleep :)
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Apparently, cold shower for roughly 3-4 minutes (rather than a hot shower) before sleep are helpful for sleep, as it decreases the core body temperature.
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When you wake up, get sunlight in. Andrew Huberman also advocates for that. It tells the brain and body to wake up. It creates cortisol.
Can be combined with movement/exercise as well which also increases sleep quality. (Movement should not to be too late, however.)
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www.youtube.com www.youtube.com
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Consistency is key when it comes to sleep.
Always go to bed at the same time and wake up at the same time.
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www.youtube.com www.youtube.com
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Apparently, some Magnesiums can help with deep sleep.
Author takes 400mg.
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It is important to block blue light in the evening. Blue light sends signals to your body to be awake.
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One of the things to optimize sleep is to take care of meal timing. Author eats: - Breakfast at 8 - Lunch at noon (12) - Dinner between 5 and 6.30
Discipline and consistency is important here.
Essential is to eat dinner 3+ hours before you go to sleep.
Food increases core body temperature which negatively impacts sleep.
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www.youtube.com www.youtube.comYouTube1
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Sleep is the absolute foundation for top-performance.
Measure it. Track it. Optimize it.
After that, results WILL go into the sky.
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samplereality.com samplereality.com
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In 1999 Lisa Samuels and Jerry McGann published an essay about the power of what they call “deformance.” This is a portmanteau that combines the words performance and deform into an interpretative concept premised upon deliberately misreading a text, for example, reading a poem backwards line-by-line.
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- Jul 2023
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log.schemescape.com log.schemescape.com
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I tried precompiling the JavaScript code to QuickJS bytecode (to avoid parsing overhead), but that only saved about 40 milliseconds (I guess parsing is really fast!).
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bwl-website.s3-website.us-east-2.amazonaws.com bwl-website.s3-website.us-east-2.amazonaws.com
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a factor of 10 did go into faster responses to the user’s actions
We've seen the opposite trend in the last 10 years or so.
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Local file Local file
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only a small fraction of the features of each component, and your program con-sumes 10 or 100 times the hardware resources of a fully custom program, butyou write 10% or 1% of the code you would have written 30 years ago.
You use only a small fraction of the features of each component, and your program consumes 10 or 100 times the hardware resources of a fully custom program, but you write 10% or 1% of the code you would have written 30 years ago.
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www.youtube.com www.youtube.com
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- Caffeine as backbone of civilization
- caffeine archetype ( I am the mindful master)
- high correlation between flow & caffeine
- associate caffeine with flow (I also do this with flow music)
- shortcut struggle phase with caffeine
- caffeine timing (1 to 1.5 hours until waking & 10 hours before sleep no caffeine)
- proper dosage (test what works) 4.1 higher dosage when lack of sleep
- what caffeine synergizes most (for me, probably coffee, in particular espresso) 5.1 double water intake when drinking caffeine (I always try to do this) 6 keep caffeine sensitivity high (1 day per week off, 1 week per quarter off)
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- Jun 2023
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www.youtube.com www.youtube.com
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Huberman states that doing these 4 things consistently and regularly, as a habit, might seem to take time, therefore decreasing performance. BUT, in reality they increase performance, as these things improve your health, focus, and awareness significantly.
Therefore they are so-called Performance Enablers
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The 4 (behavioral) keypoints for great physical and mental as well as cognitive health:
One) (2:00-4:05) View sunlight early in the day. The light needs to reach the eyes--increasing alertness, mood, and focus, through certain receptors. Also increases sleep quality at night, according to Huberman. Ideally five to ten minutes on a clear day, and ten to twenty minutes on an overcast day. No sunglasses, and certainly not through windows and windshields. If no sun is out yet, use artificial bright light. Do this daily.
Two) (4:05-6:10) Do physical exercise each and every day. Doesn't have to be super intense. Huberman recommends zone two cardiovascular exercise. Walking very fast, running, cycling, rowing, swimming are examples. He says to get at least between 150 and 200 minutes of this exercise per week. Some resistance training as well for longevity and wellbeing, increases metabolism as well. Do this at least every other day, according to Huberman. Huberman alternates each day between cardiovascular exercise and resistance training.
Three) (6:20-9:10) People should have access to a rapid de-stress protocol or tools. This should be able to do quickly and instantly, without friction. You can just do one breath for destress. ( Deep long breath through nose, one quick breath in nose to completely fill the longs, and then breathe out through mouth long.)
Four) (9:12-14:00) To have a deliberate rewiring nervous system protocol to use. A thing that can be done is NSDR (Non-Sleep Deep Rest protocol), this is specifically to increase energy.
Ideally the NSDR should be done after each learning session as well to imitate deep sleep (REM) and therefore accelerate neuroplasticity and thus rewire the nervous system; increasing the strength of connections between neurons and therefore increase retention significantly.
NSDR is also a process of autonomity and control, it allows one to find that they are in control of their body and brain. It makes one realize that external factors don't necessarily have influence. According to Huberman, NSDR even replenishes dopamine when it is depleted, making it also suitable for increasing motivation.
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docdrop.org docdrop.org
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The musical depiction of the lyrics from Figure 9.2 illustrates an additional aspect of bluesperformance practice—the use of call and response. Originally practiced by a large groupof people, this improvisational technique involves sharing ideas between the leader andher/his followers. Mastering the call and response technique is especially important at thebeginning of our encounter with jazz improvisation. It engages us in a meaningfuldialogue that includes exchanging and communicating musical ideas. The communicativeaspect of call and response is relatively straightforward in the context of verbal conversation.
In a musical setting, however, when spoken words and sentences are replaced with motifs and melodic phrases, the structure of the call and response might not be as obvious. To be a good communicator, we have to know how to listen, pay close attention to what the other musicians are playing, and try to be receptive to their ideas. In certain scenarios, however, the use of call and response technique might create less than desirable effects. For instance, when the call and response takes the form of exact and immediate repetition, it might be impressive but not necessarily in keeping with the surrounding musical context. A much more subtle way of thinking about the call and response technique involves musical interaction at the level of the entire performance in which non-adjacent sections relate to one another, and where the flow of the performance is regulated by logically introduced musical ideas. In creating a musical narrative, then, we can also respond to each other’s playing, but these responses are not as obvious as simple repetitions tend to be. We can demonstrate our listening skills, for instance, by incorporating an idea that we have previously heard (i.e. a rhythmic motive from the drummer, or a melodic gesture from the guitarist) and develop it in such a way that leads to a more satisfying musical discourse. The call and response aspect of improvisation means that musicians understand each other’s intentions, have an unspoken agreement, so to speak, and project them with a high level of personal expression and musical commitmen
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docdrop.org docdrop.org
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NOTATION OF JAZZ STYLE, SWING RHYTHM, AND PERFORMANCE
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- May 2023
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www.doi.org www.doi.org
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In addition, data model policy requires that RAs maintain a record of the date of allocation of a DOI name, and the identity of the registrant on whose behalf the DOI name was allocated.
