3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = $r = $m = []; $a[1] = ['1','2','3']; $a[2] = ['4','5','6']; foreach ($a as $p) { $r = array_merge($r, $p); } var_dump($r); var_dump(array_map('array_merge', $a, [$r]));

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)
8.3.70.0120.00616.66
8.3.60.0110.00716.61
8.3.50.0120.00621.17
8.3.40.0120.00318.76
8.3.30.0070.00718.84
8.3.20.0040.00420.20
8.3.10.0060.00321.86
8.3.00.0040.00423.70
8.2.190.0160.00316.84
8.2.180.0090.01216.75
8.2.170.0040.01122.96
8.2.160.0100.00320.52
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0090.00019.76
8.2.120.0040.00426.35
8.2.110.0090.00022.21
8.2.100.0080.00418.05
8.2.90.0000.00819.36
8.2.80.0060.00318.16
8.2.70.0000.00917.38
8.2.60.0030.00518.04
8.2.50.0040.00418.07
8.2.40.0040.00422.32
8.2.30.0070.00019.47
8.2.20.0070.00017.79
8.2.10.0070.00018.05
8.2.00.0040.00418.25
8.1.280.0110.01125.92
8.1.270.0050.00523.97
8.1.260.0000.00728.09
8.1.250.0060.00328.09
8.1.240.0000.00923.98
8.1.230.0070.00419.15
8.1.220.0000.00817.74
8.1.210.0040.00418.77
8.1.200.0080.00017.35
8.1.190.0060.00317.35
8.1.180.0000.00818.10
8.1.170.0000.00818.50
8.1.160.0000.00820.70
8.1.150.0000.00818.77
8.1.140.0050.00319.51
8.1.130.0040.00417.61
8.1.120.0050.00217.52
8.1.110.0080.00317.44
8.1.100.0080.00017.51
8.1.90.0000.00717.48
8.1.80.0040.00417.34
8.1.70.0000.00717.49
8.1.60.0030.00617.62
8.1.50.0080.00017.42
8.1.40.0000.00817.44
8.1.30.0050.00317.55
8.1.20.0070.00017.67
8.1.10.0000.00817.40
8.1.00.0040.00417.40
8.0.300.0080.00018.77
8.0.290.0020.00516.75
8.0.280.0030.00318.30
8.0.270.0030.00517.27
8.0.260.0060.00017.25
8.0.250.0000.00716.95
8.0.240.0020.00517.02
8.0.230.0070.00017.08
8.0.220.0030.00316.92
8.0.210.0030.00616.98
8.0.200.0030.00317.00
8.0.190.0000.00716.91
8.0.180.0030.00517.00
8.0.170.0040.00416.98
8.0.160.0080.00017.03
8.0.150.0070.00016.78
8.0.140.0000.00816.95
8.0.130.0000.00513.37
8.0.120.0030.00616.81
8.0.110.0030.00516.92
8.0.100.0000.00717.07
8.0.90.0050.00316.93
8.0.80.0060.01516.94
8.0.70.0040.00416.86
8.0.60.0050.00216.91
8.0.50.0000.00716.74
8.0.30.0110.00817.22
8.0.20.0160.01017.40
8.0.10.0040.00417.12
8.0.00.0150.00516.86
7.4.330.0030.00315.08
7.4.320.0030.00316.59
7.4.300.0030.00316.40
7.4.290.0000.00716.50
7.4.280.0060.00316.59
7.4.270.0000.00716.50
7.4.260.0030.00716.45
7.4.250.0040.00416.59
7.4.240.0020.00516.49
7.4.230.0000.00816.47
7.4.220.0100.01616.59
7.4.210.0080.00716.50
7.4.200.0000.00716.66
7.4.160.0140.00316.53
7.4.150.0090.01617.40
7.4.140.0130.00917.86
7.4.130.0070.01116.43
7.4.120.0180.00116.43
7.4.110.0100.00716.69
7.4.100.0140.00416.51
7.4.90.0100.00816.62
7.4.80.0060.01219.39
7.4.70.0140.00816.57
7.4.60.0130.00316.49
7.4.50.0030.00916.68
7.4.40.0140.01016.58
7.4.30.0060.01316.77
7.4.00.0040.01114.80
7.3.330.0020.00213.18
7.3.320.0000.00613.22
7.3.310.0000.00716.39
7.3.300.0030.00316.38
7.3.290.0030.00316.41
7.3.280.0070.01016.42
7.3.270.0030.01617.40
7.3.260.0110.00516.43
7.3.240.0090.00916.45
7.3.230.0180.00016.39
7.3.210.0090.00916.27
7.3.200.0070.01519.39
7.3.190.0150.00716.45
7.3.180.0120.00516.51
7.3.170.0080.00816.54
7.3.160.0120.00616.34
7.3.10.0050.01016.71
7.3.00.0060.00916.50
7.2.330.0090.00916.44
7.2.320.0090.01616.81
7.2.310.0150.00316.41
7.2.300.0090.00916.77
7.2.290.0140.00516.37
7.2.130.0100.00616.78
7.2.120.0170.00316.72
7.2.110.0090.00416.88
7.2.100.0050.00716.62
7.2.90.0150.00116.81
7.2.80.0090.00816.94
7.2.70.0090.00916.72
7.2.60.0100.00716.81
7.2.50.0110.01116.71
7.2.40.0120.00716.75
7.2.30.0110.00516.74
7.2.20.0110.00516.67
7.2.10.0130.00916.93
7.2.00.0080.00917.62
7.1.250.0060.00815.75
7.1.200.0080.00815.86
7.1.100.0030.01318.39
7.1.70.0050.00517.26
7.1.60.0070.01819.30
7.1.50.0170.00716.98
7.1.00.0000.08022.35
7.0.200.0000.00816.70
7.0.60.0030.06021.72
7.0.50.0100.04317.82
7.0.40.0100.08320.21
7.0.30.0270.05020.00
7.0.20.0270.07020.21
7.0.10.0030.04320.18
7.0.00.0100.06320.11
5.6.280.0030.05321.10
5.6.210.0100.06320.71
5.6.200.0170.07018.12
5.6.190.0170.03020.44
5.6.180.0430.04720.43
5.6.170.0230.08020.33
5.6.160.0030.04320.48
5.6.150.0170.07318.21
5.6.140.0000.06718.07
5.6.130.0100.08718.22
5.6.120.0170.07321.14
5.6.110.0100.08020.97
5.6.100.0070.09020.99
5.6.90.0100.09021.10
5.6.80.0100.08020.50
5.5.350.0300.07020.40
5.5.340.0130.06717.91
5.5.330.0070.04720.40
5.5.320.0300.07720.18
5.5.310.0300.07720.20
5.5.300.0030.04017.89
5.5.290.0070.04017.97
5.5.280.0100.07720.88
5.5.270.0070.09020.83
5.5.260.0130.07020.72
5.5.250.0170.06720.79
5.5.240.0130.06720.18

preferences:
50.36 ms | 401 KiB | 5 Q