3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = [1 => 'foo', 2 => 'baz']; $a2 = [3 => 'baz']; $a3 = []; var_dump(array_merge($a1, $a2)); var_dump(array_merge($a1, $a3));

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)
8.3.70.0140.00716.50
8.3.60.0040.01116.37
8.3.50.0070.00821.93
8.3.40.0060.00918.62
8.3.30.0140.00019.00
8.3.20.0040.00420.33
8.3.10.0070.00023.66
8.3.00.0090.00019.26
8.2.180.0090.01218.29
8.2.170.0210.00022.96
8.2.160.0100.01020.40
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0050.00322.14
8.2.110.0100.00020.43
8.2.100.0040.00817.78
8.2.90.0050.00319.14
8.2.80.0030.00517.97
8.2.70.0040.00817.38
8.2.60.0030.00617.91
8.2.50.0030.00618.07
8.2.40.0040.00419.95
8.2.30.0040.00419.66
8.2.20.0040.00417.52
8.2.10.0040.00417.91
8.2.00.0050.00217.54
8.1.280.0170.00025.92
8.1.270.0060.00323.83
8.1.260.0000.00826.35
8.1.250.0040.00428.09
8.1.240.0030.00622.28
8.1.230.0070.00419.14
8.1.220.0050.00317.74
8.1.210.0030.00518.77
8.1.200.0060.00317.35
8.1.190.0040.00417.10
8.1.180.0040.00418.10
8.1.170.0000.00818.56
8.1.160.0000.00721.88
8.1.150.0040.00418.57
8.1.140.0000.00717.45
8.1.130.0070.00017.83
8.1.120.0000.00717.27
8.1.110.0040.00417.23
8.1.100.0040.00417.34
8.1.90.0040.00417.42
8.1.80.0070.00017.33
8.1.70.0030.00317.31
8.1.60.0030.00617.48
8.1.50.0060.00317.49
8.1.40.0000.00717.45
8.1.30.0040.00417.61
8.1.20.0070.00017.51
8.1.10.0000.00717.32
8.1.00.0020.00517.27
8.0.300.0040.00418.85
8.0.290.0040.00417.15
8.0.280.0000.00718.37
8.0.270.0030.00317.10
8.0.260.0000.00617.19
8.0.250.0000.00716.89
8.0.240.0000.00716.88
8.0.230.0030.00316.84
8.0.220.0000.00716.85
8.0.210.0000.00716.80
8.0.200.0000.00616.88
8.0.190.0040.00416.89
8.0.180.0030.00516.88
8.0.170.0040.00416.75
8.0.160.0030.00316.77
8.0.150.0000.00716.76
8.0.140.0050.00216.74
8.0.130.0000.00713.24
8.0.120.0030.00616.83
8.0.110.0000.00716.85
8.0.100.0000.00716.61
8.0.90.0080.00016.79
8.0.80.0080.00816.81
8.0.70.0000.00716.72
8.0.60.0000.00716.81
8.0.50.0000.00716.70
8.0.30.0080.01117.13
8.0.20.0100.01017.40
8.0.10.0070.00017.00
8.0.00.0090.01116.62
7.4.330.0050.00015.03
7.4.320.0060.00016.36
7.4.300.0000.00716.47
7.4.290.0040.00416.44
7.4.280.0070.00016.52
7.4.270.0000.00716.42
7.4.260.0030.00316.52
7.4.250.0040.00416.35
7.4.240.0060.00116.57
7.4.230.0000.00716.51
7.4.220.0090.00916.60
7.4.210.0050.00916.48
7.4.200.0000.00816.55
7.4.190.0040.00416.49
7.4.160.0070.01016.19
7.4.150.0090.00917.40
7.4.140.0060.01217.86
7.4.130.0130.00316.37
7.4.120.0110.00716.58
7.4.110.0060.01216.25
7.4.100.0030.01516.50
7.4.90.0060.01216.28
7.4.80.0060.01219.39
7.4.70.0090.00616.39
7.4.60.0090.00616.09
7.4.50.0050.00016.38
7.4.40.0090.00916.37
7.4.30.0080.00816.46
7.4.00.0090.00614.94
7.3.330.0000.00512.90
7.3.320.0000.00612.98
7.3.310.0070.00015.96
7.3.300.0070.00016.09
7.3.290.0080.00816.20
7.3.280.0040.01416.14
7.3.270.0140.00317.40
7.3.260.0090.00916.41
7.3.250.0150.00416.27
7.3.240.0110.00716.18
7.3.230.0070.01016.39
7.3.210.0070.01116.44
7.3.200.0090.01219.39
7.3.190.0160.00316.22
7.3.180.0000.01616.32
7.3.170.0060.00916.45
7.3.160.0100.00616.16
7.3.120.0060.00914.58
7.2.330.0120.00616.30
7.2.320.0170.00416.47
7.2.310.0090.00916.51
7.2.300.0030.01316.25
7.2.290.0070.01016.32
7.2.60.0070.00716.60
7.2.00.0030.01019.19
7.1.200.0000.01215.65
7.1.100.0250.00617.89
7.1.70.0030.00616.81
7.1.60.0040.00717.27
7.1.50.0240.00716.76
7.1.00.0030.07722.36
7.0.200.0000.01716.35
7.0.140.0030.06722.18
7.0.60.0070.08320.01
7.0.50.0170.07317.84