{Record-keeping}
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The policy provides a simple test of an RA’s competence: the ability to make a DOI Kernel Declaration, which requires that the RA has an internal system which can support the unambiguous allocation of a DOI name, and is fundamentally sound enough to support interoperability within the network.
{Competence} {Unambiguous Allocation}
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The second aim of DOI data model policy is “to ensure minimum standards of quality of administration of DOI names by Registration Agencies, and facilitate the administration of the DOI system as a whole”.
{Administrative Capacity}
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www.doi.org www.doi.org
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Designing and implementing specific operational processes for e.g. quality control of input data and output data; Integrating the community into other DOI related activities and services.
{Quality Assurance}
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Providing applications, services, marketing, outreach, business cases etc. to introduce the DOI system to the community; Designing and implementing specific operational processes for e.g. quality control of input data and output data;
{Services}
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Providing information and advice to the community
{Community Advice}
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www.doi.org www.doi.org
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More sophisticated functionality available, e.g., multiple resolution, data typing
{Data Typing} {Multiple Resolution}
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- Apr 2023
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bugs.ruby-lang.org bugs.ruby-lang.org
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why not allow block forwarding without capturing: foo(&) foo(1, 2, &)
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This is an American form,and it sent me straight into the arms of Thomas Jefferson at Monticello. And
Sets the historical context of Hamilton's work.
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chambermagic.com chambermagic.com
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Immediately before stepping on stage, he suggests using the tip of your right pinky finger to find the upper end of your trousers zipper. If your fingernail clicks against the zipper’s metal pull-tab, then you are safe and ready to make your entrance. If your pinky slides in up to your knuckle, however, then you have to XYZ PDQ (eXamine Your Zipper, Pretty Darn Quick)!
Harry Lorayne used a pinky check, in which he used the fingernail of his pinky finger against his the pull-tab of his zipper to ensure his fly was closed, every night before appearing on stage to prevent embarrassment and to maintain credibility as a memory expert.
MAGIC MENTOR MONDAY: Harry Lorayne - Chamber Magic<br /> by Steve Cohen
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- Mar 2023
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biblioracle.substack.com biblioracle.substack.com
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If we assume students want to learn - and I do - we should show our interest in their learning, rather than their performance.
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- Feb 2023
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blog.appsignal.com blog.appsignal.com
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The majority of real-world software benefits from the fast warm-up and performance enhancements provided by the YJIT basic block versioning JIT compiler.
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- Jan 2023
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bugs.ruby-lang.org bugs.ruby-lang.org
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I'm still against frozen-string-literal by default. It is arguable if the string creation limits performance so much in real-world programs. We need to first measure how much Ruby can be faster by frozen-string-literal. If it is not significant, Ruby should prefer dynamics and flexibility.
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Because endpoints are URLs, you can – and should – monitor them to ensure they stay online. When talking about online services and websites, you’ll often hear the word “uptime”. This is the percentage of time your application stays up – in other words, the percentage of time your app is accessible and functioning. Outages and performance errors will lower your overall percentage.Monitoring your endpoints also gives you metrics on which endpoints are being accessed and what types of API calls developers are making. This can help you track user behavior, and gain insight into which endpoints are highly trafficked so you can maintain your performance.
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- Dec 2022
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dercuano.github.io dercuano.github.io
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If you write an algorithm in a straightforward way in Node, you can expect it to run about as fast as if you write it in a vectorized way using Numpy, or twenty times as fast as if you write it in a straightforward way in CPython.
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- Nov 2022
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current JavaScript tools could be faster than they are today
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www.cisco.com www.cisco.com
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Scaffolding is the act of providing learners with assistance or support to perform a taskbeyond their own reach if pursued independently when “unassisted.”
Wood, Bruner, & Ross (1976) define scaffolding as what? (Metiri Group, Cisco Sytems, 2008) The act of providing learners with assistance or support to perform a task beyond their own reach if pursued independently when "unassisted."
What term do Wood, Bruner, & Ross (1976) define as "The act of providing learners with assistance or support to perform a task beyond their own reach if pursued independently when 'unassisted.'"? (Metiri Group, Cisco Sytems, 2008) Scaffolding
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www.hughrundle.net www.hughrundle.net
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It's not entirely the Twitter people's fault. They've been taught to behave in certain ways. To chase likes and retweets/boosts. To promote themselves. To perform.
Twitter trains users to behave a certain way. It rewards a specific type of performance. In contrast, until now at least, M is focused on conversation (and the functionality of the apps reinforce that, with how boosts and likes work differently)
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www.researchgate.net www.researchgate.net
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Google Scholar is needed to access annotations in context "Listen to the noise: noise is beneficial for cognitive performance in ADHD"
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The most intriguing result in the present study is thepositive effect of white noise on performance for theADHD children. This noise effect was present in boththe non-medicated and medicated children. Thissupports the MBA (Moderate Brain Arousal) model(Sikstro ̈m & So ̈derlund, 2007), suggesting that theendogenous (neural) noise level in children withADHD is sub-optimal. MBA accounts for the noise-enhancing phenomenon by stochastic resonance(SR). The model suggests that noise in the environ-ment introduces internal noise into the neural sys-tem through the perceptual system. Of particularimportance, the MBA model suggests that the peakof the SR curve depends on the dopamine level, sothat participants with low dopamine levels (ADHD)require more noise for optimal cognitive performancecompared to controls.
Author's self-described "most intriguing result"
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It has long been known that cognitive processing iseasily disturbed by noise and other distractors(Broadbent, 1958).
Known for who? General populations? Specific subpopulations?
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The MBAmodel predicts that noise enhances memory perfor-mance for ADHD and attenuates performance forcontrols. We will also argue for a link between theeffects of noise, dopamine regulation, and cognitiveperformance.
