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    <p>In test with 100000 cycles i had such results:</p> <pre><code>bin/php-test CloneVsNew [============================================================&gt;] 100000 u | 4399 u/s | Est: 0.0 s | Mem: 342,74 KB | Max: 367,1 KB [============================================================&gt;] 100000 u | 4105 u/s | Est: 0.0 s | Mem: 343,14 KB | Max: 367,1 KB New 1,282884 sec. Clone 1,107343 sec. </code></pre> <p>So, seems clone slightly more efficient way to copy objects. Here is test code:</p> <pre><code>class CloneVsNew extends TestApplication { final public static function run() { $repeats = 100000; $bar = new CliProgressBar($repeats); for ($i = 0; $i &lt;= $repeats; ++$i) { Timer::start(); $myobj1=new \stdClass(); $myobj2=new \stdClass(); $myobj3=new \stdClass(); $myobj4=new \stdClass(); Timer::stop(); $bar-&gt;update($i); } self::addResult('New', Timer::get()); $bar = new CliProgressBar($repeats); Timer::reset(); for ($i = 0; $i &lt;= $repeats; ++$i) { Timer::start(); $myobj1 = new \stdClass(); $myobj2 = clone $myobj1; $myobj3 = clone $myobj1; $myobj4 = clone $myobj1; Timer::stop(); $bar-&gt;update($i); } self::addResult('Clone', Timer::get()); } } </code></pre> <p>Tested on:</p> <pre><code>php -v PHP 5.4.17-1~dotdeb.1 (cli) (built: Jul 6 2013 16:20:31) Copyright (c) 1997-2013 The PHP Group Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies with Xdebug v2.2.3, Copyright (c) 2002-2013, by Derick Rethans </code></pre> <p>Other php versions can show other results.</p> <p><strong>Update:</strong></p> <p>For the test used <a href="https://github.com/nafigator/php-bench" rel="nofollow">php-bench</a> tool.</p>
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    1. POWhich is more efficient when creating many objects together in php?
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    1. USAlexander Yancharuk
    1. USAlexander Yancharuk
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      1. VTUpMod
    1. CO`clone` is basically just a C `memcpy`, so it makes sense that it would be a little faster. The difference is negligible, though, and would only be relevant if you are cloning a massive amount of objects...
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      1. USSverri M. Olsen
    2. CO@alexander-yancharuk +1 for your test Although I get unstable results with 100000 (the fastest is sometimes new sometmes clone because the difference is negligible and different resources are allocated each time) I realised that as the difference is negligible Sverri M. Olsen is right. Because there is not much difference, memcpy could happen straight away without having to wait for changes, but I haven't seen any memory usage increase on system monitor which might be because the objects don't contain any data. I 'll have to check with populated objects when I have free time.
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      1. USAndreas
    3. COI 've done it with 99999999 objects (hoping that most of the time they ll get the same resources) I got: **New:506.75122475624 Clone:530.91913843155** Still I am not sure if this would be the result if the objects contained some data or had operations happening in the constructor.
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