3v4l.org

run code in 300+ PHP versions simultaneously
<?php $first = [ 'abc' => [] ]; $alias = '30000'; var_dump(array_merge($first, array($alias => [])));

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)
8.3.60.0150.00618.30
8.3.50.0110.00722.05
8.3.40.0110.00418.71
8.3.30.0140.00018.77
8.3.20.0050.00320.30
8.3.10.0000.00821.60
8.3.00.0040.00719.13
8.2.180.0180.00418.54
8.2.170.0040.01122.96
8.2.160.0090.00920.35
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0110.00419.54
8.2.110.0070.00321.06
8.2.100.0090.00317.50
8.2.90.0040.00419.17
8.2.80.0030.00617.97
8.2.70.0070.00317.50
8.2.60.0040.00418.04
8.2.50.0000.00818.07
8.2.40.0060.00318.02
8.2.30.0040.00418.04
8.2.20.0040.00417.73
8.2.10.0000.00817.86
8.2.00.0080.00017.59
8.1.280.0100.01025.92
8.1.270.0060.00318.87
8.1.260.0040.00426.35
8.1.250.0060.00328.09
8.1.240.0060.00322.05
8.1.230.0040.00719.02
8.1.220.0040.00417.74
8.1.210.0030.00618.77
8.1.200.0030.00616.88
8.1.190.0040.00417.10
8.1.180.0050.00318.10
8.1.170.0000.00820.37
8.1.160.0050.00221.95
8.1.150.0000.00718.86
8.1.140.0000.00717.46
8.1.130.0000.00817.86
8.1.120.0000.00817.38
8.1.110.0050.00217.40
8.1.100.0040.00417.39
8.1.90.0000.00717.41
8.1.80.0000.00717.39
8.1.70.0050.00317.37
8.1.60.0060.00317.56
8.1.50.0080.00017.33
8.1.40.0030.00617.41
8.1.30.0040.00417.51
8.1.20.0040.00417.49
8.1.10.0040.00417.41
8.1.00.0040.00417.48
8.0.300.0000.00718.77
8.0.290.0070.00016.63
8.0.280.0000.00718.29
8.0.270.0040.00417.23
8.0.260.0000.00717.20
8.0.250.0040.00416.88
8.0.240.0060.00016.78
8.0.230.0030.00316.88
8.0.220.0000.00716.81
8.0.210.0030.00316.84
8.0.200.0030.00316.90
8.0.190.0030.00616.79
8.0.180.0050.00216.78
8.0.170.0030.00316.71
8.0.160.0000.00716.71
8.0.150.0030.00516.72
8.0.140.0040.00416.69
8.0.130.0030.00313.26
8.0.120.0000.00816.82
8.0.110.0040.00316.78
8.0.100.0000.00716.89
8.0.90.0040.00416.70
8.0.80.0060.01616.70
8.0.70.0050.00316.80
8.0.60.0000.00716.69
8.0.50.0040.00416.71
8.0.30.0100.00817.03
8.0.20.0100.01017.40
8.0.10.0030.00316.84
8.0.00.0100.00916.51
7.4.330.0050.00015.03
7.4.320.0000.00616.44
7.4.300.0090.00016.57
7.4.290.0060.00316.42
7.4.280.0040.00416.32
7.4.270.0030.00316.36
7.4.260.0000.00816.32
7.4.250.0000.00716.49
7.4.240.0020.00616.42
7.4.230.0030.00316.32
7.4.220.0130.01216.43
7.4.210.0040.01016.41
7.4.200.0030.00316.42
7.4.160.0110.00616.51
7.4.150.0100.01017.40
7.4.140.0080.01217.86
7.4.130.0080.00916.45
7.4.120.0110.00716.51
7.4.110.0060.01216.53
7.4.100.0100.00716.33
7.4.90.0070.01016.38
7.4.80.0060.01019.39
