php测试性能代码
时间:2014-06-09 16:40来源: 作者: 点击:
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function microtime_float() { list( $usec , $sec )= explode ( ,microtime()); return ((float) $usec +(float) $sec ); } function echotime( $name ) { static $t_start =0; $t_end =microtime_float(); if ( $name != start ){ $time = $t_end - $t_start ; echo (
- function microtime_float ()
- {
- list ($usec, $sec) = explode(" ", microtime());
- return ((float) $usec + (float) $sec);
- }
- function echotime ($name)
- {
- static $t_start = 0;
- $t_end = microtime_float();
- if ($name != 'start') {
- $time = $t_end - $t_start;
- echo ($name . ':');
- echo intval($time * 1000);
- echo "<br>\n";
- }
- $t_start = $t_end;
- }
- $index = 1000;
- $loop = 10000;
- $length = 10000;
- $key = "abc" . $index;
- $array = array();
- for ($i = 0; $i < $length; $i ++) {
- $array['abc' . $i] = 'abc' . $i;
- }
- echotime('start');
- for ($i = 0; $i < $loop; $i ++) {
- if (array_key_exists($key, $array)) {
- $a = true;
- }
- }
- echotime('array_key_exists');
- for ($i = 0; $i < $loop; $i ++) {
- if (isset($array[$key])) {
- $a = true;
- }
- }
- echotime('isset');
- for ($i = 0; $i < $loop; $i ++) {
- if (in_array($key, $array)) {
- $a = true;
- }
- }
- echotime('in_array');
- for ($i = 0; $i < $loop; $i ++) {
- if (array_search($key, $array)) {
- $a = true;
- }
- }
- echotime('array_search');
- $array2 = array_flip($array);
- for ($i = 0; $i < $loop; $i ++) {
- if (isset($array2[$key])) {
- $a = true;
- }
- }
- echotime('flip and search');
- $array2 = $array;
- foreach ($array2 as $k => $v) {
- $array2[$k] = strtoupper($v);
- }
- echotime('foreach1');
- $array2 = $array;
- foreach ($array2 as &$v) {
- $v = strtoupper($v);
- }
- echotime('foreach2');
- $array2 = $array;
- $array2 = array_map('strtoupper', $array2);
- echotime('array_map');
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