3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ['a'=> 'b', 'c'=> 'd']; $b = ['a'=> 'x', 'c'=> 'y', 'b'=> 'z']; var_dump($a + $b); var_dump(array_merge($a, $b));

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)
8.3.60.0000.01418.56
8.3.50.0090.01121.04
8.3.40.0070.00718.77
8.3.30.0080.00618.87
8.3.20.0040.00420.27
8.3.10.0080.00020.53
8.3.00.0030.00519.35
8.2.180.0030.01318.18
8.2.170.0070.00722.96
8.2.160.0170.00320.52
8.2.150.0020.00524.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0080.00022.09
8.2.110.0090.00022.29
8.2.100.0040.00717.91
8.2.90.0000.00818.87
8.2.80.0030.00517.97
8.2.70.0000.01217.50
8.2.60.0030.00517.80
8.2.50.0050.00318.07
8.2.40.0090.00019.76
8.2.30.0070.00317.93
8.2.20.0040.00417.55
8.2.10.0080.00017.92
8.2.00.0050.00317.54
8.1.280.0070.00725.92
8.1.270.0080.00023.82
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0090.00023.93
8.1.230.0040.00719.09
8.1.220.0050.00317.74
8.1.210.0000.00818.77
8.1.200.0090.00317.23
8.1.190.0000.00917.23
8.1.180.0040.00418.10
8.1.170.0040.00418.45
8.1.160.0040.00421.84
8.1.150.0000.00718.74
8.1.140.0000.00717.25
8.1.130.0060.00017.72
8.1.120.0040.00417.32
8.1.110.0020.00517.46
8.1.100.0040.00417.34
8.1.90.0000.00817.38
8.1.80.0000.00717.43
8.1.70.0030.00317.34
8.1.60.0050.00317.50
8.1.50.0000.00817.47
8.1.40.0070.00017.32
8.1.30.0050.00317.46
8.1.20.0000.00817.44
8.1.10.0040.00417.47
8.1.00.0100.00017.25
8.0.300.0040.00419.15
8.0.290.0040.00416.63
8.0.280.0030.00318.28
8.0.270.0000.00717.19
8.0.260.0030.00517.17
8.0.250.0070.00016.85
8.0.240.0030.00316.93
8.0.230.0030.00316.91
8.0.220.0000.00716.86
8.0.210.0030.00316.77
8.0.200.0000.00616.98
8.0.190.0070.00416.87
8.0.180.0040.00416.88
8.0.170.0050.00316.88
8.0.160.0000.00716.82
8.0.150.0080.00016.86
8.0.140.0000.00816.78
8.0.130.0000.00613.23
8.0.120.0000.00816.85
8.0.110.0000.00816.81
8.0.100.0000.00716.86
8.0.90.0000.00816.94
8.0.80.0060.01516.83
8.0.70.0000.00716.89
8.0.60.0000.00716.94
8.0.50.0000.00716.89
8.0.30.0120.00917.08
8.0.20.0130.00817.40
8.0.10.0070.00016.98
8.0.00.0100.00716.65
7.4.330.0050.00015.04
7.4.320.0000.00716.50
7.4.300.0000.00616.53
7.4.290.0000.00716.43
7.4.280.0060.00316.46
7.4.270.0000.00716.50
7.4.260.0040.00416.41
7.4.250.0040.00416.29
7.4.240.0030.00316.44
7.4.230.0030.00316.30
7.4.220.0090.00916.54
7.4.210.0070.00716.30
7.4.200.0000.00716.61
7.4.160.0080.00816.48
7.4.150.0100.00917.40
7.4.140.0080.01017.86
7.4.130.0070.00916.46
7.4.120.0030.01316.32
7.4.110.0070.01016.32
7.4.100.0100.01316.36
7.4.90.0130.00316.32
7.4.80.0130.01019.39
7.4.70.0060.01116.30
7.4.60.0040.01216.51
7.4.50.0060.00316.34
7.4.40.0080.00816.56
7.4.30.0130.00316.38
7.4.00.0060.01014.90
7.3.330.0060.00013.13
7.3.320.0030.00312.95
7.3.310.0030.00316.03
7.3.300.0000.00716.19
7.3.290.0140.00016.22
7.3.280.0090.00816.22
7.3.270.0150.00317.40
7.3.260.0070.01116.15
7.3.250.0110.01016.19
7.3.240.0050.01216.25
7.3.230.0100.01016.47
7.3.210.0130.00616.37
7.3.200.0090.00919.39
7.3.190.0120.00316.16
7.3.180.0090.00616.13
7.3.170.0090.00816.40
7.3.160.0030.01216.27
7.3.10.0030.00816.72
7.3.00.0030.00916.41
7.2.330.0170.00416.26
7.2.320.0100.01416.66
7.2.310.0260.01916.58
7.2.300.0170.00016.57
7.2.290.0120.01016.59
7.2.130.0060.00616.71
7.2.120.0030.00716.51
7.2.110.0030.00616.20
7.2.100.0000.01216.66
7.2.90.0030.00916.33
7.2.80.0030.00916.66
7.2.70.0060.00916.70
7.2.60.0040.00716.56
7.2.50.0040.00816.63
7.2.40.0060.00616.41
7.2.30.0040.00716.61
7.2.20.0040.00816.74
7.2.10.0070.00716.41
7.2.00.0090.01117.89
7.1.250.0040.00715.66
7.1.100.0000.00918.24
7.1.70.0030.00517.04
7.1.60.0090.00919.32
