3v4l.org

run code in 300+ PHP versions simultaneously
<?php $first = [ 'abc' => [] ]; $alias = 'def'; var_dump(array_merge($first, [$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)
8.3.70.0110.00416.50
8.3.60.0070.01116.61
8.3.50.0060.01222.00
8.3.40.0120.00318.54
8.3.30.0120.00318.96
8.3.20.0040.00420.25
8.3.10.0040.00421.77
8.3.00.0120.00019.02
8.2.190.0040.01116.58
8.2.180.0180.00318.29
8.2.170.0060.00922.96
8.2.160.0100.00720.55
8.2.150.0040.00424.18
8.2.140.0030.00624.66
8.2.130.0050.00226.16
8.2.120.0090.00619.54
8.2.110.0100.00019.38
8.2.100.0120.00017.63
8.2.90.0080.00019.05
8.2.80.0080.00017.97
8.2.70.0040.00417.50
8.2.60.0040.00417.92
8.2.50.0000.00918.07
8.2.40.0040.00719.88
8.2.30.0040.00417.91
8.2.20.0070.00017.73
8.2.10.0020.00517.97
8.2.00.0040.00417.52
8.1.280.0110.00625.92
8.1.270.0060.00318.87
8.1.260.0050.00226.35
8.1.250.0040.00428.09
8.1.240.0030.00622.05
8.1.230.0110.00017.42
8.1.220.0000.00717.74
8.1.210.0040.00418.77
8.1.200.0120.00017.22
8.1.190.0000.00817.11
8.1.180.0040.00418.10
8.1.170.0050.00320.43
8.1.160.0000.00721.86
8.1.150.0050.00218.82
8.1.140.0000.00817.34
8.1.130.0070.00017.73
8.1.120.0000.00717.31
8.1.110.0000.00717.40
8.1.100.0040.00417.25
8.1.90.0000.00717.41
8.1.80.0000.00717.34
8.1.70.0040.00417.36
8.1.60.0000.00817.50
8.1.50.0030.00517.45
8.1.40.0040.00417.41
8.1.30.0040.00417.59
8.1.20.0040.00417.57
8.1.10.0070.00017.45
8.1.00.0000.00717.42
8.0.300.0040.00418.77
8.0.290.0000.00716.63
8.0.280.0030.00318.43
8.0.270.0040.00416.62
8.0.260.0000.00817.06
8.0.250.0000.00716.91
8.0.240.0040.00416.82
8.0.230.0000.00716.88
8.0.220.0000.00716.82
8.0.210.0040.00416.71
8.0.200.0000.00716.86
8.0.190.0040.00416.77
8.0.180.0040.00416.90
8.0.170.0070.00016.86
8.0.160.0000.00716.77
8.0.150.0050.00216.73
8.0.140.0070.00016.74
8.0.130.0030.00313.18
8.0.120.0050.00316.80
8.0.110.0040.00416.73
8.0.100.0030.00516.64
8.0.90.0000.00716.61
8.0.80.0100.01016.83
8.0.70.0050.00316.77
8.0.60.0040.00416.62
8.0.50.0050.00216.68
8.0.30.0120.00617.10
8.0.20.0120.01317.40
8.0.10.0040.00416.92
8.0.00.0140.00916.70
7.4.330.0000.00515.03
7.4.320.0000.00616.39
7.4.300.0040.00416.29
7.4.290.0070.00016.53
7.4.280.0030.00616.43
7.4.270.0030.00316.43
7.4.260.0050.00616.48
7.4.250.0000.00816.39
7.4.240.0020.00516.55
7.4.230.0000.00716.57
7.4.220.0110.00716.39
7.4.210.0100.00916.56
7.4.200.0030.00316.64
7.4.160.0040.01316.39
7.4.150.0090.01017.40
7.4.140.0130.00917.86
7.4.130.0160.00316.38
7.4.120.0100.00916.53
7.4.110.0060.01316.37
7.4.100.0060.01216.35
7.4.90.0040.01216.38
7.4.80.0200.00319.39
7.4.70.0090.01016.53
7.4.60.0170.00016.53
7.4.50.0030.00616.48
7.4.40.0070.01116.43
