note 27674 added to function.str-replace

I was curious which was faster, str_replace(), or strtr() in temrs of single character replacement. I suspected strtr() and was proved right. This script is a little amateur but I suspect it is atleast fair in terms of comparison because I tested the functions exactly the same way, but first the results. Time for first process, strtr(), was 3.26289403439 Time for second process, str_replace(), was 3.82604897022 This was over 1 million trials each, using a while loop on my P4 1.8gHz. There is almost a 20% speed boost using strtr() for those sigle char replacements. <? //benchmark script $time1 = getMicroTime(); $i = 0; while ($i < 1000000) { $str = '192.168.0.75'; $str = strtr($str,'.',""); $i++; } echo "Time for first process, strtr(), was ".(getMicroTime()-$time1)."\r\n"; $time2 = getMicroTime(); $i = 0; while ($i < 1000000) { $str = '192.168.0.75'; $str = str_replace('.',"",$str); $i++; } echo "Time for second process, str_replace(), was ".(getMicroTime()-$time2)."\r\n"; //returns seconds since epoch + microseconds, as seconds function getMicroTime(){ list($usec, $sec) = explode(' ',microtime()); return ((float)$usec + (float)$sec); } ?> -- http://www.php.net/manual/en/function.str-replace.php http://master.php.net/manage/user-notes.php?action=edit+27674 http://master.php.net/manage/user-notes.php?action=delete+27674 http://master.php.net/manage/user-notes.php?action=reject+27674