What we ultimately should care about is being able to use our knowledge to produce something new, whatever that may be. To not merely reproduce you must understand the material. And understanding requires application, a hermeneutic principle that particularly Gadamer worked out extensively. If you really want to measure your level of understanding, you should try to apply or explain something to yourself or someone else.

QueryRecorder is a tool for detecting the N+1 queries problem from tests.

If you want a DIY version of this, try ImageMagick's compare command: compare bag_frame1.gif bag_frame2.gif compare.gif Documentation: http://www.imagemagick.org/Usage/compare/ reply no_gravity 2 hours ago Interesting. And to render the html you can use cutycapt. Which is in the Debian repos too. I just tried it, and this rendered a nice diff of two pages for me: cutycapt --url=http://www.xyz.com/1 --out=1.png cutycapt --url=http://www.xyz.com/2 --out=2.png compare 1.png 2.png diff.png reply easytiger 2 hours ago Now make it a webservice and charge $200/month! reply programmernews3 1 hour ago First part already done: http://archive.is/ reply prottmann 1 hour ago apt-get install the services and use them on my server ;-) reply