3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( array_merge( array('a' => 1), array('b' => 2), array('a' => 2, 'c' => 3)));

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)
8.3.40.0110.00418.73
8.3.30.0070.00718.85
8.3.20.0040.00420.35
8.3.10.0070.00021.69
8.3.00.0040.00417.34
8.2.170.0090.00622.96
8.2.160.0070.01020.38
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0050.00326.16
8.2.120.0080.00021.15
8.2.110.0000.00820.36
8.2.100.0040.00717.59
8.2.90.0060.00617.78
8.2.80.0030.00517.97
8.2.70.0000.00817.50
8.2.60.0030.00617.80
8.2.50.0080.00018.07
8.2.40.0020.00517.91
8.2.30.0000.00717.84
8.2.20.0040.00417.64
8.2.10.0040.00417.97
8.2.00.0050.00217.43
8.1.270.0030.00623.84
8.1.260.0060.00326.35
8.1.250.0070.00028.09
8.1.240.0070.00324.00
8.1.230.0070.00320.88
8.1.220.0000.00817.74
8.1.210.0000.00818.83
8.1.200.0030.00617.09
8.1.190.0040.00417.10
8.1.180.0040.00418.10
8.1.170.0040.00418.56
8.1.160.0040.00421.89
8.1.150.0050.00318.74
8.1.140.0040.00417.21
8.1.130.0030.00317.77
8.1.120.0040.00417.40
8.1.110.0000.00817.34
8.1.100.0000.00717.38
8.1.90.0030.00317.22
8.1.80.0040.00417.33
8.1.70.0040.00417.33
8.1.60.0000.00817.47
8.1.50.0050.00317.30
8.1.40.0030.00617.24
8.1.30.0040.00417.51
8.1.20.0040.00417.39
8.1.10.0000.00717.29
8.1.00.0040.00417.31
8.0.300.0040.00419.86
8.0.290.0000.00716.58
8.0.280.0040.00418.31
8.0.270.0030.00317.08
8.0.260.0000.00617.00
8.0.250.0000.00616.78
8.0.240.0030.00316.82
8.0.230.0000.01016.79
8.0.220.0000.00716.74
8.0.210.0030.00616.71
8.0.200.0030.00316.84
8.0.190.0000.00816.71
8.0.180.0040.00416.79
8.0.170.0030.00516.70
8.0.160.0000.00816.81
8.0.150.0060.00316.67
8.0.140.0050.00516.66
8.0.130.0000.00613.28
8.0.120.0060.00316.73
8.0.110.0040.00416.63
8.0.100.0040.00416.78
8.0.90.0000.00716.78
8.0.80.0060.00916.84
8.0.70.0000.00716.67
8.0.60.0000.00816.56
8.0.50.0030.00316.88
8.0.30.0140.00516.94
8.0.20.0060.01217.40
8.0.10.0070.00016.71
8.0.00.0110.00716.60
7.4.330.0050.00015.07
7.4.320.0000.00616.52
7.4.300.0000.00616.48
7.4.290.0000.00616.29
7.4.280.0040.00416.38
7.4.270.0000.00716.52
7.4.260.0030.00316.34
7.4.250.0030.00516.29
7.4.240.0020.00516.31
7.4.230.0040.00416.40
7.4.220.0100.00716.39
7.4.210.0060.00916.29
7.4.200.0000.00716.54
7.4.160.0100.00616.34
7.4.150.0090.01317.40
7.4.140.0110.00717.86
7.4.130.0090.00816.45
7.4.120.0120.00516.40
7.4.110.0140.00316.20
7.4.100.0120.00816.22
7.4.90.0090.00916.45
7.4.80.0090.00919.39
7.4.70.0110.01316.35
7.4.60.0070.01016.28
7.4.50.0000.00516.27
7.4.40.0100.00716.36
7.4.30.0120.00916.42
7.4.00.0120.00314.89
7.3.330.0030.00312.88
7.3.320.0050.00013.04
7.3.310.0030.00316.08
7.3.300.0030.00316.09
7.3.290.0100.01016.12
7.3.280.0100.00816.16
7.3.270.0140.00417.40
7.3.260.0150.00316.16
7.3.250.0110.01016.14
7.3.240.0160.00616.12
7.3.230.0100.00516.39
7.3.210.0110.00816.15
7.3.200.0070.01019.39
7.3.190.0030.01716.18
7.3.180.0060.00916.35
7.3.170.0110.00416.27
7.3.160.0090.00916.25
7.2.330.0070.01016.24
7.2.320.0070.01016.36
7.2.310.0030.01316.32
7.2.300.0160.00316.39
7.2.290.0080.00816.47
7.2.80.0060.00616.38
7.2.60.0070.00716.72
7.2.00.0030.00818.90
7.1.200.0170.00315.80
7.1.100.0040.00718.07
7.1.70.0070.00317.07
7.1.60.0070.01719.40
7.1.50.0030.01716.94
7.1.00.0030.07722.31
7.0.200.0000.00816.29
7.0.140.0030.07021.95
7.0.60.0170.07319.74
7.0.50.0100.03317.81
7.0.40.0100.08320.02
7.0.30.0600.05020.13
7.0.20.0200.08720.04
7.0.10.0000.06320.09