7.4.70.0070.01016.36
7.4.60.0070.00716.38
7.4.50.0030.00316.51
7.4.40.0090.01216.55
7.4.30.0140.00716.13
7.4.00.0050.01315.00
7.3.330.0000.00813.12
7.3.320.0060.00613.07
7.3.310.0000.00716.18
7.3.300.0000.00616.08
7.3.290.0000.00716.04
7.3.280.0070.00816.20
7.3.270.0120.00617.40
7.3.260.0030.01416.50
7.3.250.0110.00616.30
7.3.240.0080.01216.24
7.3.230.0090.00916.39
7.3.210.0130.00316.50
7.3.200.0120.00919.39
7.3.190.0130.00316.36
7.3.180.0190.00316.20
7.3.170.0030.01916.27
7.3.160.0140.01016.34
7.3.120.0100.00314.97
7.3.110.0110.00714.65
7.3.100.0060.00614.55
7.3.90.0030.01014.95
7.3.80.0060.00614.86
7.3.70.0000.00914.63
7.3.60.0030.01314.53
7.3.50.0040.00414.63
7.3.40.0070.00714.84
7.3.30.0040.00414.54
7.3.20.0030.00616.56
7.3.10.0060.00616.51
7.3.00.0040.01116.51
7.2.330.0110.00516.61
7.2.320.0140.00616.54
7.2.310.0090.00916.32
7.2.300.0060.01016.44
7.2.290.0030.01516.39
7.2.250.0110.00715.04
7.2.240.0070.01014.98
7.2.230.0000.01114.84
7.2.220.0100.00314.59
7.2.210.0000.00914.98
7.2.200.0090.00614.93
7.2.190.0060.00614.46
7.2.180.0070.00714.98
7.2.170.0030.01014.98
7.2.60.0060.00916.62
7.2.00.0040.00819.00
7.1.330.0030.01316.02
7.1.320.0070.00415.85
7.1.310.0060.00915.86
7.1.300.0060.00915.67
7.1.290.0100.00315.82
7.1.280.0000.01415.45
7.1.270.0130.00015.63
7.1.260.0100.00315.78
7.1.200.0030.01015.68
7.1.100.0000.01118.00
7.1.70.0000.00817.13
7.1.60.0100.01019.46
7.1.50.0070.00716.59
7.1.00.0000.07722.32
7.0.200.0040.00416.41
7.0.140.0000.05022.07
7.0.70.3530.03719.86
7.0.60.0070.06719.92
7.0.50.0000.04717.71
7.0.40.0070.04319.89
7.0.30.0270.08020.21
7.0.20.0300.08020.13
7.0.10.0230.05020.13
7.0.00.0100.08020.19
5.6.280.0030.06720.81
5.6.210.0100.08020.70
5.6.200.0230.07018.22
5.6.190.0070.05320.34
5.6.180.0270.04020.46
5.6.170.0400.07720.54
5.6.160.0100.06020.70
5.6.150.0030.04018.15
5.6.140.0070.07318.18
5.6.130.0070.07718.20
5.6.120.0070.05321.08
5.6.110.0100.07020.97
5.6.100.0000.04321.03
5.6.90.0170.06321.07
5.6.80.0070.05320.47
5.6.70.0130.08320.49
5.5.350.0070.05720.40
5.5.340.0130.07018.01
5.5.330.0070.08720.19
5.5.320.0030.05320.36
5.5.310.0230.07320.12
5.5.300.0130.07317.95
5.5.290.0100.08018.00
5.5.280.0070.03720.64
5.5.270.0100.07720.67
5.5.260.0100.03720.94
5.5.250.0100.07320.57
5.5.240.0130.07320.06
5.4.450.0200.05319.32
5.4.440.0870.05719.63
5.4.430.0730.06319.58
5.4.420.0870.05319.44
5.4.410.0870.05719.12
5.4.400.0200.05718.51
5.4.390.0170.05718.63
5.4.380.0100.06018.50
5.4.370.0170.05318.73
5.4.360.0070.05718.57
5.4.350.0070.05718.70
