I have found an interesting small article about optimization, so I've tried the code in C and D, and I have found strange results (the D code shows timings opposite of the article). This is the article, look at the "Branch Prediction" section: http://www.ddj.com/184405848
The C code: http://codepad.org/QSGIije4 And its asm (MinGW 4.2.1): http://codepad.org/c7ZRiXGI The similar D code: http://codepad.org/slhcSJEA Its asm (DMD 1.036): http://codepad.org/AjlraEs9 There is also about 2X performance difference. Bye, bearophile
