"a rich selection of tools available to the Java community for gathering code metrics"

"This wiki is centered around writing a better code, researching algorithms, and performing code optimization."

"What code shapes does the JVM optimize best? Here is a list."

Indeed, these tips do not suck.

I'm pretty tired of lists of tips, but these are good.

Some day I will have to do this for something.

I want this, plus some other stuff.

"This rails plugin not only runs "EXPLAIN" before each of your select queries in development, but provides a small DIV in the rendered output of each page with the summary of query warnings that it analyzed."

"we spend less than 18 system calls on serving a cache hit, and even many of those are calls to get timestamps for statistics"

All the various things that Rails does in-optimally w/r/t MySQL, and some solutions.

Some quality tips in here. Not the usual bullshit.

JavaScript and CSS Asset Compression for Production Rails Apps

action caching, fragment caching, etc. good for the basics.

a practical example of using RubyInline for improved performance

lots of neat theory

this is like the textual equivalent of the Penny Arcade podcast for language geeks: listening in to the successes and failures and snide asides while witnessing something casually brilliant.

come back to when optimization wouldn't be considered premature.