5.4.340.0100.05718.56
5.4.320.0070.06018.69
5.4.310.0100.06318.65
5.4.300.0170.05018.46
5.4.290.0270.04718.68
5.4.280.0100.05718.71
5.4.270.0100.05718.60
5.4.260.0130.05018.58
5.4.250.0130.05718.46
5.4.240.0230.04318.64
5.4.230.0200.04318.68
5.4.220.0130.05318.61
5.4.210.0070.05718.49
5.4.200.0170.04716.51
5.4.190.0200.04318.68
5.4.180.0070.06018.76
5.4.170.0200.04718.59
5.4.160.0130.05018.55
5.4.150.0130.05318.54
5.4.140.0170.04716.25
5.4.130.0200.04016.35
5.4.120.0070.05716.35
5.4.110.0070.05316.30
5.4.100.0100.05316.16
5.4.90.0130.05016.16
5.4.80.0270.04016.18
5.4.70.0170.06016.14
5.4.60.0130.04716.13
5.4.50.0170.04316.16
5.4.40.0100.05316.27
5.4.30.0070.05316.32
5.4.20.0130.05316.16
5.4.10.0270.03716.21
5.4.00.0130.05315.76
5.3.290.0130.05314.65
5.3.280.0070.06314.49
5.3.270.0100.05714.52
5.3.260.0100.05714.66
5.3.250.0100.05714.61
5.3.240.0130.05014.61
5.3.230.0130.05014.63
5.3.220.0200.04314.57
5.3.210.0200.04714.48
5.3.200.0100.05314.66
5.3.190.0170.04714.62
5.3.180.0170.04714.65
5.3.170.0130.05014.54
5.3.160.0230.04014.60
5.3.150.0130.05314.66
5.3.140.0100.05014.50
5.3.130.0170.05314.50
5.3.120.0070.05714.53
5.3.110.0200.04314.55
5.3.100.0100.05314.14
5.3.90.0100.05314.03
5.3.80.0200.04313.93
5.3.70.0070.05713.96
5.3.60.0200.04314.09
5.3.50.0130.05013.85
5.3.40.0200.04313.86
5.3.30.0100.05013.88
5.3.20.0200.04013.76
5.3.10.0100.05013.63
5.3.00.0200.04013.57
5.2.170.0070.04311.20
5.2.160.0100.04011.07
5.2.150.0070.04311.21
5.2.140.0030.04711.27
5.2.130.0130.03311.05
5.2.120.0070.04311.09
5.2.110.0070.04311.25
5.2.100.0030.04711.06
5.2.90.0130.04011.16
5.2.80.0100.04011.15
5.2.70.0070.04311.24
5.2.60.0130.06010.97
5.2.50.0130.03710.99
5.2.40.0100.05710.87
5.2.30.0100.04010.96
5.2.20.0130.03310.98
5.2.10.0070.04010.85
5.2.00.0100.03710.81
5.1.60.0030.04010.02
5.1.50.0170.0279.95
5.1.40.0130.03310.09
5.1.30.0000.04310.39
5.1.20.0130.03010.46
5.1.10.0130.03010.13
5.1.00.0100.03310.08
5.0.50.0070.0378.59
5.0.40.0030.0308.44
5.0.30.0100.0508.20
5.0.20.0070.0278.29
5.0.10.0030.0308.27
5.0.00.0030.0438.34
4.4.90.0030.0235.86
4.4.80.0030.0235.92
4.4.70.0070.0205.85
4.4.60.0000.0235.87
4.4.50.0100.0175.89
4.4.40.0070.0305.85
4.4.30.0130.0205.92
4.4.20.0170.0205.93
4.4.10.0070.0205.94
4.4.00.0070.0305.94
4.3.110.0100.0175.84
4.3.100.0030.0235.75
4.3.90.0030.0235.84
4.3.80.0000.0375.82
4.3.70.0030.0205.79
4.3.60.0030.0235.82
4.3.50.0030.0235.79
4.3.40.0030.0335.73
4.3.30.0000.0234.57
4.3.20.0000.0234.61
4.3.10.0070.0174.48
4.3.00.0130.0206.96

preferences:
50.1 ms | 401 KiB | 5 Q