3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = array(); $a2 = array(1 => 'data'); $result = array_merge($a1, $a2); var_dump($result); $a2 = array("1" => 'data'); $result = array_merge($a1, $a2); var_dump($result); $a2 = array("a" => 'data'); $result = array_merge($a1, $a2); var_dump($result);

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)
8.3.60.0130.00718.43
8.3.50.0130.00522.00
8.3.40.0070.00718.68
8.3.30.0140.00018.84
8.3.20.0040.00420.21
8.3.10.0000.00721.68
8.3.00.0070.00018.99
8.2.180.0100.00716.63
8.2.170.0150.00622.96
8.2.160.0100.00322.21
8.2.150.0000.00824.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0080.00019.54
8.2.110.0040.00422.23
8.2.100.0110.00017.78
8.2.90.0000.00818.79
8.2.80.0030.00617.97
8.2.70.0040.00417.50
8.2.60.0050.00317.55
8.2.50.0030.00618.07
8.2.40.0060.00319.70
8.2.30.0040.00417.96
8.2.20.0040.00417.65
8.2.10.0050.00318.10
8.2.00.0020.00517.67
8.1.280.0070.01125.92
8.1.270.0060.00318.88
8.1.260.0000.00826.35
8.1.250.0000.00728.09
8.1.240.0090.00023.78
8.1.230.0080.00418.98
8.1.220.0080.00017.74
8.1.210.0050.00318.77
8.1.200.0060.00317.35
8.1.190.0040.00417.10
8.1.180.0080.00018.10
8.1.170.0030.00618.50
8.1.160.0040.00422.00
8.1.150.0000.00718.74
8.1.140.0070.00017.29
8.1.130.0000.00717.68
8.1.120.0000.00717.28
8.1.110.0030.00417.21
8.1.100.0040.00417.27
8.1.90.0040.00417.27
8.1.80.0030.00517.42
8.1.70.0060.00317.34
8.1.60.0030.00617.49
8.1.50.0040.00417.52
8.1.40.0070.00017.33
8.1.30.0040.00417.41
8.1.20.0040.00417.52
8.1.10.0040.00417.39
8.1.00.0000.00817.28
8.0.300.0000.00718.77
8.0.290.0000.00716.63
8.0.280.0000.00718.31
8.0.270.0070.00017.28
8.0.260.0000.00617.05
8.0.250.0000.00616.79
8.0.240.0000.00616.89
8.0.230.0070.00016.88
8.0.220.0030.00516.70
8.0.210.0000.00716.86
8.0.200.0030.00316.80
8.0.190.0070.00016.79
8.0.180.0040.00416.73
8.0.170.0050.00316.66
8.0.160.0000.00716.93
8.0.150.0070.00016.77
8.0.140.0030.00316.78
8.0.130.0050.00013.20
8.0.120.0040.00416.74
8.0.110.0070.00016.71
8.0.100.0030.00516.73
8.0.90.0000.00716.79
8.0.80.0090.01216.80
8.0.70.0000.00716.65
8.0.60.0050.00316.87
8.0.50.0040.00416.72
8.0.30.0070.01416.88
8.0.20.0130.00617.40
8.0.10.0040.00416.77
8.0.00.0040.01316.75
7.4.330.0000.00715.03
7.4.320.0000.00616.51
7.4.300.0070.00016.37
7.4.290.0040.00416.51
7.4.280.0040.00416.30
7.4.270.0070.00016.41
7.4.260.0000.00616.51
7.4.250.0040.00416.43
7.4.240.0040.00416.46
7.4.230.0030.00316.54
7.4.220.0060.01216.41
7.4.210.0070.01016.55
7.4.200.0080.00016.52
7.4.160.0060.00916.37
7.4.150.0040.01417.40
7.4.140.0100.01017.86
7.4.130.0110.00916.28
7.4.120.0030.01616.36
7.4.110.0190.00316.32
7.4.100.0040.01316.36
7.4.90.0000.01816.43
7.4.80.0040.01719.39
7.4.70.0130.00716.49
7.4.60.0110.00616.38
7.4.50.0000.00816.55
7.4.40.0070.01016.45
7.4.30.0070.01316.39
7.4.00.0100.00314.40
7.3.330.0000.00712.88
7.3.320.0000.00512.83
7.3.310.0030.00416.20
7.3.300.0030.00316.13
7.3.290.0070.00816.09
7.3.280.0110.00616.15
7.3.270.0080.01117.40
7.3.260.0030.01416.19
7.3.250.0120.00516.27
7.3.240.0110.00516.13
7.3.230.0060.01216.46
7.3.210.0090.00616.39
7.3.200.0030.01219.39
7.3.190.0150.00616.35
7.3.180.0120.00416.21
7.3.170.0110.00616.27
7.3.160.0130.00316.07
7.2.330.0150.00616.33
7.2.320.0070.01016.59
7.2.310.0040.01216.66
7.2.300.0100.00616.30
7.2.290.0120.01216.59
7.2.80.0120.00016.14
7.2.60.0080.00416.58
7.2.50.0040.01116.65
7.1.200.0120.00315.40
7.1.70.0000.01217.00
7.1.60.0100.01419.46
7.1.50.0070.01716.86
7.1.00.0030.07322.30
7.0.200.0000.00716.79
7.0.140.0030.05022.07