Prediction of Moderate Brain Arousal model and author's additional argument.
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Results: Noise exerted a positive effect on cognitive performance forthe ADHD group and deteriorated performance for the control group, indicating that ADHD subjectsneed more noise than controls for optimal cognitive performance
Explains why studies on music at general population have conflicting results (ie, general decrease in capacity to focus with noisy environment). Wonder if this relates to atonal or discordant and dissonant music (free jazz, avant-guarde, etc) or polyrhythmic and odd metered time signatures
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fitzgeraldnick.com fitzgeraldnick.com
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Rust lets us explicitly state our desires to the compiler
This is the key. It follows that the same results, then, could be seen if we devised a way to communicate the same desires to the machine when we're dealing with JS. (My preferred thought experiment: imagine a
docs/
directory in the repo where these sorts of things are documented for the benefit of other programmers—alongside any other rationale that you would naturally hope to communicate as well—and that the computer itself were made to be able to read and act upon the very same documentation to guide its behavior.) See http://cr.yp.to/qhasm/literature.html
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- Sep 2022
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www.instagram.com www.instagram.com
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A importância do adutor de absorver a força e estabilizar o quadril durante ações de mudança de direção
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www.instagram.com www.instagram.com
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A falta de uma carga excêntrica além do desafio da posição, podem permitir um bom nível de transferência desse tipo de exercício para a performance na aceleração
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twitter.com twitter.comTwitter1
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Drill para fazer nos treinos de futebol americano
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stackoverflow.com stackoverflow.com
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That is called profiling, not performance testing. Performance testing should ensure that a piece of code runs within a desired amount of time, given a certain context, before the new code goes into production.
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- Aug 2022
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www.theatlantic.com www.theatlantic.com
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Gutman, R. (2021, October 28). Is Moderna Really Better Than Pfizer—Or Is It Just a Higher Dose? The Atlantic. https://www.theatlantic.com/health/archive/2021/10/pfizer-moderna-dose-which-vaccine-best/620501/
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blog.dshr.org blog.dshr.org
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The lack of CPU power in those days also meant there was deep skepticism about the performance of interpreters in general, and in the user interface in particular. Mention "interpreted language" and what sprung to mind was BASIC or UCSD Pascal, neither regarded as fast.
still widely held today
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graceful.dev graceful.dev
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free course
observability = monitoring?
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www.software.ac.uk www.software.ac.uk
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The more I think about it, the less I think there is a meaningful definition of the one true run time. I have put significant effort into making sure that runtimes are consistent but, however we do this, it makes our experiments less realistic. With rare exceptions (perhaps some safety critical systems) our algorithms will not be used in highly controlled situations, moderated to reduce variability between runs or to maximise speed of this particular process. Algorithms will be run as part of a larger system, in a computer sometimes with many other processes and sometimes with few and, because of the way that computing has developed, sometimes in raw silicon and sometimes in virtual machines. So the more I think about it, the more I think that what matters is the distribution of run times. For this, your experiment on your hardware is important, but so are future recomputations on a wide variety of VMs running on a variety of different hardware.
The truth of this has consequences not just for the metaissue of recomputation, but the entire raison d'etre of doing performance studies to begin with.
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If I can’t run your experiment at all, then I can’t reproduce your times.
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news.ycombinator.com news.ycombinator.com
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This is what I observed in hyper productive people: some of them have a unique, novel system of organizing their knowledge, but many of them don't. So, having such a system is probably not that important.
I see these sorts of statements often, and never taken into account is the diversity of ways of thought, general intelligence, quality of memory, or many other factors that make individuals different as well as their outcomes different.
Different people are going to use different tools differently and have different outcomes.
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- Jul 2022
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www.vpri.org www.vpri.org
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Another key idea here is to separate meaning from tactics. E.g. the meaning of sorting is much simpler and more compact than the dozens of most useful sorting algorithms, each one of which uses different strategies and tactics to achieve the same goal. If the “meanings” of a program could be given in a way that the system could run them as programs, then a very large part of the difficulties of program design would be solved in a very compact fashion. The resulting “meaning code” would constitute a debuggable, runnable specification that allows practical testing. If we can then annotate the meanings with optimizations and keep them separate, then we have also created a much more controllable practical system.
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- Jun 2022
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www.facultyfocus.com www.facultyfocus.com
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there is clear evidence that explicitly teaching reading strategies to students improves their overall academic performance, such instruction is often limited to developmental reading or study skills courses (Saxby 2017, 37-38).
Teaching reading strategies to students improves their overall academic performance, but this instruction is often limited to developmental reading or study skills courses.
ref: Saxby, Lori Eggers. “Efficacy of a College Reading Strategy Course: Comparative Study.” Journal of Developmental Education 40, no. 3 (2017): 36-38.
Using Hypothes.is as a tool in a variety of courses can help to teach reading strategies and thereby improve students' overall academic performance.
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- May 2022
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news.ycombinator.com news.ycombinator.com
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Cold starts depend a lot on what people actually deploy. They're really fast for an optimized Go binary, really slow for most Node apps.
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URL
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geothermal-energy-journal.springeropen.com geothermal-energy-journal.springeropen.com
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therefore the gases should be removed from the condenser. This can be achieved byinstalling vacuum pumps, compressors, or steam ejectors. The condenser heat removalis done either by using a cooling tower or through cold air circulation in the condenser.The condensate forms a small fraction of the cooling water circuit, a large portion ofwhich is then evaporated and dispersed into the atmosphere by the cooling tower. Thecooling water surplus (blow down) is disposed of in shallow injection wells. In singleflash condensation system, the condensate does have direct contact with the coolingwater.
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Single flash power plants are classified according to their steam turbines types, i.e., theturbine exit conditions. Two such basic types are the single flash with a condensationsystem and the single flash back pressure system. In the first type, a condenser oper-ating at very low pressure is used to condensate the steam leaving the steam turbine.The condenser should operate at low vacuum pressure to maintain a large enthalpy dif-ference across the expansion process of the steam turbine, hence resulting in a higherpower output. The geothermal fluid usually contains non-condensable gases which arecollected at the condenser. Such a collection of gases may raise the condenser pressure,
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stackoverflow.com stackoverflow.com
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Some people have expressed surprise end even doubt that it could be faster to read the files twice than reading them just once. Perhaps I didn't manage to explain very clearly what I was doing. I am talking about cache pre-loading, in order to have the files in disk cache when later accessing them in a way that would be slow to do on the physical disk drive. Here is a web page where I have tried to explain more in detail, with pictures, C code and measurements.
