blocks|key|1491227|text|如果它是可以在Web上下文之外测试的东西，我只需使用Unix+time命令。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1491228|entityMap^0|V|4|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

If it's something that can be tested outside the Web context, I just use the Unix <code>time</code> command.

blocks|key|1491249|text|为了更快，我这样做(用PHP)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1491250|$startTime+=+microtime(true);
doTask();+//+whatever+you+want+to+time
echo+"Time:++"+.+number_format((+microtime(true)+-+$startTime),+4)+.+"+Seconds\n";|code-block|syntax|javascript|1491251|您也可以使用像http://xdebug.org/这样的分析器。|offset|length|1491252|entityMap|0|LINK|mutability|MUTABLE|url|http://xdebug.org/^0|0|0|7|I|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

For quick stuff I do this (in PHP):

<pre><code>$startTime = microtime(true);
doTask(); // whatever you want to time
echo "Time: " . number_format(( microtime(true) - $startTime), 4) . " Seconds\n";
</code></pre>

You can also use a profiler like <a href="http://xdebug.org/" rel="noreferrer" title="xdebug">http://xdebug.org/</a>.

blocks|key|1491291|text|您可以在操作前后使用存储时间戳或microtime()等基本内容来计算所需的时间。这很容易做到，但不是很准确。也许更好的解决方案是Xdebug，我从来没有用过它，但它似乎是我能找到的最著名的PHP调试器/分析器。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1491292|entityMap|0|LINK|mutability|MUTABLE|url|http://xdebug.org/docs/profiler^0|1T|6|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You can use basic stuff like storing timestamps or microtime() before and after an operation to calculate the time needed. That's easy to do, but not very accurate. Maybe a better solution is <a href="http://xdebug.org/docs/profiler" rel="nofollow noreferrer">Xdebug</a>, i've never worked with it but it seems to be the best-known PHP debugger/profiler I can find.

blocks|key|1276461|text|Zend+Studio内置了对使用XDebug或ZendDebugger进行性能分析的支持。它会分析你的代码，准确地告诉你每个函数花了多长时间。这是一个很棒的工具，可以用来找出瓶颈在哪里。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1276462|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Zend Studio has built in support for profiling using XDebug or ZendDebugger. It will profile your code, telling you exactly how long every function took. It's a fantastic tool for figuring out where your bottlenecks are.

blocks|key|1491397|text|我最近一直在用XHProf，http://pecl.php.net/package/xhprof。它最初是由Facebook开发的，它有一个不错的web界面。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1491398|entityMap|0|LINK|mutability|MUTABLE|url|http://pecl.php.net/package/xhprof^0|E|Y|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I've been using XHProf lately <a href="http://pecl.php.net/package/xhprof" rel="nofollow noreferrer">http://pecl.php.net/package/xhprof</a>. It was originally developed by Facebook and it comes with a decent web interface.

blocks|key|1276561|text|我做了一个简单的计时类，可能对某些人有用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1276562|class+TimingHelper+{

++++private+$start;

++++public+function+__construct()+{
++++++++$this->start+=+microtime(true);
++++}

++++public+function+start()+{
++++++++$this->start+=+microtime(true);
++++}

++++public+function+segs()+{
++++++++return+microtime(true)+-+$this->start;
++++}

++++public+function+time()+{
++++++++$segs+=+$this->segs();
++++++++$days+=+floor($segs+/+86400);
++++++++$segs+-=+$days+*+86400;
++++++++$hours+=+floor($segs+/+3600);
++++++++$segs+-=+$hours+*+3600;
++++++++$mins+=+floor($segs+/+60);
++++++++$segs+-=+$mins+*+60;
++++++++$microsegs+=+($segs+-+floor($segs))+*+1000;
++++++++$segs+=+floor($segs);

++++++++return+
++++++++++++(empty($days)+?+""+:+$days+.+"d+")+.+
++++++++++++(empty($hours)+?+""+:+$hours+.+"h+")+.+
++++++++++++(empty($mins)+?+""+:+$mins+.+"m+")+.+
++++++++++++$segs+.+"s+"+.
++++++++++++$microsegs+.+"ms";
++++}

}|code-block|syntax|javascript|1276563|使用：|1276564|$th+=+new+TimingHelper();
<..code+being+mesured..>
echo+$th->time();
$th->start();+//+if+it's+the+case
<..code+being+mesured..>
echo+$th->time();

//+result:+4d+17h+34m+57s+0.00095367431640625ms+|1276565|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I've made a simple timing class, maybe it's useful to someone:

<pre><code>class TimingHelper {

 private $start;

 public function __construct() {
 $this-&gt;start = microtime(true);
 }

 public function start() {
 $this-&gt;start = microtime(true);
 }

 public function segs() {
 return microtime(true) - $this-&gt;start;
 }

 public function time() {
 $segs = $this-&gt;segs();
 $days = floor($segs / 86400);
 $segs -= $days * 86400;
 $hours = floor($segs / 3600);
 $segs -= $hours * 3600;
 $mins = floor($segs / 60);
 $segs -= $mins * 60;
 $microsegs = ($segs - floor($segs)) * 1000;
 $segs = floor($segs);

 return 
 (empty($days) ? "" : $days . "d ") . 
 (empty($hours) ? "" : $hours . "h ") . 
 (empty($mins) ? "" : $mins . "m ") . 
 $segs . "s " .
 $microsegs . "ms";
 }

}
</code></pre>

Use:

<pre><code>$th = new TimingHelper();
&lt;..code being mesured..&gt;
echo $th-&gt;time();
$th-&gt;start(); // if it's the case
&lt;..code being mesured..&gt;
echo $th-&gt;time();

// result: 4d 17h 34m 57s 0.00095367431640625ms 
</code></pre>

How can I say which class of many (which all do the same job) execute faster? is there a software to measure that?

How can I measure the speed of code written in PHP?

我如何才能说出多个(都做同样的工作)中的哪一个类执行得更快？有没有软件来衡量这一点？

问如何测量用PHP编写的代码的速度？
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何测量用PHP编写的代码的速度？EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何测量用PHP编写的代码的速度？
EN