php中静态方法static和非静态方法效率对照
php中静态方法static和非静态方法效率对比
今天在看这篇文章的时候http://jingyan.baidu.com/article/6b97984d7892d21ca2b0bfc2.html发现第一句是这个
如果能将类的方法定义成static,就尽量定义成static,它的速度会提升将近4倍。
实践是检验代码执行效率的唯一标准,于是趁着下班回家有点时间,做了个小测试:
先上测试代码(如果有不对的地方,请大家指正哈):
测试环境:
/test # php -vPHP 5.4.24 (cli) (built: Jan 19 2014 21:32:15) Copyright (c) 1997-2013 The PHP GroupZend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies
/test # uname -aDarwin 192.168.0.101 13.1.0 Darwin Kernel Version 13.1.0: Thu Jan 16 19:40:37 PST 2014; root:xnu-2422.90.20~2/RELEASE_X86_64 x86_64
系统配置可以看这篇文章中的:http://blog.csdn.net/lamp_water/article/details/20968155
<?phpclass staticTest { public function test() { $i = 0; $i++; } public static function testStatic() { $i = 0; $i++; } }$start = microtime(true);for($i=0;$i<10000000;$i++) { $test = new staticTest(); $test->test();}echo (microtime(true) - $start) ."\n";$start = microtime(true);for($i=0;$i<br>循环执行一千万次执行结果如下:<p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"></span></span></p><p class="p1"><span class="s1"><strong>/test # </strong></span>php staticTest.php </p><p class="p1">2.2938342094421</p><p class="p1">1.1871800422668<br><strong>第二次执行结果:</strong></p><p class="p1"></p><p class="p1">2.303295135498</p><p class="p1">1.1807670593262</p>执行很多次以后,都在2.3和1.18附近。可见,虽然没有文章中说的效率提升那么恐怖,性能的提升方面确实提升了一倍左右。<p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px">因此还是建议:</span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><span style="color:rgb(51,51,51); font-family:'Microsoft Yahei',微软雅黑,arial,宋体,sans-serif; font-size:16px; line-height:28px; text-align:justify">如果能将类的方法定义成static,就尽量定义成static,它的速度会提升将近1倍。</span><br></span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><span style="color:rgb(51,51,51); font-family:'Microsoft Yahei',微软雅黑,arial,宋体,sans-serif; font-size:16px; line-height:28px; text-align:justify">对于一个正常的php框架,里面的类和方法还是非常多的,如果我们能够做成静态方法,还是使用静态方法比较好,效率比较高。</span></span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><br></span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><br></span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><br></span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><br></span></span></p><div class="clear"> </div>

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