7.0.60.0000.05319.93
7.0.50.0070.08317.80
7.0.40.0170.07320.23
7.0.30.0230.04320.17
7.0.20.0270.08020.17
7.0.10.0070.04020.17
7.0.00.0030.05720.29
5.6.210.0170.06320.45
5.6.200.0270.06318.22
5.6.190.0070.05020.63
5.6.180.0430.06720.29
5.6.170.0270.08020.45
5.6.160.0100.08020.48
5.6.150.0030.08018.12
5.6.140.0030.08318.21
5.6.130.0070.03718.20
5.6.120.0100.04320.96
5.6.110.0100.08321.13
5.6.100.0000.09720.97
5.6.90.0000.05720.98
5.6.80.0070.06020.36
5.5.350.0130.04720.39
5.5.340.0130.07317.98
5.5.330.0030.05720.41
5.5.320.0270.08020.13
5.5.310.0300.07020.41
5.5.300.0170.07317.91
5.5.290.0070.03717.95
5.5.280.0130.07720.97
5.5.270.0100.07320.74
5.5.260.0130.08020.84
5.5.250.0130.06320.57
5.5.240.0070.06720.18
5.4.450.0500.06319.59
5.4.440.0130.06019.41
5.4.430.0130.05019.14
5.4.420.0130.05019.39
5.4.410.0070.05719.15
5.4.400.0200.05318.96
5.4.390.0300.06718.61
5.4.380.0200.06018.46
5.4.370.0230.05318.61
5.4.360.0230.05318.66
5.4.350.0230.05318.77
5.4.340.0200.06018.61
5.4.320.0300.05718.71
5.4.310.0400.05318.70
5.4.300.0170.06718.59
5.4.290.0470.05318.56
5.4.280.0370.06318.71
5.4.270.0300.07718.48
5.4.260.0470.06018.48
5.4.250.0370.07718.45
5.4.240.0370.07018.39
5.4.230.0400.06318.46
5.4.220.0330.07318.55
5.4.210.0400.06318.72
5.4.200.0330.04716.45
5.4.190.0470.05018.45
5.4.180.0300.07018.68
5.4.170.0330.05718.66
5.4.160.0270.06718.66
5.4.150.0330.06318.64
5.4.140.0300.06016.28
5.4.130.0330.06716.08
5.4.120.0200.06316.25
5.4.110.0300.06716.21
5.4.100.0230.07316.12
5.4.90.0200.06716.16
5.4.80.0470.03316.24
5.4.70.0400.05716.21
5.4.60.0230.07016.14
5.4.50.0330.06316.19
5.4.40.0300.06716.19
5.4.30.0230.05716.22
5.4.20.0400.06016.19
5.4.10.0270.06016.28
5.4.00.0130.05715.80
5.3.290.0330.06014.75
5.3.280.0330.06014.66
5.3.270.0170.06314.55
5.3.260.0130.06314.52
5.3.250.0230.05314.57
5.3.240.0300.04314.55
5.3.230.0270.05714.64
5.3.220.0270.05714.55
5.3.210.0200.05714.66
5.3.200.0370.05014.54
5.3.190.0230.06314.59
5.3.180.0370.05714.45
5.3.170.0230.07014.45
5.3.160.0230.06314.59
5.3.150.0400.06314.63
5.3.140.0370.06314.65
5.3.130.0330.07014.53
5.3.120.0330.04714.64
5.3.110.0300.04714.53
5.3.100.0300.05014.04
5.3.90.0300.06014.11
5.3.80.0370.04313.99
5.3.70.0270.07714.00
5.3.60.0230.05713.99
5.3.50.0230.06313.89
5.3.40.0230.05313.87
5.3.30.0330.04713.90
5.3.20.0270.06713.78
5.3.10.0300.06713.74
5.3.00.0270.07313.57
5.2.170.0230.04711.18
5.2.160.0200.04311.07
5.2.150.0130.04711.17
5.2.140.0130.05711.11
5.2.130.0170.04711.05
5.2.120.0200.04311.06
5.2.110.0170.04711.03
5.2.100.0230.03311.02
5.2.90.0200.05011.25
5.2.80.0270.05711.01
5.2.70.0170.05011.09
5.2.60.0170.05311.05
5.2.50.0200.04711.06
5.2.40.0130.05011.13
5.2.30.0200.04311.03
5.2.20.0130.04311.11
5.2.10.0170.04311.01
5.2.00.0170.04010.74
5.1.60.0130.0409.96
5.1.50.0170.03310.01
5.1.40.0200.0339.93
5.1.30.0230.03710.43
5.1.20.0100.04010.46
5.1.10.0170.05310.08
5.1.00.0270.02710.05
5.0.50.0100.0308.56
5.0.40.0130.0278.47
5.0.30.0130.0408.29
5.0.20.0200.0278.26
5.0.10.0170.0278.37
5.0.00.0070.0478.14
4.4.90.0070.0335.93
4.4.80.0100.0235.81
4.4.70.0130.0235.94
4.4.60.0100.0205.87
4.4.50.0130.0175.94
4.4.40.0270.0405.91
4.4.30.0070.0335.91
4.4.20.0170.0275.94
4.4.10.0130.0275.92
4.4.00.0170.0335.90
4.3.110.0070.0235.75
4.3.100.0070.0235.80
4.3.90.0100.0305.88
4.3.80.0100.0435.79
4.3.70.0130.0235.86
4.3.60.0100.0305.82
4.3.50.0130.0275.77
4.3.40.0130.0375.79
4.3.30.0030.0274.66
4.3.20.0030.0274.57
4.3.10.0100.0274.50
4.3.00.0170.0177.19

preferences:
56.38 ms | 401 KiB | 5 Q