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Remember the caching. Reading two files sequentially into memory from the physical disk can be faster than reading them both in parallel, alternating between them (moving the read head back and forth). Everything you do later, with all the data cached in memory, is relatively much faster. But yes, it depends on the data, and this is an average. Two files that actually do differ in the beginning will be faster to compare byte by byte.
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- Apr 2022
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twitter.com twitter.com
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(7) ReconfigBehSci on Twitter: “@ToddHorowitz3 probably- and I think there are many interesting questions around why he is there and whether he should be there. But to answer those properly, looking at the performance of the model seems important and interesting to me- that is all I am saying” / Twitter. (n.d.). Retrieved March 6, 2021, from https://twitter.com/SciBeh/status/1324389147050569734
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dl.acm.org dl.acm.org
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The law of the "Wild West of Programming" was still held in too high esteem! The same inertia that kept many assembly code programmers from ad- vancing to use FORTRAN is now the principal obstacle against moving from a "FORTRAN style" to a structured style.
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The amount of resistance and prejudices which the farsighted originators of FORTRAN had to overcome to !gMn acceptance of their product is a memorable indication of the degree to which programmers were pre- occupied with efficiency, and to which trick- ology had already become an addiction
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gist.github.com gist.github.com
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it's minified before encoding the link (with encoding) is only 224 characters, instead of 337
Not even close to the dumbest thing I've ever read, but still very, very dumb.
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- Mar 2022
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www.medrxiv.org www.medrxiv.org
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Blachere, F. M., Lemons, A. R., Coyle, J. P., Derk, R. C., Lindsley, W. G., Beezhold, D. H., Woodfork, K., Duling, M. G., Boutin, B., Boots, T., Harris, J. R., Nurkiewicz, T., & Noti, J. D. (2021). Face mask fit modifications that improve source control performance (p. 2021.09.16.21263642). medRxiv. https://doi.org/10.1101/2021.09.16.21263642
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news.ycombinator.com news.ycombinator.com
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I just dislike how non-native it feels and looks.
I suspect VS Code's non-native look has actually contributed to the uptake from a subset of its users. A fullscreen terminal-based editor like Vim is also non-native as far as widget sets are concerned, but pleasantly so in at least one respect. When Chrome was released, when you asked people what they liked about it, sure they'd say it was fast and whatnot, but for a non-trivial segment of the world, they just liked how visually slim it was. They appreciated how little chrome was actually in Chrome. VS Code managed to reap dividends on its imports of the same approach to its "shell", even while not being particularly fast. (People point to VS Code as an example of a snappy Electron app, and they're not wrong insofar as the comparison goes to other typical Electron apps; on an absolute, non-weight-class-adjusted scale, though, VS Code is still pretty clunky—people just ignore it because of how slim it appears in comparison to IDEs like MonoDevelop[1].)
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- Feb 2022
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Local file Local file
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The unified approachhas the advantage, that the enterprise has more control overthe data and quality, and the data querying is significantlyfaster.
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However, federated querying andaccess control over fine-grained datasources drastically impedethe performance.
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tribe-against-machine.org tribe-against-machine.org
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blue women - history of indigo invasive migration
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tribe-against-machine.org tribe-against-machine.org
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Dssc - Solar Grätzelcell
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hff2020.xyz hff2020.xyzhff20201
- Jan 2022
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scattered-thoughts.net scattered-thoughts.netCoding1
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It's typically taken for granted that better performance must require higher complexity. But I've often had the experience that making some component of a system faster allows the system as a whole to be simpler
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scattered-thoughts.net scattered-thoughts.net
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The latest SQLite 3.8.7 alpha version is 50% faster than the 3.7.17 release from 16 months ago. [...] This is 50% faster at the low-level grunt work of moving bits on and off disk and search b-trees. We have achieved this by incorporating hundreds of micro-optimizations. Each micro-optimization might improve the performance by as little as 0.05%. If we get one that improves performance by 0.25%, that is considered a huge win. Each of these optimizations is unmeasurable on a real-world system (we have to use cachegrind to get repeatable run-times) but if you do enough of them, they add up.
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www.teachersgoinggradeless.com www.teachersgoinggradeless.com
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fun, fairness, and challenge
Fun, fairness, and challenge could inform the development of three standards with students that could be used to structure their PE sessions. Ask them how do you measure fun? How do you measure fairness: How do you measrue challenge? If they participate in the development of standards, they will be more interested in using them as a guide to improvement - have more fun, play more fairly, ramp up the challenge.
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My students do not arrive in the gym thinking about how their performance will be evaluated.
If they are focused on improving something - like catching - then they should come with the intention of working on that. PE class is not recess. They should have fun, but if they are not focused on anything other than having fun, then they will not be able to improve in any substantive way and it will be impossible to provide any coaching that might lead to that.
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They will demonstrate the art of the catch. Their art of the catch.
Similar problems in language and writing instruction. Ss want to show off their skills and to experiment and do things their own way. That is fine - accomplished writers do this all the time Shakespeare made up hundreds of words. We are not all Shakespeare though - we can make up words in specific contexts, but in writing instruction, the goal is to master common forms and structures before moving on to display personal creativity, yet, even within common forms, there is room for personal creativity. When assessing in this way, it is important to focus on the standards and what those mean in terms of performance - otherwise, be become bogged down and unable to provide clear, consistent, and actional feedback that can lead to improvement in performance.
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there are thousands of pieces that I miss
All performances are complex, and when coaching, it is impossible to attend to every minute detail. Formative assessment - active coaching - is individualized feedback to improve overall performance. Evaluating that performance, is to focus on the performance as a whole.
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“performance'' because I teach physical education
I think a performance focus in important in a lot of fields because, ultimately, education is about what folks are able to do. Knowledge of things is not useful until it is applied to some problem or task. A performance focus could improve assessment across the board and shift teachers away from merely testing "content".
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www.goedel.io www.goedel.io
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https://www.goedel.io/p/tft-performance-methodology?ck_subscriber_id=1372436421
Set up for some experiments in Obsidian, Roam Research, and Logseq to test performance.
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- Dec 2021
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Edge computing is an emerging new trend in cloud data storage that improves how we access and process data online. Businesses dealing with high-frequency transactions like banks, social media companies, and online gaming operators may benefit from edge computing.
