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); } $add_hash = function($v) { return '#' . $v; }; var_dump(change_keys($foo, $add_hash));

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)
5.4.320.0070.04112.52
5.4.310.0060.04712.52
5.4.300.0040.03612.52
5.4.290.0040.03812.52
5.4.280.0080.03112.41
5.4.270.0050.03612.41
5.4.260.0070.03612.42
5.4.250.0050.03812.41
5.4.240.0040.03812.42
5.4.230.0060.03712.41
5.4.220.0050.03712.41
5.4.210.0060.03512.41
5.4.200.0050.03712.41
5.4.190.0100.05512.40
5.4.180.0070.03512.40
5.4.170.0070.04412.41
5.4.160.0070.04112.41
5.4.150.0040.03612.40
5.4.140.0080.03312.09
5.4.130.0050.03512.07
5.4.120.0030.03612.04
5.4.110.0040.03612.04
5.4.100.0070.03412.04
5.4.90.0030.04112.03
5.4.80.0070.03512.04
5.4.70.0070.03212.03
5.4.60.0040.05012.03
5.4.50.0110.03912.03
5.4.40.0080.03312.02
5.4.30.0060.03512.02
5.4.20.0090.03712.01
5.4.10.0070.04412.02
5.4.00.0070.04211.50
5.3.290.0090.04112.80
5.3.280.0070.03512.71
5.3.270.0020.04712.72
5.3.260.0070.04112.72
5.3.250.0070.03612.72
5.3.240.0080.03512.72
5.3.230.0050.03812.71
5.3.220.0070.03512.68
5.3.210.0120.04812.68
5.3.200.0080.03412.68
5.3.190.0070.04012.67
5.3.180.0070.05112.68
5.3.170.0070.03812.67
5.3.160.0050.03712.67
5.3.150.0030.03912.68
5.3.140.0100.03212.66
5.3.130.0070.03712.66
5.3.120.0050.03912.66
5.3.110.0050.04012.66
5.3.100.0070.03612.11
5.3.90.0100.03812.08
5.3.80.0070.04612.07
5.3.70.0070.04212.08
5.3.60.0050.03712.07
5.3.50.0100.03112.00
5.3.40.0040.04512.00
5.3.30.0050.03511.95
5.3.20.0050.03511.72
5.3.10.0080.03211.70
5.3.00.0050.03711.68
5.2.170.0030.0319.18
5.2.160.0070.0269.18
5.2.150.0050.0309.18
5.2.140.0030.0329.18
5.2.130.0010.0329.14
5.2.120.0030.0299.14
5.2.110.0030.0309.15
5.2.100.0050.0289.14
5.2.90.0060.0299.14
5.2.80.0040.0309.14
5.2.70.0070.0279.14
5.2.60.0060.0299.09
5.2.50.0040.0299.06
5.2.40.0050.0289.03
5.2.30.0050.0339.02
5.2.20.0040.0299.00
5.2.10.0040.0298.93
5.2.00.0050.0298.79
5.1.60.0040.0248.07
5.1.50.0010.0288.07
5.1.40.0040.0298.04
5.1.30.0050.0268.40
5.1.20.0050.0278.42
5.1.10.0060.0268.14
5.1.00.0050.0258.14
5.0.50.0020.0226.62
5.0.40.0030.0196.48
5.0.30.0040.0316.29
5.0.20.0040.0206.27
5.0.10.0030.0226.23
5.0.00.0050.0316.23
4.4.90.0010.0174.78
4.4.80.0050.0204.76
4.4.70.0030.0234.75
4.4.60.0000.0184.75
4.4.50.0020.0254.77
4.4.40.0020.0254.71
4.4.30.0010.0264.76
4.4.20.0020.0224.84
4.4.10.0000.0184.85
4.4.00.0060.0344.76
4.3.110.0010.0174.67
4.3.100.0010.0164.66
4.3.90.0030.0144.63
4.3.80.0030.0244.59
4.3.70.0030.0204.63
4.3.60.0030.0184.63
4.3.50.0020.0164.62
4.3.40.0040.0224.53
4.3.30.0010.0163.28
4.3.20.0020.0153.25
4.3.10.0010.0173.22
4.3.00.0100.0207.21

preferences:
133.56 ms | 1398 KiB | 7 Q