7.1.50.0110.01116.86
7.1.00.0070.07322.27
7.0.200.0030.00616.87
7.0.140.0070.06321.92
7.0.60.0100.08019.96
7.0.50.0070.05717.81
7.0.40.0070.08320.24
7.0.30.0330.07020.20
7.0.20.0170.09320.00
7.0.10.0000.09320.13
7.0.00.0130.03720.01
5.6.280.0030.07321.09
5.6.210.0170.07320.71
5.6.200.0130.04718.16
5.6.190.0030.06320.63
5.6.180.0130.04020.61
5.6.170.0200.04720.44
5.6.160.0030.05020.48
5.6.150.0100.03318.07
5.6.140.0130.07318.11
5.6.130.0030.04018.17
5.6.120.0070.09021.01
5.6.110.0170.08021.11
5.6.100.0130.08021.13
5.6.90.0030.08720.98
5.6.80.0130.08020.38
5.5.350.0330.07320.41
5.5.340.0100.05718.02
5.5.330.0200.06720.16
5.5.320.0270.04020.32
5.5.310.0300.05720.22
5.5.300.0130.07317.99
5.5.290.0000.06017.87
5.5.280.0030.04720.80
5.5.270.0100.05020.86
5.5.260.0030.04720.95
5.5.250.0070.07020.60
5.5.240.0000.08020.28
5.4.450.1300.04319.21
5.4.440.1070.05019.49
5.4.430.0500.04319.54
5.4.420.0800.00019.25
5.4.410.0630.00019.35
5.4.400.0630.00019.19
5.4.390.0630.00018.95
5.4.380.0670.00019.00
5.4.370.0600.00019.00
5.4.360.0630.00019.08
5.4.350.0670.00019.10
5.4.340.0700.00019.05
5.4.320.0040.03912.45
5.4.310.0080.03612.45
5.4.300.0090.04512.45
5.4.290.0070.03812.45
5.4.280.0050.03712.35
5.4.270.0020.04012.34
5.4.260.0070.03812.34
5.4.250.0060.03912.34
5.4.240.0040.03812.35
5.4.230.0060.03812.34
5.4.220.0100.03312.34
5.4.210.0040.03912.34
5.4.200.0080.03512.34
5.4.190.0070.03512.34
5.4.180.0040.03812.33
5.4.170.0070.03612.34
5.4.160.0070.03512.34
5.4.150.0070.03712.34
5.4.140.0040.03912.02
5.4.130.0040.03812.01
5.4.120.0060.03511.97
5.4.110.0060.03611.96
5.4.100.0100.03111.96
5.4.90.0060.03911.96
5.4.80.0020.04111.96
5.4.70.0060.03611.96
5.4.60.0060.03911.96
5.4.50.0070.03911.96
5.4.40.0090.03811.95
5.4.30.0060.03711.95
5.4.20.0050.04011.95
5.4.10.0090.03811.95
5.4.00.0050.04111.43
5.3.290.0080.04212.80
5.3.280.0050.04012.71
5.3.270.0110.04012.72
5.3.260.0050.04312.72
5.3.250.0060.04112.72
5.3.240.0050.03912.72
5.3.230.0070.03812.71
5.3.220.0160.07512.68
5.3.210.0110.04012.68
5.3.200.0040.04212.68
5.3.190.0120.03412.67
5.3.180.0080.03612.67
5.3.170.0040.04012.67
5.3.160.0040.03912.67
5.3.150.0050.03912.67
5.3.140.0060.03712.66
5.3.130.0070.03912.66
5.3.120.0090.03912.66
5.3.110.0050.04212.66
5.3.100.0030.04012.12
5.3.90.0100.03412.09
5.3.80.0080.03512.07
5.3.70.0080.03912.08
5.3.60.0060.04112.06
5.3.50.0070.03512.00
5.3.40.0040.03812.00
5.3.30.0060.03411.95
5.3.20.0050.03611.72
5.3.10.0050.03611.70
5.3.00.0050.03911.68
5.2.170.0060.0319.18
5.2.160.0060.0359.18
5.2.150.0070.0339.18
5.2.140.0060.0299.18
5.2.130.0050.0309.14
5.2.120.0060.0319.14
5.2.110.0070.0279.14
5.2.100.0070.0269.14
5.2.90.0070.0289.14
5.2.80.0060.0299.14
5.2.70.0060.0299.14
5.2.60.0040.0319.09
5.2.50.0050.0309.06
5.2.40.0040.0299.03
5.2.30.0050.0309.01
5.2.20.0050.0289.00
5.2.10.0040.0288.92
5.2.00.0040.0298.78
5.1.60.0050.0228.07
5.1.50.0040.0288.06
5.1.40.0060.0238.05
5.1.30.0030.0278.40
5.1.20.0050.0268.42
5.1.10.0040.0268.14
5.1.00.0060.0238.14
5.0.50.0040.0226.62
5.0.40.0050.0186.47
5.0.30.0060.0306.29
5.0.20.0040.0196.26
5.0.10.0020.0236.24
5.0.00.0030.0336.23
4.4.90.0030.0164.78
4.4.80.0030.0194.76
4.4.70.0030.0154.75
4.4.60.0010.0184.75
4.4.50.0040.0154.77
4.4.40.0030.0254.71
4.4.30.0010.0174.76
4.4.20.0030.0154.85
4.4.10.0020.0244.85
4.4.00.0040.0264.76
4.3.110.0050.0164.67
4.3.100.0020.0164.66
4.3.90.0040.0144.63
4.3.80.0000.0274.59
4.3.70.0010.0164.63
4.3.60.0040.0204.63
4.3.50.0040.0204.63
4.3.40.0050.0224.54
4.3.30.0040.0153.29
4.3.20.0040.0143.26
4.3.10.0040.0183.22
4.3.00.0030.01013.59

preferences:
39.04 ms | 400 KiB | 5 Q