Edge Computing: What It Is and Why It Matters0 https://en.itpedia.nl/2021/12/29/edge-computing-what-it-is-and-why-it-matters/ Edge computing is an emerging new trend in cloud data storage that improves how we access and process data online. Businesses dealing with high-frequency transactions like banks, social media companies, and online gaming operators may benefit from edge computing.
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www.thelancet.com www.thelancet.com
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Ortiz, J. R., & Neuzil, K. M. (2021). The value of vaccine programme impact monitoring during the COVID-19 pandemic. The Lancet, 0(0). https://doi.org/10.1016/S0140-6736(21)02322-9
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- Nov 2021
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www.thisiscolossal.com www.thisiscolossal.com
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A Moving Performance
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- Sep 2021
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www.thelancet.com www.thelancet.com
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Beauté, J., Adlhoch, C., Bundle, N., Melidou, A., & Spiteri, G. (2021). Testing indicators to monitor the COVID-19 pandemic. The Lancet Infectious Diseases, 0(0). https://doi.org/10.1016/S1473-3099(21)00461-8
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- Aug 2021
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stackoverflow.com stackoverflow.com
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This still would not eliminate all delay, but I think this could be faster (no render blocking), and cleaner than having inline scripts scattered all over the parent document.
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blog.isquaredsoftware.com blog.isquaredsoftware.com
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All of these approaches use a comparison technique called "shallow equality". This means checking every individual field in two different objects, and seeing if any of the contents of the objects are a different value. In other words, obj1.a === obj2.a && obj1.b === obj2.b && ......... This is typically a fast process, because === comparisons are very simple for the JS engine to do. So, these three approaches do the equivalent of const shouldRender = !shallowEqual(newProps, prevProps).
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When trying to improve software performance in general, there are two basic approaches: 1) do the same work faster, and 2) do less work. Optimizing React rendering is primarily about doing less work by skipping rendering components when appropriate.
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- Jul 2021
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stackoverflow.com stackoverflow.com
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it's much faster—the stack frame does not have to be carried along the "thrown symbol", and no object is created. Lightweight nonlinear flow control.
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www.washingtonpost.com www.washingtonpost.com
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Why crowded meetings and conference rooms make you so, so tired—The Washington Post. (n.d.). Retrieved July 19, 2021, from https://www.washingtonpost.com/business/2019/06/06/why-crowded-meetings-conference-rooms-make-you-so-so-tired/
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- Jun 2021
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www.migrationencounters.org www.migrationencounters.org
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Anita: So, you said you wanted to start off by singing a song?Billy: Yeah, well I’ll sing a song. [Singing] “Well I guess you wondering where I'd been. I searched to find the love within. In my world only you make me do for love, girl, what I would not do. My friends wonder what is wrong with me, but I'm in a daze." Alright. That's it.
Time in the US, Pastimes, Music, Playing, Favorite
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stackoverflow.com stackoverflow.com
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You can return the record directly from the UPDATE, which is much faster than calling an additional SELECT statement. Use RETURN QUERY and UPDATE with a RETURNING clause.
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- May 2021
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psyarxiv.com psyarxiv.com
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Grahlow, M., Rupp, C., & Derntl, B. (2021). The impact of face masks on emotion recognition performance and perception of threat. PsyArXiv. https://doi.org/10.31234/osf.io/6msz8
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psyarxiv.com psyarxiv.com
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Pelly, D., Daly, M., Delaney, L., & Doyle, O. (2021). Worker well-being before and during the COVID-19 restrictions: A longitudinal study in the UK. PsyArXiv. https://doi.org/10.31234/osf.io/659yd
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- Apr 2021
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docs.rangelandsgateway.org docs.rangelandsgateway.org
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The digestive consequences of forage consumption are determined by plant forage quality and animal digestive and detoxification abilities. This interaction, in turn, affects the nutrients and energy available for animal growth and maintenance.
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observablehq.com observablehq.com
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Shows the effect of the number of samples used. Also, you can see svg vs canvas performance
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www.washingtonpost.com www.washingtonpost.com
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“I’m not a musician. I don’t mean that in a derogatory way. But I mean, I wasted a lot of my life playing instruments, which was foolish,” O’Rourke told the newsletter Tone Glow in an interview published in May 2020. “I have no interest in anything being a vessel for expressing something . . . I always like to say, ‘I do stuff.’ ”
I have no interest in being a vessel for expressing something...
Something fascinating about this perspective.
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- Mar 2021
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trailblazer.to trailblazer.to
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Optimization in this case is nothing crazy, just something I neglected while designing the framework.
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www.planetizen.com www.planetizen.com
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Planetizen - Urban Planning News, Jobs, and Education. ‘Arts Performances Take to the Streets’. Accessed 6 March 2021. https://www.planetizen.com/news/2020/12/111501-arts-performances-take-streets.
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McCabe, Stefan, Leo Torres, Timothy LaRock, Syed Arefinul Haque, Chia-Hung Yang, Harrison Hartle, and Brennan Klein. ‘Netrd: A Library for Network Reconstruction and Graph Distances’. ArXiv:2010.16019 [Physics], 29 October 2020. http://arxiv.org/abs/2010.16019.
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www.t-nation.com www.t-nation.com
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The dynamic maximum strength of the calves is a basic prerequisite for short sprints and should be regarded as a performance reserve.
Importância de treinar as panturrilhas
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github.com github.com
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If a UTF8-encoded Ruby string contains unicode characters, then indexing into that string becomes O(N). This can lead to very bad performance in string_end_with_semicolon?, as it would have to scan through the whole buffer for every single file. This commit fixes it to use UTF32 if there are any non-ascii characters in the files.
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github.com github.com
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What is the point of avoiding the semicolon in concat_javascript_sources
For how detailed and insightful his analysis was -- which didn't elaborate or even touch on his not understanding the reason for adding the semicolon -- it sure appeared like he knew what it was for. Otherwise, the whole issue would/should have been about how he didn't understand that, not on how to keep adding the semicolon but do so in a faster way!
Then again, this comment from 3 months afterwards, indicates he may not think they are even necessary: https://github.com/rails/sprockets/issues/388#issuecomment-252417741
Anyway, just in case he really didn't know, the comment shortly below partly answers the question:
Since the common problem with concatenating JavaScript files is the lack of semicolons, automatically adding one (that, like Sam said, will then be removed by the minifier if it's unnecessary) seems on the surface to be a perfectly fine speed optimization.
