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)
8.3.70.0140.00716.63
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
8.2.190.0070.01118.16
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
8.1.280.0090.00625.92
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:
28.89 ms | 401 KiB | 5 Q