3v4l.org

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

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)
8.3.70.0150.00318.43
8.3.60.0130.00316.62
8.3.50.0070.01222.04
8.3.40.0150.00018.59
8.3.30.0040.01118.95
8.3.20.0050.00320.16
8.3.10.0070.00021.95
8.3.00.0050.00319.26
8.2.190.0100.01416.58
8.2.180.0060.00918.17
8.2.170.0090.00622.96
8.2.160.0100.00320.55
8.2.150.0070.00024.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00419.64
8.2.110.0030.00719.05
8.2.100.0120.00017.75
8.2.90.0060.00318.97
8.2.80.0000.00817.97
8.2.70.0000.00917.50
8.2.60.0000.00817.90
8.2.50.0030.00618.07
8.2.40.0040.00418.22
8.2.30.0030.00617.91
8.2.20.0040.00417.54
8.2.10.0040.00417.89
8.2.00.0070.00017.52
8.1.280.0130.00725.92
8.1.270.0030.00620.56
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0090.00022.14
8.1.230.0060.00517.43
8.1.220.0050.00317.74
8.1.210.0090.00018.77
8.1.200.0030.00617.10
8.1.190.0000.00817.10
8.1.180.0040.00418.10
8.1.170.0030.00518.53
8.1.160.0070.00021.95
8.1.150.0000.00818.70
8.1.140.0050.00217.39
8.1.130.0030.00317.75
8.1.120.0000.01017.43
8.1.110.0030.00517.31
8.1.100.0060.00317.30
8.1.90.0030.00317.45
8.1.80.0030.00317.30
8.1.70.0000.00717.45
8.1.60.0000.00817.41
8.1.50.0030.00517.51
8.1.40.0030.00617.43
8.1.30.0000.00817.49
8.1.20.0050.00217.61
8.1.10.0040.00417.26
8.1.00.0050.00317.39
8.0.300.0000.00718.77
8.0.290.0070.00016.63
8.0.280.0000.00718.41
8.0.270.0000.00717.12
8.0.260.0030.00317.19
8.0.250.0070.00016.82
8.0.240.0060.00016.91
8.0.230.0030.00316.95
8.0.220.0000.00716.88
8.0.210.0070.00016.81
8.0.200.0070.00316.88
8.0.190.0000.00716.77
8.0.180.0040.00416.84
8.0.170.0000.00816.84
8.0.160.0040.00416.84
8.0.150.0070.00016.71
8.0.140.0040.00416.81
8.0.130.0030.00313.23
8.0.120.0080.00016.81
8.0.110.0070.00016.75
8.0.100.0050.00216.84
8.0.90.0070.00016.81
8.0.80.0110.01116.76
8.0.70.0000.00716.88
8.0.60.0080.00016.70
8.0.50.0040.00416.65
8.0.30.0110.01017.17
8.0.20.0100.00917.40
8.0.10.0030.00517.00
8.0.00.0100.00616.75
7.4.330.0060.00015.03
7.4.320.0060.00016.52
7.4.300.0040.00416.38
7.4.290.0040.00416.51
7.4.280.0070.00016.45
7.4.270.0040.00416.43
7.4.260.0080.00016.29
7.4.250.0020.00516.50
7.4.240.0010.00616.39
7.4.230.0030.00316.46
7.4.220.0180.00016.51
7.4.210.0070.00716.61
7.4.200.0000.00716.35
7.4.160.0120.00416.37
7.4.150.0100.01917.40
7.4.140.0080.01117.86
7.4.130.0130.01116.56
7.4.120.0090.00816.45
7.4.110.0060.01716.47
7.4.100.0100.00716.63
7.4.90.0120.00816.57
7.4.80.0090.00919.39
