[The Zen of Code Optimization][1] by Michael Abrash

![The Zen of Code Optimization][2]

A must-read for realtime programmers - even if the processor specific infomation is dated, the mindset is invaluable.


 [1]: http://www.amazon.com/Zen-Code-Optimization-Ultimate-Software/dp/1883577039
 [2]: https://i.sstatic.net/05SDa.jpg