7.0.00.0030.04320.18
5.6.280.0000.07721.11
5.6.210.0000.04720.76
5.6.200.0030.04018.18
5.6.190.0030.05020.62
5.6.180.0200.05020.77
5.6.170.0370.07320.42
5.6.160.0030.05320.40
5.6.150.0130.06318.15
5.6.140.0100.08018.21
5.6.130.0030.04718.14
5.6.120.0070.05020.99
5.6.110.0030.04021.07
5.6.100.0070.08321.00
5.6.90.0070.05021.11
5.6.80.0100.07320.36
5.6.70.1930.03720.51
5.5.350.0200.04020.41
5.5.340.0000.04317.99
5.5.330.0070.06020.21
5.5.320.0270.04320.14
5.5.310.0400.05720.29
5.5.300.0030.03717.95
5.5.290.0000.07717.92
5.5.280.0030.04020.73
5.5.270.0130.05720.75
5.5.260.0130.07320.95
5.5.250.0030.08320.77
5.5.240.0270.07320.25
5.4.450.0830.05319.47
5.4.440.0770.05019.58
5.4.430.0800.06019.21
5.4.420.0100.05719.42
5.4.410.0100.05719.39
5.4.400.0700.06318.77
5.4.390.0870.07318.61
5.4.380.0500.05718.74
5.4.370.0230.05018.68
5.4.360.0200.06018.70
5.4.350.0090.03611.97
5.4.340.0060.03611.96
5.4.320.0080.03512.45
5.4.310.0070.04212.45
5.4.300.0340.08412.45
5.4.290.0180.05312.45
5.4.280.0080.04812.34
5.4.270.0090.03812.34
5.4.260.0070.03612.34
5.4.250.0060.03912.35
5.4.240.0050.03712.35
5.4.230.0070.04012.34
5.4.220.0080.04312.34
5.4.210.0060.03712.34
5.4.200.0030.04212.34
5.4.190.0100.03312.33
5.4.180.0070.03612.34
5.4.170.0040.04412.34
5.4.160.0100.03812.34
5.4.150.0070.04312.34
5.4.140.0060.03912.02
5.4.130.0070.04112.01
5.4.120.0050.04011.97
5.4.110.0070.04711.96
5.4.100.0070.03611.96
5.4.90.0020.04611.96
5.4.80.0040.04011.96
5.4.70.0080.03311.96
5.4.60.0000.04311.96
5.4.50.0070.03611.96
5.4.40.0060.03611.95
5.4.30.0030.04211.95
5.4.20.0080.04511.95
5.4.10.0080.04111.95
5.4.00.0090.04211.43
5.3.290.0050.04012.80
5.3.280.0060.04012.70
5.3.270.0090.05112.73
5.3.260.0120.05012.72
5.3.250.0090.04712.72
5.3.240.0100.04212.72
5.3.230.0020.04612.71
5.3.220.0040.04212.68
5.3.210.0040.04212.68
5.3.200.0050.04212.68
5.3.190.0100.04212.68
5.3.180.0110.03412.67
5.3.170.0060.03812.67
5.3.160.0080.04212.67
5.3.150.0120.04212.67
5.3.140.0120.03212.66
5.3.130.0060.04112.66
5.3.120.0110.03812.66
5.3.110.0050.04212.66
5.3.100.0090.04812.12
5.3.90.0040.04112.08
5.3.80.0110.03912.08
5.3.70.0140.04512.07
5.3.60.0070.05512.06
5.3.50.0110.05212.00
5.3.40.0110.05112.00
5.3.30.0090.04911.95
5.3.20.0120.04811.72
5.3.10.0060.03611.69
5.3.00.0100.03611.67
5.2.170.0080.0369.18
5.2.160.0080.0429.18
5.2.150.0130.0429.18
5.2.140.0080.0409.18
5.2.130.0100.0399.13
5.2.120.0060.0519.14
5.2.110.0070.0399.14
5.2.100.0080.0549.14
5.2.90.0050.0389.14
5.2.80.0060.0329.13
5.2.70.0090.0299.13
5.2.60.0050.0369.08
5.2.50.0060.0329.05
5.2.40.0060.0289.03
5.2.30.0060.0369.00
5.2.20.0090.0299.00
5.2.10.0040.0318.91
5.2.00.0050.0358.78
5.1.60.0040.0258.06
5.1.50.0120.0348.06
5.1.40.0080.0448.04
5.1.30.0050.0298.39
5.1.20.0060.0318.41
5.1.10.0090.0238.13
5.1.00.0060.0298.14
5.0.50.0060.0236.61
5.0.40.0060.0186.47
5.0.30.0060.0306.29
5.0.20.0020.0246.25
5.0.10.0040.0206.23
5.0.00.0030.0336.22
4.4.90.0020.0174.78
4.4.80.0030.0224.75
4.4.70.0050.0204.76
4.4.60.0020.0194.75
4.4.50.0030.0224.77
4.4.40.0040.0284.71
4.4.30.0050.0154.76
4.4.20.0070.0114.84
4.4.10.0050.0134.85
4.4.00.0030.0244.76
4.3.110.0010.0184.67
4.3.100.0020.0204.66
4.3.90.0030.0184.64
4.3.80.0020.0294.59
4.3.70.0050.0164.63
4.3.60.0040.0174.63
4.3.50.0030.0194.63
4.3.40.0030.0264.54
4.3.30.0020.0163.29
4.3.20.0030.0153.26
4.3.10.0040.0203.21
4.3.00.0130.02010.98

preferences:
40.92 ms | 400 KiB | 5 Q