PHP strtr与str_replace函数性能简单测试

strtr与str_replace函数性能，很简单的一个测试，只是简单的测下，供参考，代码如下：

<?php
require_once('Timer.php');
$target = 'qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./';
$count = isset($argv[1]) ? (int)$argv[1] : 1;
$needle = 'vb';

Timer::getInstance()->begin();
for($i = 0; $i < $count; $i++) {
	strtr($target, $needle, '*');
}
echo "strtr exec {$count} times used time: " . Timer::getInstance()->end()->gone() . " sec.\n";
//----------------------------------------------------------------------------------------------

Timer::getInstance()->begin();
for($i = 0; $i < $count; $i++) {
	str_replace($needle, '*', $target);
}
echo "str_replace exec {$count} times used time: " . Timer::getInstance()->end()->gone() . " sec.\n";

结果如下：

那个正则替换的那个就不测了，应该是赶不上这两个的。