7.4.30.0110.01116.42
7.4.00.0070.00714.73
7.3.330.0000.00612.91
7.3.320.0060.00613.03
7.3.310.0000.00716.16
7.3.300.0000.00716.18
7.3.290.0030.00316.18
7.3.280.0080.00916.19
7.3.270.0030.01417.40
7.3.260.0110.00716.57
7.3.250.0080.01116.21
7.3.240.0100.01016.41
7.3.230.0140.00716.39
7.3.210.0030.01316.20
7.3.200.0090.00919.39
7.3.190.0060.00916.34
7.3.180.0190.00316.22
7.3.170.0060.01316.27
7.3.160.0090.01516.36
7.3.120.0030.01014.70
7.3.110.0000.01614.47
7.3.100.0030.01015.02
7.3.90.0030.01314.71
7.3.80.0060.00714.67
7.3.70.0120.00414.58
7.3.60.0060.00914.80
7.3.50.0090.00614.68
7.3.40.0030.00914.53
7.3.30.0030.00714.70
7.3.20.0040.01116.66
7.3.10.0070.00716.58
7.3.00.0040.00816.57
7.2.330.0090.00916.40
7.2.320.0120.01216.55
7.2.310.0100.00916.39
7.2.300.0130.00316.53
7.2.290.0060.01216.59
7.2.240.0040.01515.10
7.2.230.0060.00914.61
7.2.220.0060.00915.02
7.2.210.0060.00914.77
7.2.200.0000.01614.63
7.2.190.0000.01114.81
7.2.180.0120.00414.92
7.2.170.0030.00614.69
7.2.160.0070.01014.88
7.2.150.0070.00716.98
7.2.140.0030.01016.65
7.2.130.0040.00716.72
7.2.120.0040.01116.83
7.2.110.0110.00616.64
7.2.100.0000.01016.59
7.2.90.0120.00316.48
7.2.80.0070.01016.45
7.2.70.0120.00316.84
7.2.60.0050.00816.89
7.2.50.0100.00616.83
7.2.40.0110.00316.74
7.2.30.0000.01416.86
7.2.20.0070.00716.95
7.2.10.0100.00316.77
7.2.00.0030.01018.05
7.1.330.0080.00615.82
7.1.320.0090.00615.71
7.1.310.0070.00715.64
7.1.300.0030.01415.59
7.1.290.0000.01215.46
7.1.280.0030.01015.37
7.1.270.0040.00715.51
7.1.260.0030.00515.81
7.1.250.0000.01515.70
7.1.200.0030.00715.90
7.1.100.0080.00318.17
7.1.70.0000.00817.26
7.1.60.0100.01419.46
7.1.50.0030.01216.96
7.1.00.0000.07722.48
7.0.200.0030.00316.82
7.0.140.0000.04322.15
7.0.70.4570.04719.88
7.0.60.0000.08719.79
7.0.50.0070.07317.90
7.0.40.0170.07719.98
7.0.30.0270.07320.17
7.0.20.0230.05020.09
7.0.10.0200.09020.18
7.0.00.0130.03020.19
5.6.280.0000.07721.13
5.6.210.0200.06720.55
5.6.200.0070.08318.14
5.6.190.0070.05020.45
5.6.180.0200.03720.38
5.6.170.0270.09020.51
5.6.160.0100.08320.44
5.6.150.0070.08318.17
5.6.140.0030.04018.11
5.6.130.0100.08318.11
5.6.120.0130.07321.00
5.6.110.0100.07320.98
5.6.100.0100.03721.08
5.6.90.0070.08720.89
5.6.80.0130.06320.53
5.6.70.0370.05320.42
5.5.350.0100.03720.40
5.5.340.0170.07018.02
5.5.330.0100.07720.41
5.5.320.0130.07320.21
5.5.310.0270.08020.29
5.5.300.0030.06317.98
5.5.290.0200.06017.91
5.5.280.0100.04720.82
5.5.270.0200.06020.75
5.5.260.0070.08720.75
5.5.250.0170.07320.61
5.5.240.0100.03320.27
5.4.450.0630.07319.14
5.4.440.0030.06319.58
5.4.430.0700.06019.32
5.4.420.0930.05319.51
5.4.410.0300.05319.48
5.4.400.0100.05718.79
