3v4l.org

run code in 300+ PHP versions simultaneously
<?php $b = [1, 2, 3]; foreach(&$b ?: [] as &$v){ $v = $v*2; unset($v); } var_dump($b);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
5.6.150.0170.06318.22
5.6.140.0100.07718.27
5.6.130.0000.04718.29
5.6.120.0170.07021.00
5.6.110.0070.06021.03
5.6.100.0100.04320.95
5.6.90.0170.07721.00
5.6.80.0130.06720.52
5.5.300.0070.05017.98
5.5.290.0030.08318.01
5.5.280.0200.07020.97
5.5.270.0070.09020.86
5.5.260.0070.03720.79
5.5.250.0100.06720.68
5.5.240.0270.05320.12

preferences:
142.62 ms | 1398 KiB | 7 Q