This also alludes to the problem: https://github.com/rails/sprockets/issues/388#issuecomment-257312994
But the explicit answer/explanation to this question still remains unspoken: because if you don't add them between concatenated files -- as I discovered just to day -- you will run into this error:
(intermediate value)(...) is not a function at something.source.js:1
, apparently because when it concatenated those 2 files together, it tried to evaluate it as:
({ // other.js })() (function() { // something.js })();
It makes sense that a ; is needed.
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And no need to walk backwards through all these strings which is surprisingly inefficient in Ruby.
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Since the common problem with concatenating JavaScript files is the lack of semicolons, automatically adding one (that, like Sam said, will then be removed by the minifier if it's unnecessary) seems on the surface to be a perfectly fine speed optimization.
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reducing it down to one call significantly speeds up the operation.
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I feel like the walk in string_end_with_semicolon? is unnecessarily expensive when having an extra semicolon doesn't invalidate any JavaScript syntax.
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stackoverflow.com stackoverflow.com
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You could also use the NodeIterator API, but TreeWalker is faster
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All those 'modern' and 'super-modern' querySelectorAll("*") need to process all nodes and do string comparisons on every node.
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the fastest solution because the main workload is done by the Browser Engine NOT the JavaScript Engine
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www.t-nation.com www.t-nation.com
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One of my favorite knee-friendly strength training exercises is the half-squat, half-deadlift.
Indicado para pessoas que não podem realizar flexões acentuadas do joelho.
Também é bastante funcional no mundo esportivo, pois simula por exemplo a quebra que muitos recebedores fazem durante um corte numa rota.
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- Feb 2021
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www.sciencedirect.com www.sciencedirect.com
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Partha, D., & David, P. A. (1994). Toward a new economics of science. Research Policy, 23(5), 487–521. https://doi.org/10.1016/0048-7333(94)01002-1
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www.schneems.com www.schneems.com
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The alternative was to have multiple scripts or stylesheet links on one page, which would trigger multiple HTTP requests. Multiple requests mean multiple connection handshakes for each link “hey, I want some data”, “okay, I have the data”, “alright I heard that you have the data, give it to me” (SYN, ACK, SYNACK). Even once the connection is created there is a feature of TCP called TCP slow start that will throttle the speed of the data being sent at the beginning of a request to a slower speed than the end of the request. All of this means transferring one large request is faster than transferring the same data split up into several smaller requests.
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twitter.com twitter.com
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Chris Herd on Twitter. (2021). Twitter. Retrieved 13 February 2021, from https://twitter.com/chris_herd/status/1359135080753614854
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www.quora.com www.quora.com
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why a company like Facebook invests so much research and engineering into the network performance of things as seemingly trivial as notifications.
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www.bmj.com www.bmj.com
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Baum, F., Freeman, T., Musolino, C., Abramovitz, M., Ceukelaire, W. D., Flavel, J., Friel, S., Giugliani, C., Howden-Chapman, P., Huong, N. T., London, L., McKee, M., Popay, J., Serag, H., & Villar, E. (2021). Explaining covid-19 performance: What factors might predict national responses? BMJ, 372, n91. https://doi.org/10.1136/bmj.n91
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- Jan 2021
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www.nytimes.com www.nytimes.com
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Nearly 10,000 fans watched her 30-minute performance on Pitchfork’s Instagram, for free.
Wow thats a lot! :))
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discourse.ubuntu.com discourse.ubuntu.com
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Just saying “snaps are slow” is not helpful to anyone. Because frankly, they’re not. Some might be, but others aren’t. Using blanket statements which are wildly inaccurate will not help your argument. Bring data to the discussion, not hearsay or hyperbole.
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I don’t find the software slow, I find the startup time for snap packages when the start for the first time on a session slow, but that has been improved, and it’s public that the snapcraft team has been working hard to improve that.
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People think that fighters fight best when they are angry, that singers, actors and musicians perform best when they are high on emotions. This cannot be further from the truth. Studies show that in high-stress situations, we perform when we separate ourselves from our emotions. Like how a cup is only useful when it’s empty, it is only when we empty ourselves that we can become a conduit for our art, transcend our mortal shell, and perform at the highest levels.
Studies show that in high-stress situations people perform better when there is a separation of self and emotions.
We might think that boxers perform better when they're angry but that might not be the case.
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- Dec 2020
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github.com github.com
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it can be difficult or verbose to accomplish some things like animations in React, especially without libraries, and high-performance React animation libraries often bail out of its rendering cycle to manipulate the DOM directly.
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The template language's restrictions compared to JavaScript/JSX-built views are part of Svelte's performance story. It's able to optimize things ahead of time that are impossible with dynamic code because of the constraints. Here's a couple tweets from the author about that
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jamstack.org jamstack.org
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Because Jamstack projects don’t rely on server-side code, they can be distributed instead of living on a single server. Serving directly from a CDN unlocks speeds and performance that can’t be beat. The more of your app you can push to the edge, the better the user experience.
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jamstack.org jamstack.org
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Better PerformanceWhy wait for pages to build on the fly when you can generate them at deploy time? When it comes to minimizing the time to first byte, nothing beats pre-built files served over a CDN.
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- Nov 2020
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forge.medium.com forge.medium.com
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Psychologists have only seriously begun analyzing self-talk in the last couple of decades, and here’s what we know:1) Positive self-talk improves performance in most sports.2) Questions like “Will I do this?” produce better results than statements like “I will do this.”3) Using “we” in self-talk is better than using “I.”4) Talking about yourself in third person is more effective than talking in first person.5) Both motivational (“I will do this!“) and instructional (“See the target…straighten elbows…lock onto target…“) self-talk seems to be effective in enhancing performance.
How to talk to yourself! Positive Self - talk and motivation are best executed when done this:
1) Positive self-talk improves performance in most sports.
2) Questions like “Will I do this?” produce better results than statements like “I will do this.”
3) Using “we” in self-talk is better than using “I.”
4) Talking about yourself in third person is more effective than talking in first person.
5) Both motivational (“I will do this!“) and instructional (“See the target…straighten elbows…lock onto target…“) self-talk seems to be effective in enhancing performance.
