3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = ['4', 'x' => 5]; // construct with duplicate keys var_dump(['x' => 4, 'x' => 6]); var_dump([2 => 4, 2.0 => 6]); // spread operator leading to duplicate keys var_dump(['x' => 4, ...$arr]); // destruct with duplicate keys ['x' => $a, 'x' => $b] = ['x' => 10]; var_dump([$a, $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)
8.4.120.0120.00724.02
8.4.110.0130.00617.82
8.4.100.0130.00717.67
8.4.90.0060.00317.81
8.4.80.0050.00517.84
8.4.70.0120.00817.86
8.4.60.0070.00618.58
8.4.50.0110.00917.86
8.4.40.0070.01119.41
8.4.30.0130.00620.48
8.4.20.0110.00417.72
8.4.10.0100.00623.88
8.3.250.0130.00518.84
8.3.240.0150.00716.73
8.3.230.0110.00716.16
8.3.220.0110.00717.21
8.3.210.0040.00416.58
8.3.200.0060.00316.41
8.3.190.0100.00818.83
8.3.180.0100.00816.37
8.3.170.0110.00716.79
8.3.160.0040.00416.62
8.3.150.0070.01316.53
8.3.140.0050.00518.81
8.3.130.0060.00318.29
8.3.120.0130.00618.67
8.3.110.0100.01020.94
8.3.100.0090.00024.06
8.3.90.0080.00026.77
8.3.80.0090.00018.18
8.3.70.0140.00716.63
8.3.60.0090.00918.30
8.3.50.0030.01019.87
8.3.40.0070.00720.37
8.3.30.0120.00318.67
8.3.20.0000.00724.18
8.3.10.0070.00024.66
8.3.00.0030.00526.16
8.2.290.0070.01220.50
8.2.280.0060.01318.55
8.2.270.0070.00718.64
8.2.260.0130.00316.95
8.2.250.0040.01217.02
8.2.240.0030.00517.37
8.2.230.0040.00422.58
8.2.220.0090.00037.54
8.2.210.0110.00426.77
8.2.200.0030.00616.75
8.2.190.0070.01118.16
8.2.180.0090.00625.92
8.2.170.0070.01518.67
8.2.160.0100.00322.96
8.2.150.0080.00025.66
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0080.00021.07
8.2.110.0060.00321.06
8.2.100.0040.00817.59
8.2.90.0050.00319.23
8.2.80.0040.00417.97
8.2.70.0000.00817.50
8.2.60.0060.00318.03
8.2.50.0050.00318.07
8.2.40.0000.00918.14
8.2.30.0030.00618.18
8.2.20.0070.00019.31
8.2.10.0000.00818.00
8.2.00.0040.00419.25
8.1.330.0130.00621.80
8.1.320.0140.00516.04
8.1.310.0070.01016.63
8.1.300.0130.00620.34
8.1.290.0060.00630.84
8.1.280.0090.00625.92
8.1.270.0050.00520.65
8.1.260.0030.00526.35
8.1.250.0050.00328.09
8.1.240.0060.00322.05
8.1.230.0080.00418.82
8.1.220.0040.00417.79
8.1.210.0030.00518.77
8.1.200.0050.00717.35
8.1.190.0060.00317.35
8.1.180.0040.00419.31
8.1.170.0000.00818.56
8.1.160.0050.00318.86
8.1.150.0060.00618.52
8.1.140.0080.00017.36
8.1.130.0000.00717.46
8.1.120.0040.00717.42
8.1.110.0000.01617.32
8.1.100.0130.00317.30
8.1.90.0090.00517.46
8.1.80.0140.00217.45
8.1.70.0110.00517.43
8.1.60.0130.00517.55
8.1.50.0110.00717.50
8.1.40.0110.00717.45
8.1.30.0140.00617.52
8.1.20.0170.00317.57
8.1.10.0180.00017.50
8.1.00.0200.00117.54
8.0.300.0000.00718.77
8.0.290.0040.00416.63
8.0.280.0000.00818.40
8.0.270.0000.00817.99
8.0.260.0000.00716.80
8.0.250.0060.00916.87
8.0.240.0110.00516.87
8.0.230.0130.00416.94
8.0.220.0100.00516.79
8.0.210.0130.00216.94
8.0.200.0160.00017.01
8.0.190.0110.00417.00
8.0.180.0130.00216.79
8.0.170.0110.00416.85
8.0.160.0150.00016.80
8.0.150.0080.00816.75
8.0.140.0110.00416.86
8.0.130.0120.00416.85
8.0.120.0130.00316.96
8.0.110.0150.00016.96
8.0.100.0050.01016.91
8.0.90.0090.00616.82
8.0.80.0150.00016.79
8.0.70.0130.00316.82
8.0.60.0160.00016.91
8.0.50.0100.00516.95
8.0.30.0160.00016.71
8.0.20.0160.00017.00
8.0.10.0120.00317.01
7.4.330.0000.00515.55
7.4.320.0060.01016.57
7.4.300.0160.00016.43
7.4.290.0170.00016.42
7.4.280.0130.00316.40
7.4.270.0170.00016.46
7.4.260.0030.01216.40
7.4.250.0070.00716.64
7.4.240.0100.00516.49
7.4.230.0150.00016.44
7.4.220.0140.00016.55
7.4.210.0080.00816.45
7.4.200.0150.00016.38
7.4.190.0110.00416.55
7.4.180.0120.00216.46
7.4.160.0100.00516.66
7.4.150.0150.00016.52
7.4.140.0100.00516.36
7.4.130.0130.00316.54
7.4.120.0160.00016.44
7.4.110.0120.00316.45
7.4.100.0120.00316.52
7.4.90.0130.00016.48
7.4.80.0050.00916.32
7.4.70.0090.00316.50
7.4.60.0090.00216.36
7.4.50.0040.00416.29
7.4.40.0000.00816.29
7.4.30.0000.00816.53
7.4.20.0040.00416.36
7.4.10.0050.00316.36
7.4.00.0000.00816.48

preferences:
29.46 ms | 403 KiB | 5 Q