3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = [ 'a' => '1', 'b' => '1', 'c' => '2', ]; function change_keys($array, $callback) { return array_combine(array_map($callback, array_combine(array_keys($array), array_keys($array))), $array); } var_dump(change_keys($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)
8.3.60.0040.01116.38
8.3.50.0150.00722.99
8.3.40.0140.00018.71
8.3.30.0090.00919.09
8.3.20.0070.00020.04
8.3.10.0000.00823.48
8.3.00.0030.00619.38
8.2.180.0190.00016.75
8.2.170.0140.00022.96
8.2.160.0040.01120.40
8.2.150.0090.00024.18
8.2.140.0070.00024.66
8.2.130.0040.00426.16
8.2.120.0040.00420.88
8.2.110.0090.00020.43
8.2.100.0090.00317.84
8.2.90.0030.00619.27
8.2.80.0040.00417.97
8.2.70.0090.00017.34
8.2.60.0090.00217.79
8.2.50.0060.00318.07
8.2.40.0030.00618.16
8.2.30.0050.00218.20
8.2.20.0050.00217.76
8.2.10.0070.00018.08
8.2.00.0000.00717.65
8.1.280.0100.01025.92
8.1.270.0000.01023.99
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0070.00322.57
8.1.230.0080.00320.89
8.1.220.0080.00018.77
8.1.210.0000.00918.77
8.1.200.0040.00417.22
8.1.190.0050.00317.38
8.1.180.0040.00418.10
8.1.170.0050.00518.59
8.1.160.0040.00422.02
8.1.150.0070.00018.81
8.1.140.0070.00017.42
8.1.130.0040.00417.45
8.1.120.0070.00017.38
8.1.110.0050.00317.52
8.1.100.0000.00717.39
8.1.90.0020.00517.49
8.1.80.0080.00017.46
8.1.70.0040.00417.43
8.1.60.0040.00417.65
8.1.50.0050.00217.53
8.1.40.0030.00617.37
8.1.30.0040.00417.57
8.1.20.0040.00417.54
8.1.10.0040.00417.39
8.1.00.0000.00817.33
8.0.300.0040.00419.98
8.0.290.0030.00616.75
8.0.280.0000.00718.33
8.0.270.0030.00316.73
8.0.260.0000.00716.74
8.0.250.0030.00316.93
8.0.240.0030.00316.95
8.0.230.0000.00816.92
8.0.220.0030.00316.88
8.0.210.0000.00616.88
8.0.200.0030.00316.98
8.0.190.0000.00817.02
8.0.180.0060.00316.95
8.0.170.0040.00416.83
8.0.160.0030.00316.73
8.0.150.0000.00816.88
8.0.140.0040.00416.74
8.0.130.0050.00013.40
8.0.120.0050.00316.89
8.0.110.0050.00316.77
8.0.100.0020.00516.76
8.0.90.0070.00016.76
8.0.80.0100.01316.83
8.0.70.0000.00716.70
8.0.60.0050.00216.94
8.0.50.0000.00716.87
8.0.30.0100.01217.05
8.0.20.0020.01717.40
8.0.10.0000.00716.90
8.0.00.0140.00416.73
7.4.330.0030.00315.09
7.4.320.0060.00016.50
7.4.300.0000.00616.40
7.4.290.0040.00416.54
7.4.280.0040.00416.60
7.4.270.0070.00016.51
7.4.260.0000.00716.38
7.4.250.0040.00416.37
7.4.240.0040.00316.52
7.4.230.0040.00416.70
7.4.220.0140.00316.57
7.4.210.0140.00016.45
7.4.200.0000.00816.39
7.4.160.0100.00616.27
7.4.150.0100.00717.40
7.4.140.0110.00917.86
7.4.130.0080.00816.54
7.4.120.0110.00616.48
7.4.110.0190.00316.44
7.4.100.0140.00316.31
7.4.90.0090.00916.48
