如何加快这种方法？ [英] How to speed up this method?

问题描述

我正在使用（高度优化/适应版本的）CakePHP 2.3和我的应用程序运行在非常慢的硬件（300MHz ARM），所以我仍然优化，无论我在哪里可以。框架的一个方法被称为非常经常和不是非常快（〜0.5-1ms），但我不能想到一种方法来改善它（没有改变输出） - 总共我花了总时间的5％这个方法：

I am working with a (highly optimized/adapted version of) CakePHP 2.3 and my application is running on VERY slow hardware (300MHz ARM) so I am still optimizing wherever I can. One method of the framework is called VERY often and not very fast (~0.5-1ms), but I can not think of a way to improve it (without changing the output) - in total I spend ~5% of the total time in this method:

function pluginSplit($name, $dotAppend = false, $plugin = null) {
    if (strpos($name, '.') !== false) {
        $parts = explode('.', $name, 2);
        if ($dotAppend) {
            $parts[0] .= '.';
        }
        return $parts;
    }
    return array($plugin, $name);
}

有没有人知道如何加快速度？ strong>

Does anyone have an idea how to speed this up?

根据profiler，strpos需要约5％的时间和爆炸〜1％：


（分析大约是正常执行的10-15倍 - > 8.8ms是〜0.5-1ms，而不是分析器）

According to the profiler strpos takes about 5% of the methods time and explode ~1%:
(Profiling is about 10-15 times slower then normal execution --> 8.8ms are ~0.5-1ms without the profiler)

推荐答案

只是一点改进，不搜索字符串2次：

just a little improvement not to search the string 2 times:

function pluginSplit($name, $dotAppend = false, $plugin = null) {
  if (count($parts = explode('.', $name, 2)) === 2) {
    if ($dotAppend) {
      $parts[0] .= '.';
    }
    return $parts;
  }
  return array($plugin, $name);
}

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