PHP5 Benchmarks: for vs while, count vs sizeof, md5 vs sha1 and other speed comparisons like these for those who really need an extra millisecond of optimisation. I like this.
PHP : Variables vs Constants
I thought, and had been told, that using constants instead of variables in PHP was mostly a matter of speed : at run time, the engine replaces every occurrence of a constant with its hard-coded value, making code presumably faster than using variables that must be evaluated each time they are encountered. Or something like this. Wondering how big or…