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github.com github.com
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It's fast. The Dart VM is highly optimized, and getting faster all the time (for the latest performance numbers, see perf.md). It's much faster than Ruby, and close to par with C++.
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dl.acm.org dl.acm.org
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Preserving user privacy is difficult when detectingmore nuanced forms of censorshipSome forms of softcensorship might involve intentional performance degrada-tion or content manipulation. Detecting this type of behav-ior would require comparing performance or content acrossgroups of users, but such a comparison also implies thateach user must reveal their browsing history.
If you want to investigate whether content for a user was manipulated or performance was degraded, there may be no other way but to access detailed logs of their usage. This might raise privacy concerns.
Not only is personalization difficult to disambiguate from manipulation and censorship, personalization also makes it more costly to compare the personalized experience to some baseline value to determine if manipulation or performance degradation has taken place.
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- Oct 2020
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hypothes.is hypothes.is
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- The best projects start with goals and plans.
- The subconscious has so much to do with success.
- Our subconscious decides whether to accept something into our awareness based on something called "Hot Goals".
- From this udemy course, I will learn how to set goals with the MOMA subconscious method, by which I convert what's not working for me into a HOT GOAL.
- Achieving hot goals is the means of the subconscious mind to keep you safe even if it isn't necessary.
- If your goals have to become hot goals then, your conscious goals must translate to subconscious goals.
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icla2020b.jonreeve.com icla2020b.jonreeve.com
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“But nobody sees us,”
This line, combined with how Josephine feels like she can't laugh at anything, makes me think about the outward performance of grief, and the feelings you are expected to include in that performance. By asking why they would dress in black if nobody can see them, Josephine is recognizing that dressing in mourning is just a part of playing the role of grieving daughter.
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github.com github.com
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We could freeze the objects in the model but don't for efficiency. (The benefits of an immutable-equivalent data structure will be documented in vtree or blog post at some point)
first sighting: "immutable-equivalent data"
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2ality.com 2ality.com
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trusktr herman willems • 2 years ago Haha. Maybe React should focus on a template-string syntax and follow standards (and provide options for pre-compiling in Webpack, etc).
Well anywho, there's other projects now like hyperHTML, lit-html, etc, plus some really fast ones: https://www.stefankrause.ne...
React seems a little old now (and the new Hooks API is also resource heavy).
• Share ›  Michael Calkins trusktr • 4 years ago • edited That's a micro optimization. There isn't a big enough difference to matter unless you are building a game or something extraordinarily odd.
• Share › −  trusktr Michael Calkins • 2 years ago True, it matters if you're re-rendering the template at 60fps (f.e. for animations, or for games). If you're just changing views one time (f.e. a URL route change), then 100ms won't hurt at all.
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medium.com medium.com
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Virtual DOM is valuable because it allows you to build apps without thinking about state transitions, with performance that is generally good enough
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In the vast majority of cases there’s nothing wrong about wasted renders. They take so little resources that it is simply undetectable for a human eye. In fact, comparing each component’s props to its previous props shallowly (I’m not even talking about deeply) can be more resource extensive then simply re-rendering the entire subtree.
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academic.oup.com academic.oup.com
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Abbott, K. R., & Sherratt, T. N. (2013). Optimal sampling and signal detection: Unifying models of attention and speed–accuracy trade-offs. Behavioral Ecology, 24(3), 605–616. https://doi.org/10.1093/beheco/art001
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www.theguardian.com www.theguardian.com
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correspondent, N. D. S. (2020, October 9). “Brain fog”: The people struggling to think clearly months after Covid. The Guardian. https://www.theguardian.com/world/2020/oct/09/brain-fog-the-people-struggling-to-think-clearly-months-after-covid
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covid-19.iza.org covid-19.iza.org
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IZA – Institute of Labor Economics. ‘COVID-19 and the Labor Market’. Accessed 6 October 2020. https://covid-19.iza.org/publications/dp13683/.
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- Sep 2020
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rollupjs.org rollupjs.orgRollup1
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If you need to call the function repeatedly, this is much, much faster than using eval.
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www.theguardian.com www.theguardian.com
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Partridge, Joanna. ‘Revive London’s West End with Culture Vouchers, Urges Thinktank’. The Guardian, 2 September 2020, sec. Stage. https://www.theguardian.com/stage/2020/sep/02/revive-londons-west-end-with-culture-vouchers-urges-thinktank.
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now.tufts.edu now.tufts.edu
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Warning witnesses of the possibility of misinformation helps protect their memory accuracy. (2020, August 30). Tufts Now. https://now.tufts.edu/news-releases/warning-witnesses-possibility-misinformation-helps-protect-their-memory-accuracy
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- Aug 2020
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pragmaticpineapple.com pragmaticpineapple.com
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For example, to search for text occurrences, I used ack-grep. Later on, I found that there is a faster approach using ag. Then, there is an even faster alternative called ripgrep.
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covid-19.iza.org covid-19.iza.org
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Cognitive Performance in the Home Office – Evidence from Professional Chess. COVID-19 and the Labor Market. (n.d.). IZA – Institute of Labor Economics. Retrieved July 29, 2020, from https://covid-19.iza.org/publications/dp13491/
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stackoverflow.com stackoverflow.com
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Speed example -- over 829 files, the "find -exec" method took 26 seconds while the "find -print0 | xargs --null" method tool 0.7 seconds. Significant difference.
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- Jul 2020
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elemental.medium.com elemental.medium.com
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Payton, L. T. (2020, July 21). The Best Masks for Every Situation, According to Health Experts. Medium. https://elemental.medium.com/the-best-masks-for-every-situation-according-to-health-experts-80c068233828
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amp.dev amp.dev
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Building blocks that ensure performance It takes a lot of time and effort to build a great website. AMP components are already optimized for the best performance.
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Pastor, L., & Vorsatz, M. B. (2020). Mutual Fund Performance and Flows During the COVID-19 Crisis (Working Paper No. 27551; Working Paper Series). National Bureau of Economic Research. https://doi.org/10.3386/w27551
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svelte.dev svelte.dev
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In some frameworks you may see recommendations to avoid inline event handlers for performance reasons, particularly inside loops. That advice doesn't apply to Svelte — the compiler will always do the right thing, whichever form you choose.
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blog.union.io blog.union.io
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One problem—not a fatal one, but still an issue with any virtual DOM—is that embedding SVGs directly into your app can be a resource hog. No matter how much you compress, no matter how logical and streamlined your components, if you need to load up hundreds of very-complex SVGs, React will need to track all of their nodes, and updating them becomes a chore.