7.4.70.0040.01216.43
7.4.60.0130.01016.42
7.4.50.0000.00416.33
7.4.40.0090.00616.27
7.4.30.0110.01116.59
7.4.00.0100.00814.75
7.3.330.0000.00612.98
7.3.320.0120.00313.02
7.3.310.0040.00415.98
7.3.300.0030.00316.04
7.3.290.0120.00416.22
7.3.280.0050.01216.14
7.3.270.0120.00617.40
7.3.260.0130.00416.19
7.3.250.0170.00416.28
7.3.240.0030.01316.09
7.3.230.0040.01316.39
7.3.210.0030.01316.30
7.3.200.0100.00719.39
7.3.190.0090.01216.14
7.3.180.0080.00816.31
7.3.170.0030.01716.27
7.3.160.0030.01316.34
7.3.120.0100.00714.52
7.3.110.0030.00614.67
7.3.100.0000.01214.45
7.3.90.0120.00314.64
7.3.80.0090.00314.80
7.3.70.0110.00014.77
7.3.60.0030.01014.69
7.3.50.0100.00014.61
7.3.40.0060.00914.47
7.3.30.0070.00714.35
7.3.20.0080.00816.70
7.3.10.0060.00916.46
7.3.00.0030.00916.36
7.2.330.0180.00316.53
7.2.320.0070.01016.43
7.2.310.0030.01416.43
7.2.300.0000.01616.42
7.2.290.0160.00816.57
7.2.250.0000.01414.85
7.2.240.0030.01715.01
7.2.230.0070.00714.89
7.2.220.0060.00914.91
7.2.210.0040.01114.85
7.2.200.0000.01515.02
7.2.190.0040.01114.76
7.2.180.0030.01014.75
7.2.170.0100.00614.91
7.2.130.0040.00816.80
7.2.120.0060.00616.47
7.2.110.0000.01116.52
7.2.100.0060.00616.86
7.2.90.0060.00616.74
7.2.80.0030.00716.74
7.2.70.0030.01016.47
7.2.60.0030.01016.53
7.2.50.0060.01016.76
7.2.40.0030.00616.63
7.2.30.0110.00016.81
7.2.20.0040.00716.71
7.2.10.0030.00616.79
7.2.00.0030.01018.01
7.1.330.0100.00715.62
7.1.320.0070.01015.49
7.1.310.0070.00715.55
7.1.300.0000.01515.61
7.1.290.0030.00915.64
7.1.280.0040.01115.55
7.1.270.0100.00315.43
7.1.260.0030.01415.86
7.1.250.0030.00615.56
7.1.100.0080.00318.09
7.1.70.0060.00317.02
7.1.60.0170.00719.50
7.1.50.0070.01016.69
7.1.00.0070.07322.31
7.0.200.0030.00716.61
7.0.140.0000.07722.07
7.0.60.0130.07020.08
7.0.50.0070.08717.90
7.0.40.0070.09320.39
7.0.30.0230.05320.34
7.0.20.0230.04020.03
7.0.10.0200.04720.15
7.0.00.0070.06020.20
5.6.280.0000.07720.90
5.6.210.0100.05020.43
5.6.200.0030.08318.23
5.6.190.0130.08020.35
5.6.180.0430.06320.61
5.6.170.0230.07020.44
5.6.160.0030.08720.37
5.6.150.0070.08318.09
5.6.140.0000.08018.21
5.6.130.0100.07318.11
5.6.120.0030.04320.99
5.6.110.0200.06020.97
5.6.100.0030.09020.98
5.6.90.0100.08320.96
5.6.80.0300.05720.39
5.6.70.0170.08020.39
5.5.350.0170.08320.37
5.5.340.0130.07317.98
5.5.330.0100.04720.47
5.5.320.0200.07720.57
5.5.310.0170.04320.20
5.5.300.0070.03718.01
5.5.290.0100.07717.98
5.5.280.0100.06320.86
5.5.270.0030.05720.72
5.5.260.0030.07020.93
5.5.250.0070.05020.46
