3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = [ 'a' => '1', 'b' => '1', 'c' => '2', ]; function change_keys($array, $callback) { $temp = array_map($callback, array_combine(array_keys($array), array_keys($array))); return array_combine($temp, $array); } var_dump(change_keys($foo, function($v) { return '#' . $v; });

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)
5.4.320.0080.03412.52
5.4.310.0080.03812.52
5.4.300.0060.04012.52
5.4.290.0050.03912.51
5.4.280.0040.03712.41
5.4.270.0070.03412.41
5.4.260.0040.03912.41
5.4.250.0030.04412.41
5.4.240.0060.03512.41
5.4.230.0050.04112.40
5.4.220.0110.04012.41
5.4.210.0070.04312.40
5.4.200.0070.03912.40
5.4.190.0090.03112.40
5.4.180.0060.03312.40
5.4.170.0050.03612.40
5.4.160.0070.03712.40
5.4.150.0060.03512.40
5.4.140.0040.04012.09
5.4.130.0070.03312.07
5.4.120.0050.03512.04
5.4.110.0040.03512.03
5.4.100.0110.03412.03
5.4.90.0070.04012.03
5.4.80.0070.04012.03
5.4.70.0030.03912.02
5.4.60.0040.03512.03
5.4.50.0040.03612.02
5.4.40.0040.03512.02
5.4.30.0040.03712.01
5.4.20.0040.03612.01
5.4.10.0020.03812.01
5.4.00.0060.03411.50
5.3.290.0040.04012.80
5.3.280.0040.03712.71
5.3.270.0050.03812.73
5.3.260.0020.04112.72
5.3.250.0080.04112.71
5.3.240.0050.03712.72
5.3.230.0060.03912.71
5.3.220.0070.03612.68
5.3.210.0050.03912.68
5.3.200.0060.03612.68
5.3.190.0050.03812.68
5.3.180.0060.03612.67
5.3.170.0080.03412.67
5.3.160.0040.03812.67
5.3.150.0070.03812.68
5.3.140.0050.03612.66
5.3.130.0060.04412.66
5.3.120.0050.03812.66
5.3.110.0060.03712.66
5.3.100.0040.03812.12
5.3.90.0050.03512.09
5.3.80.0070.03812.08
5.3.70.0040.03712.08
5.3.60.0060.03412.06
5.3.50.0060.04312.00
5.3.40.0060.04112.00
5.3.30.0080.03711.95
5.3.20.0070.03811.72
5.3.10.0110.03911.70
5.3.00.0040.03811.68
5.2.170.0080.0299.18
5.2.160.0030.0319.18
5.2.150.0050.0299.18
5.2.140.0060.0299.18
5.2.130.0050.0299.14
5.2.120.0030.0349.14
5.2.110.0020.0309.14
5.2.100.0040.0299.14
5.2.90.0060.0309.14
5.2.80.0020.0319.14
5.2.70.0080.0259.14
5.2.60.0030.0309.08
5.2.50.0040.0309.05
5.2.40.0060.0299.03
5.2.30.0070.0259.02
5.2.20.0030.0319.00
5.2.10.0050.0348.92
5.2.00.0050.0288.79
5.1.60.0040.0238.07
5.1.50.0030.0258.06
5.1.40.0080.0208.05
5.1.30.0040.0268.40
5.1.20.0040.0278.42
5.1.10.0080.0238.14
5.1.00.0040.0288.14
5.0.50.0020.0216.63
5.0.40.0020.0216.48
5.0.30.0040.0306.29
5.0.20.0040.0196.27
5.0.10.0030.0206.24
5.0.00.0030.0306.23
4.4.90.0030.0144.78
4.4.80.0020.0154.75
4.4.70.0020.0154.76
4.4.60.0020.0154.75
4.4.50.0020.0154.77
4.4.40.0050.0314.71
4.4.30.0010.0164.76
4.4.20.0010.0164.85
4.4.10.0050.0254.85
4.4.00.0030.0244.76
4.3.110.0030.0184.66
4.3.100.0020.0154.66
4.3.90.0050.0184.63
4.3.80.0010.0254.58
4.3.70.0050.0124.63
4.3.60.0020.0144.62
4.3.50.0020.0154.63
4.3.40.0020.0274.53
4.3.30.0020.0153.28
4.3.20.0030.0143.26
4.3.10.0040.0143.22
4.3.00.0070.0177.21

preferences:
140.14 ms | 1398 KiB | 7 Q