3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arrayFirst = [ "index" => [ 'a' => '1', ], [ 'a' => '2', ] ]; $arraySecond = [ "index" => [ 'b' => '1', ], [ 'b' => '2', ] ]; foreach ($arrayFirst as $k => &$row) { $row = array_merge($row, $arraySecond[$k]); } var_export($arrayFirst);

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)
8.3.70.0090.00616.58
8.3.60.0140.00316.50
8.3.50.0100.01018.26
8.3.40.0100.01020.48
8.3.30.0100.00718.59
8.3.20.0080.00024.18
8.3.10.0030.00624.66
8.3.00.0040.00426.16
8.2.190.0070.01116.58
8.2.180.0060.01525.92
8.2.170.0070.01119.08
8.2.160.0100.00322.96
8.2.150.0080.00025.66
8.2.140.0000.00824.66
8.2.130.0030.00526.16
8.2.120.0000.00826.16
8.2.110.0070.00320.42
8.2.100.0110.00717.61
8.2.90.0090.00019.17
8.2.80.0100.00017.97
8.2.70.0040.00417.63
8.2.60.0040.00417.93
8.2.50.0050.00318.07
8.2.40.0040.00417.96
8.2.30.0040.00417.93
8.2.20.0070.00019.29
8.2.10.0040.00418.11
8.2.00.0070.00019.30
8.1.280.0110.00425.92
8.1.270.0080.00024.66
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0000.00823.92
8.1.230.0080.00417.91
8.1.220.0040.00417.76
8.1.210.0000.00818.77
8.1.200.0090.00017.35
8.1.190.0030.00617.35
8.1.180.0040.00418.10
8.1.170.0060.00318.62
8.1.160.0000.00718.80
8.1.150.0050.00218.63
8.1.140.0000.00817.44
8.1.130.0070.00018.94
8.1.120.0000.00817.52
8.1.110.0000.00817.36
8.1.100.0120.00317.26
8.1.90.0050.01017.28
8.1.80.0090.00617.37
8.1.70.0110.00417.38
8.1.60.0140.00317.46
8.1.50.0110.00917.48
8.1.40.0110.00717.45
8.1.30.0090.00517.46
8.1.20.0090.00517.68
8.1.10.0130.00017.49
8.1.00.0180.00017.29
8.0.300.0090.00018.77
8.0.290.0050.00216.75
8.0.280.0000.00818.40
8.0.270.0030.00518.03
8.0.260.0060.00018.43
8.0.250.0070.00016.86
8.0.240.0060.00316.88
8.0.230.0090.00616.80
8.0.220.0120.00316.88
8.0.210.0090.00716.75
8.0.200.0150.00016.93
8.0.190.0090.00416.68
8.0.180.0090.00616.89
8.0.170.0140.00016.91
8.0.160.0130.00016.74
8.0.150.0130.00316.82
8.0.140.0120.00316.69
8.0.130.0110.00316.81
8.0.120.0030.01016.66
8.0.110.0060.00916.84
8.0.100.0080.00816.80
8.0.90.0150.00016.67
8.0.80.0130.00216.88
8.0.70.0150.00016.78
8.0.60.0100.00516.86
8.0.50.0150.00016.66
8.0.30.0070.00716.75
8.0.20.0110.00416.75
8.0.10.0120.00316.88
7.4.330.0030.00315.55
7.4.320.0000.00716.47
7.4.300.0150.00416.52
7.4.290.0030.00316.48
7.4.280.0180.00016.31
7.4.270.0170.00016.33
7.4.260.0070.00716.57
7.4.250.0070.00416.60
7.4.240.0030.01116.48
7.4.230.0130.00316.61
7.4.220.0140.00016.57
7.4.210.0160.00016.29
7.4.200.0110.00316.55
7.4.190.0110.00416.51
7.4.180.0080.00816.50
7.4.160.0160.00016.63
7.4.150.0160.00016.48
7.4.140.0110.00416.31
7.4.130.0140.00016.37
7.4.120.0150.00016.35
7.4.110.0050.00916.28
7.4.100.0070.00716.41
7.4.90.0150.00016.41
7.4.80.0070.00716.35
7.4.70.0150.00016.30
7.4.60.0110.00416.28
7.4.50.0100.00516.29
7.4.40.0150.00016.34
7.4.30.0090.00516.18
7.4.20.0040.01116.45
7.4.10.0130.00016.33
7.4.00.0070.00716.39

preferences:
35.68 ms | 401 KiB | 5 Q