7.4.80.0070.01019.39
7.4.70.0110.00716.56
7.4.60.0100.00716.56
7.4.50.0000.00716.20
7.4.40.0110.00616.48
7.4.30.0090.00916.66
7.4.00.0030.01015.19
7.3.330.0050.00013.28
7.3.320.0000.00513.25
7.3.310.0000.00716.29
7.3.300.0030.00316.31
7.3.290.0040.01516.26
7.3.280.0090.00616.29
7.3.270.0120.00617.40
7.3.260.0080.00816.38
7.3.250.0120.00916.39
7.3.240.0070.01016.58
7.3.230.0120.00616.51
7.3.210.0090.00916.23
7.3.200.0100.01119.39
7.3.190.0070.01016.55
7.3.180.0070.01016.41
7.3.170.0060.01216.61
7.3.160.0130.00316.47
7.2.330.0150.00316.37
7.2.320.0120.00916.29
7.2.310.0150.00416.40
7.2.300.0080.01116.29
7.2.290.0120.00616.59
7.1.100.0000.01118.29
7.1.70.0030.00917.03
7.1.60.0100.00719.40
7.1.50.0030.00717.08
7.1.00.0000.06022.46
7.0.200.0040.00416.53
7.0.140.0030.09722.07
7.0.100.0000.06719.91
7.0.90.0030.04719.91
7.0.80.0000.04319.91
7.0.70.0100.03320.04
7.0.60.0030.05319.94
7.0.50.0130.05020.30
7.0.40.0100.03320.14
7.0.30.0000.04320.08
7.0.20.0100.04020.04
7.0.10.0100.08319.98
7.0.00.0100.06020.18
5.6.280.0030.07321.10
5.6.250.0000.04320.59
5.6.240.0030.04320.70
5.6.230.0000.04320.69
5.6.220.0000.04320.58
5.6.210.0030.04320.64
5.6.200.0070.08720.96
5.6.190.0000.05020.96
5.6.180.0130.03721.07
5.6.170.0030.08721.09
5.6.160.0030.07321.12
5.6.150.0030.08021.05
5.6.140.0130.07721.02
5.6.130.0200.05021.02
5.6.120.0070.07321.09
5.6.110.0030.08321.11
5.6.100.0100.08020.95
5.6.90.0130.08320.95
5.6.80.0130.07720.56
5.6.70.0130.05720.46
5.6.60.0070.07720.55
5.6.50.0070.05020.57
5.6.40.0100.08020.48
5.6.30.0130.07020.43
5.6.20.0030.06320.44
5.6.10.0070.08020.40
5.6.00.0030.05320.39
5.5.380.0000.04720.43
5.5.370.0030.05020.36
5.5.360.0030.04020.34
5.5.350.0100.03320.43
5.5.340.0070.04020.78
5.5.330.0000.08020.89
5.5.320.0070.03720.81
5.5.310.0130.07020.88
5.5.300.0100.06720.80
5.5.290.0100.08020.78
5.5.280.0100.08020.86
5.5.270.0030.06020.80
5.5.260.0100.05020.86
5.5.250.0100.07320.73
5.5.240.0030.08720.13
5.5.230.0130.07320.31
5.5.220.0100.06720.30
5.5.210.0130.05020.25
5.5.200.0030.05020.23
5.5.190.0070.08320.25
5.5.180.0070.08320.14
5.5.160.0070.08320.19
5.5.150.0100.04720.18
5.5.140.0100.07720.04
5.5.130.0100.08020.22
5.5.120.0030.07720.14
5.5.110.0130.07320.07
5.5.100.0100.07020.07
5.5.90.0000.07020.07
5.5.80.0000.07720.01
5.5.70.0070.08020.05
5.5.60.0100.07320.01
5.5.50.0070.07020.06
5.5.40.0200.06720.04
5.5.30.0100.07720.16
5.5.20.0070.06320.15
5.5.10.0100.07319.98
5.5.00.0070.06320.02
5.4.450.0170.07319.38
5.4.440.0170.07019.18
5.4.430.0030.08319.44
5.4.420.0030.05719.50
5.4.410.0130.07719.32
5.4.400.0030.07319.16
5.4.390.0100.07318.92
5.4.380.0030.04719.04