5.4.390.0200.06718.52
5.4.380.0070.06718.73
5.4.370.0400.05318.67
5.4.360.0230.06318.72
5.4.350.0100.07718.49
5.4.340.0170.07318.66
5.4.320.0100.06318.62
5.4.310.0130.05318.71
5.4.300.0230.04318.53
5.4.290.0170.05318.46
5.4.280.0030.06318.71
5.4.270.0030.06318.68
5.4.260.0100.05718.67
5.4.250.0170.05318.69
5.4.240.0130.07318.69
5.4.230.0300.05718.63
5.4.220.0370.05018.74
5.4.210.0230.07018.47
5.4.200.0230.05716.43
5.4.190.0200.06018.68
5.4.180.0170.05018.47
5.4.170.0130.05718.54
5.4.160.0200.06018.48
5.4.150.0170.04718.71
5.4.140.0070.05716.17
5.4.130.0170.05016.05
5.4.120.0100.05316.07
5.4.110.0070.05316.30
5.4.100.0170.05316.29
5.4.90.0130.06316.19
5.4.80.0200.04716.30
5.4.70.0300.05316.06
5.4.60.0130.05716.23
5.4.50.0200.04016.01
5.4.40.0130.05016.09
5.4.30.0100.05016.18
5.4.20.0130.05016.09
5.4.10.0200.04316.16
5.4.00.0130.04715.73
5.3.290.0070.06714.59
5.3.280.0000.06314.57
5.3.270.0230.05014.70
5.3.260.0170.05014.55
5.3.250.0200.04314.70
5.3.240.0130.05714.59
5.3.230.0170.05314.50
5.3.220.0030.06014.54
5.3.210.0130.05314.56
5.3.200.0130.06714.66
5.3.190.0170.05014.62
5.3.180.0170.04714.66
5.3.170.0070.06314.54
5.3.160.0230.04314.46
5.3.150.0200.04714.61
5.3.140.0030.06314.54
5.3.130.0130.06314.53
5.3.120.0130.05714.49
5.3.110.0130.05714.60
5.3.100.0170.04713.95
5.3.90.0070.05314.00
5.3.80.0100.05313.93
5.3.70.0130.05013.99
5.3.60.0070.05313.98
5.3.50.0070.05713.88
5.3.40.0130.05013.91
5.3.30.0200.04313.87
5.3.20.0130.04713.65
5.3.10.0130.04713.60
5.3.00.0100.05013.59
5.2.170.0170.03311.10
5.2.160.0070.04311.13
5.2.150.0130.04011.09
5.2.140.0130.04711.09
5.2.130.0130.03711.15
5.2.120.0070.04011.16
5.2.110.0100.04011.06
5.2.100.0130.03711.06
5.2.90.0100.05711.09
5.2.80.0100.04011.13
5.2.70.0070.06011.15
5.2.60.0130.05311.10
5.2.50.0170.03710.93
5.2.40.0170.03010.98
5.2.30.0100.04010.93
5.2.20.0100.04310.92
5.2.10.0070.04010.83
5.2.00.0130.03710.71
5.1.60.0070.03310.00
5.1.50.0130.0309.95
5.1.40.0130.0339.94
5.1.30.0030.04010.33
5.1.20.0030.04010.47
5.1.10.0100.03310.18
5.1.00.0170.02710.13
5.0.50.0070.0278.57
5.0.40.0070.0278.50
5.0.30.0030.0478.24
5.0.20.0030.0308.39
5.0.10.0030.0308.24
5.0.00.0130.0378.25
4.4.90.0030.0235.93
4.4.80.0000.0275.89
4.4.70.0100.0205.86
4.4.60.0100.0175.91
4.4.50.0030.0235.93
4.4.40.0000.0435.92
4.4.30.0000.0275.95
4.4.20.0000.0275.94
4.4.10.0030.0235.92
4.4.00.0030.0335.90
4.3.110.0070.0205.82
4.3.100.0070.0205.80
4.3.90.0030.0275.77
4.3.80.0070.0375.80
4.3.70.0070.0175.82
4.3.60.0030.0235.79
4.3.50.0000.0275.80
4.3.40.0000.0375.75
4.3.30.0070.0204.61
4.3.20.0070.0174.53
4.3.10.0070.0204.48
4.3.00.0100.0276.95

preferences:
47.88 ms | 401 KiB | 5 Q