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www.npr.org www.npr.org
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Is Remote Work Here To Stay? (n.d.). NPR.Org. Retrieved July 4, 2020, from https://www.npr.org/sections/money/2020/06/30/882834590/is-remote-work-here-to-stay
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- Jun 2020
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medium.com medium.com
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If those comments are loaded outside of the blog_post association, then attempting to reference the blog_post association from within each comment will result in N blog_posts table queries even if they all belong to the same BlogPost!
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Mohseni-Kabir, A., Pant, M., Towsley, D., Guha, S., & Swami, A. (2020). Percolation Thresholds for Robust Network Connectivity. ArXiv:2006.14496 [Cond-Mat, Physics:Physics]. http://arxiv.org/abs/2006.14496
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psyarxiv.com psyarxiv.com
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Somma, F., Bartolomeo, P., Vallone, F., Argiuolo, A., Cerrato, A., Miglino, O., Mandolesi, L., Zurlo, M. C., & Gigliotta, O. (2020). Further to the left. Stress-induced increase of spatial pseudoneglect during the COVID-19 lockdown [Preprint]. PsyArXiv. https://doi.org/10.31234/osf.io/xb954
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docs.gitlab.com docs.gitlab.com
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uses a pre-clone step to seed the project with a recent archive of the repository. This is done for several reasons: It speeds up builds because a 800 MB download only takes seconds, as opposed to a full Git clone.
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gitlab.com gitlab.com
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GIT_DEPTH: '1' helps a little bit but we could speed up our pipelines massively for jobs that only rely on an image that is the sole dependency to run the job.
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psycnet.apa.org psycnet.apa.org
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Attali, Y., Budescu, D., & Arieli-Attali, M. (2020). An item response approach to calibration of confidence judgments. Decision, 7(1), 1–19. https://doi.org/10.1037/dec0000111
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psycnet.apa.org psycnet.apa.org
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Moore, D. A., & Healy, P. J. (2008). The trouble with overconfidence. Psychological Review, 115(2), 502–517. https://doi.org/10.1037/0033-295X.115.2.502
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- May 2020
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www.psychologicalscience.org www.psychologicalscience.org
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APS Backgrounder Series: Psychological Science and COVID-19: Working Remotely. (n.d.). Association for Psychological Science - APS. Retrieved April 21, 2020, from https://www.psychologicalscience.org/news/backgrounder-covid-19-remote-work.html
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about.gitlab.com about.gitlab.com
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We don't have a performance group. Ensuring GitLab is performant is the responsibility of all groups.
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psyarxiv.com psyarxiv.com
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Tomohiro, I. (2020, May 8). Consensus among group members’ shared leadership ratings polarizes group performance. https://doi.org/10.31234/osf.io/psjeu
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developers.google.com developers.google.com
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Although it can minimize the overhead of third-party tags, it also makes it trivial for anyone with credentials to add costly tags.
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psycnet.apa.org psycnet.apa.org
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Can we count on parents to help their children learn at home? (2020, May 8). Evidence for Action. https://blogs.unicef.org/evidence-for-action/can-we-count-on-parents-to-help-their-children-learn-at-home/
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- Apr 2020
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www.hcpc-uk.org www.hcpc-uk.org
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Standards of conduct, performance and ethics |. (n.d.). Retrieved April 21, 2020, from https://www.hcpc-uk.org/standards/standards-of-conduct-performance-and-ethics/
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falcon.readthedocs.io falcon.readthedocs.io
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“I feel like I’m just talking HTTP at last, with nothing in the middle. Falcon seems like the requests of backend.”
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- Mar 2020
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How do you leverage browser cache when Google’s very own Analytics.js has it’s expiry time set to 2 hours? How do you minimize DNS requests when Google advices you to copy their tracking code, linking to an externally hosted Javascript file?If that isn’t bad enough already, Google’s advice is to avoid hosting the JavaScript file locally. And why? To ensure you get access to new features and product updates.
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Why should I host analytics.js locally?The Complete Analytics Optimization Suite for WordPress gives you the best of both worlds. After activation it automagically downloads the latest version of analytics.js from Google’s servers, places the necessary tracking code in your WordPress theme’s header and keeps the local Javascript file up-to-date using an adjusted version of Matthew Horne’s update analytics script and wp_cron(). This way you can minimize DNS requests, leverage browser cache, track your visitors and still follow Google’s recommendation to use the latest features and product updates.
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code.djangoproject.com code.djangoproject.com
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I would like to make an appeal to core developers: all design decisions involving involuntary session creation MUST be made with a great caution. In case of a high-load project, avoiding to create a session for non-authenticated users is a vital strategy with a critical influence on application performance. It doesn't really make a big difference, whether you use a database backend, or Redis, or whatever else; eventually, your load would be high enough, and scaling further would not help anymore, so that either network access to the session backend or its “INSERT” performance would become a bottleneck. In my case, it's an application with 20-25 ms response time under a 20000-30000 RPM load. Having to create a session for an each session-less request would be critical enough to decide not to upgrade Django, or to fork and rewrite the corresponding components.
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- Feb 2020
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work.stevegrossi.com work.stevegrossi.com
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Performance Benchmarking What it is: Testing a system under certain reproducible conditions Why do it: To establish a baseline which can be tested against regularly to ensure a system’s performance remains constant, or validate improvements as a result of change Answers the question: “How is my app performing, and how does that compare with the past?”
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github.com github.com
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Ag was 34x faster
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Files are mmap()ed instead of read into a buffer.
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blog.loadimpact.com blog.loadimpact.com
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when we ran it natively on the source machine (i.e. not Dockerized, which reduces performance for all the tools by ~40%)
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loadimpact.com loadimpact.com
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It is also good practice to make sure that your load testing is functionally correct. Both the performance and functional goals can be codified using thresholds and checks (like asserts).
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docs.k6.io docs.k6.iok6/http2
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k6 does not run in Node.js because it would perform poorly while running larger tests.Javascript is not generally well suited for high performance. It's a Go program - to achieve maximum performance - embedding a JavaScript runtime for running tests written in JavaScript.
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k6 provides great primitives for code modularization, performance thresholds, and automation. These features make it an excellent choice for performance monitoring. You could run tests with a small amount of load to continuously monitor the performance of your production environment.
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