http://www.symfony-project.org/blog//2007/06/11/is-symfony-too-slow-slow-for-real-world-usage” rel=“nofollow”>Symfony博客 ,为支持交响更快,有人提到:
for ($i = 0; $i<count($my_array); $i++)
较慢于
for ($i = 0, $count = count($my_array); $i<$count; $i++)
他们提到的理由是“因为我们衡量了”。 但是,上述两种方法中后者速度快的原因是什么?
第一个用来计算每次循环的 $my_ array 。 第二个用来计算一次 。
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