3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = array_fill(0, 100000, true); foreach($a1 as $k => $v){ unset($a1[$k]); } var_dump(memory_get_usage()); $a2 = array_map(function($v){ return $v; }, $a1); // capacity is trimmed down. how many resizes are performed? unset($a1); var_dump(memory_get_usage()); $a2[] = true; var_dump(memory_get_usage());

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)
7.2.00.0070.01427.20
7.1.70.0100.01325.02
7.1.60.0030.01125.14
7.1.50.0070.02424.78
7.1.00.0100.07730.30
7.0.200.0130.01024.60
7.0.80.0930.06025.97
7.0.70.0670.07725.93
7.0.60.0630.07725.85
7.0.50.0700.07326.29
7.0.40.0300.06726.29
7.0.30.2700.07026.21
7.0.20.3600.08026.29
7.0.10.3130.08026.16
7.0.00.3270.09026.37
5.6.230.0270.09739.32
5.6.220.0270.08739.47
5.6.210.0270.07739.53
5.6.200.0200.08739.94
5.6.190.0330.08739.89
5.6.180.0370.08740.00
5.6.170.0300.08339.84
5.6.160.0370.10739.91
5.6.150.0500.10339.87
5.6.140.0170.12039.90
5.6.130.0330.09339.90
5.6.120.0370.08339.89
5.6.110.0330.09339.95
5.6.100.0530.09340.01
5.6.90.0170.11039.91
5.6.80.0270.09339.22
5.6.70.0330.08739.25
5.6.60.0300.09739.20
5.6.50.0530.06339.28
5.6.40.0300.08739.25
5.6.30.0430.08339.20
5.6.20.0270.10739.29
5.6.10.0430.08339.26
5.6.00.0400.08339.25

preferences:
35.96 ms | 403 KiB | 5 Q