5.4.370.0100.04719.13
5.4.360.0130.07319.05
5.4.350.0100.06019.05
5.4.340.0130.03719.09
5.4.320.0030.08019.21
5.4.310.0070.04719.03
5.4.300.0170.06719.18
5.4.290.0170.06318.84
5.4.280.0070.08019.23
5.4.270.0130.06319.11
5.4.260.0030.08319.03
5.4.250.0070.08019.09
5.4.240.0100.07318.84
5.4.230.0100.07319.04
5.4.220.0130.06018.84
5.4.210.0030.07018.84
5.4.200.0000.08019.25
5.4.190.0100.07718.94
5.4.180.0170.03718.86
5.4.170.0130.06718.86
5.4.160.0030.08319.01
5.4.150.0170.06718.88
5.4.140.0100.07316.39
5.4.130.0070.04716.35
5.4.120.0030.07316.44
5.4.110.0100.07016.47
5.4.100.0030.07316.36
5.4.90.0070.06316.36
5.4.80.0130.06716.45
5.4.70.0100.07316.49
5.4.60.0070.06716.34
5.4.50.0030.07716.36
5.4.40.0030.07316.45
5.4.30.0170.06316.39
5.4.20.0030.06316.32
5.4.10.0100.07016.30
5.4.00.0070.06715.85
5.3.290.0130.07314.66
5.3.280.0130.06014.57
5.3.270.0130.06314.46
5.3.260.0100.07714.43
5.3.250.0100.07714.58
5.3.240.0100.07714.59
5.3.230.0070.07714.54
5.3.220.0100.06714.43
5.3.210.0130.07014.48
5.3.200.0030.06014.43
5.3.190.0070.06014.53
5.3.180.0130.07014.55
5.3.170.0070.07714.57
5.3.160.0070.07714.55
5.3.150.0100.04314.52
5.3.140.0130.07014.54
5.3.130.0070.07314.41
5.3.120.0070.08314.46
5.3.110.0070.05714.40
5.3.100.0000.04713.98
5.3.90.0130.06713.93
5.3.80.0070.07014.00
5.3.70.0030.07313.92
5.3.60.0070.07313.99
5.3.50.0100.06313.90
5.3.40.0130.05313.72
5.3.30.0070.07013.92
5.3.20.0070.07013.59
5.3.10.0100.04313.65
5.3.00.0100.07013.60
5.2.170.0130.06011.83
5.2.160.0100.04011.83
5.2.150.0000.05711.83
5.2.140.0030.06311.83
5.2.130.0030.06311.83
5.2.120.0100.04711.83
5.2.110.0030.03311.83
5.2.100.0100.05711.83
5.2.90.0100.05711.83
5.2.80.0030.06011.83
5.2.70.0000.04011.83
5.2.60.0070.05311.83
5.2.50.0030.05311.83
5.2.40.0100.05011.83
5.2.30.0130.05711.83
5.2.20.0000.06311.83
5.2.10.0100.04711.83
5.2.00.0100.04311.83
5.1.60.0030.04311.83
5.1.50.0070.04311.83
5.1.40.0030.03011.83
5.1.30.0030.05711.83
5.1.20.0100.05011.83
5.1.10.0000.06011.83
5.1.00.0000.03711.83
5.0.50.0030.05011.83
5.0.40.0070.04011.83
5.0.30.0000.06711.83
5.0.20.0100.03711.83
5.0.10.0100.04011.83
5.0.00.0000.06711.83
4.4.90.0070.03011.83
4.4.80.0000.03711.83
4.4.70.0030.03711.83
4.4.60.0030.03011.83
4.4.50.0070.01311.83
4.4.40.0030.04711.83
4.4.30.0000.03711.83
4.4.20.0070.03011.83
4.4.10.0000.03311.83
4.4.00.0000.05311.83
4.3.110.0000.03711.83
4.3.100.0030.03311.83
4.3.90.0030.03311.83
4.3.80.0030.05011.83
4.3.70.0070.03311.83
4.3.60.0000.03711.83
4.3.50.0030.03311.83
4.3.40.0000.05311.83
4.3.30.0000.03011.83
4.3.20.0000.03711.83
4.3.10.0030.03311.83
4.3.00.0000.03311.83

preferences:
48.11 ms | 401 KiB | 5 Q