7.0.40.0030.08720.09
7.0.30.0130.05320.04
7.0.20.0330.05020.13
7.0.10.0070.05320.30
7.0.00.0130.07720.00
5.6.280.0000.07321.11
5.6.210.0030.04020.72
5.6.200.0070.08018.13
5.6.190.0000.06720.57
5.6.180.0270.08320.63
5.6.170.0330.07020.50
5.6.160.0070.04320.39
5.6.150.0070.03318.22
5.6.140.0070.08018.07
5.6.130.0030.08718.18
5.6.120.0100.08321.13
5.6.110.0170.07021.00
5.6.100.0070.04021.12
5.6.90.0070.04321.13
5.6.80.0130.07720.50
5.5.350.0300.07720.34
5.5.340.0000.07717.89
5.5.330.0130.05020.37
5.5.320.0170.04320.18
5.5.310.0300.07020.29
5.5.300.0070.03717.87
5.5.290.0100.07717.98
5.5.280.0100.08320.85
5.5.270.0070.04720.71
5.5.260.0130.06720.86
5.5.250.0130.08020.68
5.5.240.0230.06720.25
5.4.450.2370.03719.46
5.4.440.2670.05019.23
5.4.430.2430.03719.25
5.4.420.2830.03719.48
5.4.410.2530.03719.33
5.4.400.3000.03719.22
5.4.390.2700.03719.21
5.4.380.2730.04018.88
5.4.370.2430.04019.25
5.4.360.2500.03019.24
5.4.350.2400.04319.24
5.4.340.2500.03319.06
5.4.320.2470.04019.25
5.4.310.2400.04319.08
5.4.300.2600.04719.06
5.4.290.2470.03719.07
5.4.280.2630.03718.88
5.4.270.2870.04019.06
5.4.260.2900.04319.24
5.4.250.2500.03719.21
5.4.240.2400.04019.05
5.4.230.2570.03719.09
5.4.220.2800.03719.05
5.4.210.3130.04318.93
5.4.200.2430.03718.77
5.4.190.2670.03719.17
5.4.180.2600.04019.12
5.4.170.2730.03719.23
5.4.160.2630.04019.21
5.4.150.2400.03718.91
5.4.140.2370.03716.55
5.4.130.2400.03316.18
5.4.120.2700.02716.55
5.4.110.2600.03716.39
5.4.100.2700.04016.41
5.4.90.2400.04016.43
5.4.80.2670.03316.32
5.4.70.2470.03016.26
5.4.60.2670.04316.20
5.4.50.2630.03716.04
5.4.40.2470.03316.21
5.4.30.2400.03316.45
5.4.20.2430.03016.36
5.4.10.2630.04316.18
5.4.00.2570.03315.72
5.3.290.2600.04014.50
5.3.280.2570.04314.69
5.3.270.2470.05014.56
5.3.260.2670.03314.48
5.3.250.2500.04014.44
5.3.240.2500.04314.45
5.3.230.2630.04714.55
5.3.220.2770.03014.45
5.3.210.2800.04314.40
5.3.200.2300.04714.55
5.3.190.2830.03714.52
5.3.180.2800.03014.44
5.3.170.2370.05014.41
5.3.160.2470.04314.52
5.3.150.2230.03714.39
5.3.140.2130.04314.65
5.3.130.2730.03314.39
5.3.120.2470.04014.46
5.3.110.2570.02714.57
5.3.100.2530.03714.14
5.3.90.2500.03713.89
5.3.80.2770.03713.79
5.3.70.2930.04013.81
5.3.60.2500.03313.84
5.3.50.2500.03314.04
5.3.40.2270.04013.79
5.3.30.2470.03313.76
5.3.20.2630.02713.56
5.3.10.2800.04013.43
5.3.00.2830.02313.48
5.2.170.2370.03011.00
5.2.160.2030.02311.16
5.2.150.2170.03311.00
5.2.140.2230.03011.17
5.2.130.2000.02711.15
5.2.120.2300.02710.90
5.2.110.2130.03311.04
5.2.100.2330.02711.04
5.2.90.2270.03010.95
5.2.80.2000.03711.03
5.2.70.1930.03310.93
5.2.60.2230.03311.06
5.2.50.2230.03311.04
5.2.40.1670.03010.88
5.2.30.1600.03010.83
5.2.20.1800.03011.00
5.2.10.1600.02710.93
5.2.00.1600.02710.63
5.1.60.1870.02710.11
5.1.50.1930.0279.89
5.1.40.1400.0279.98
5.1.30.1770.02310.50
5.1.20.1330.02710.23
5.1.10.0030.0239.95
5.1.00.0000.0279.96
5.0.50.0000.0208.63
5.0.40.0030.0208.35
5.0.30.0000.0338.19
5.0.20.0030.0208.09
5.0.10.0200.0238.08
5.0.00.0470.0308.03
4.4.90.0500.0207.28
4.4.80.0730.0107.28
4.4.70.0570.0177.28
4.4.60.0670.0177.28
4.4.50.0800.0177.28
4.4.40.0700.0277.28
4.4.30.0800.0137.28
4.4.20.0830.0177.28
4.4.10.0800.0137.28
4.4.00.0770.0277.28
4.3.110.1000.0107.28
4.3.100.1000.0207.28
4.3.90.1000.0207.28
4.3.80.0870.0307.28
4.3.70.0830.0107.28
4.3.60.0730.0177.28
4.3.50.0700.0207.28
4.3.40.0570.0237.28
4.3.30.0430.0137.28
4.3.20.0470.0207.28
4.3.10.0300.0237.28
4.3.00.0400.0137.28

preferences:
48.49 ms | 401 KiB | 5 Q