5.5.240.0200.07020.11
5.4.450.0770.05019.39
5.4.440.0930.06319.12
5.4.430.0130.05719.44
5.4.420.0900.05019.23
5.4.410.0530.06319.19
5.4.400.0170.05318.68
5.4.390.0170.05318.44
5.4.380.0200.06018.49
5.4.370.0170.05718.55
5.4.360.0130.05718.47
5.4.350.0300.04318.63
5.4.340.0100.06318.65
5.4.320.0130.06018.48
5.4.310.0230.04718.59
5.4.300.0200.05018.63
5.4.290.0300.04318.59
5.4.280.0200.07318.47
5.4.270.0170.05318.66
5.4.260.0270.04718.63
5.4.250.0170.05718.62
5.4.240.0270.04718.66
5.4.230.0100.06018.78
5.4.220.0130.06318.58
5.4.210.0230.05018.73
5.4.200.0200.05016.56
5.4.190.0200.05718.68
5.4.180.0170.05318.68
5.4.170.0130.06018.45
5.4.160.0100.05718.69
5.4.150.0130.06318.77
5.4.140.0130.05316.17
5.4.130.0130.05316.31
5.4.120.0170.05316.31
5.4.110.0230.04016.21
5.4.100.0230.05016.16
5.4.90.0200.05016.04
5.4.80.0170.05716.21
5.4.70.0130.05316.18
5.4.60.0130.05316.17
5.4.50.0300.04316.30
5.4.40.0270.05016.12
5.4.30.0200.05716.13
5.4.20.0130.05716.19
5.4.10.0130.05316.19
5.4.00.0130.05315.72
5.3.290.0170.05714.66
5.3.280.0170.05314.58
5.3.270.0130.06714.60
5.3.260.0270.06714.61
5.3.250.0230.06714.52
5.3.240.0170.07314.67
5.3.230.0200.05014.51
5.3.220.0300.06014.57
5.3.210.0130.05714.55
5.3.200.0230.04314.52
5.3.190.0130.05714.63
5.3.180.0170.06014.55
5.3.170.0170.05314.48
5.3.160.0270.04714.59
5.3.150.0130.05714.55
5.3.140.0170.05314.47
5.3.130.0230.05314.54
5.3.120.0370.04014.54
5.3.110.0170.06714.51
5.3.100.0330.05314.04
5.3.90.0070.06313.94
5.3.80.0170.05014.00
5.3.70.0170.05314.00
5.3.60.0230.04714.06
5.3.50.0100.05714.00
5.3.40.0130.05313.88
5.3.30.0300.04013.97
5.3.20.0270.04713.69
5.3.10.0100.06313.63
5.3.00.0200.04713.61
5.2.170.0230.04711.11
5.2.160.0130.04311.11
5.2.150.0170.04311.07
5.2.140.0130.04711.09
5.2.130.0130.04011.02
5.2.120.0130.05311.13
5.2.110.0170.03711.10
5.2.100.0170.05011.07
5.2.90.0070.05011.16
5.2.80.0070.05711.01
5.2.70.0170.04011.03
5.2.60.0070.05011.01
5.2.50.0130.04311.05
5.2.40.0130.04011.11
5.2.30.0030.05011.00
5.2.20.0100.04310.99
5.2.10.0100.04310.98
5.2.00.0130.04010.69
5.1.60.0130.0409.99
5.1.50.0100.03710.09
5.1.40.0200.02710.07
5.1.30.0100.03710.45
5.1.20.0200.04310.36
5.1.10.0130.03010.04
5.1.00.0170.03010.08
5.0.50.0100.0408.56
5.0.40.0230.0178.38
5.0.30.0100.0408.32
5.0.20.0170.0308.21
5.0.10.0170.0308.20
5.0.00.0130.0508.19
4.4.90.0070.0235.88
4.4.80.0030.0275.82
4.4.70.0100.0205.89
4.4.60.0070.0275.88
4.4.50.0030.0275.89
4.4.40.0100.0335.87
4.4.30.0030.0275.81
4.4.20.0030.0236.02
4.4.10.0130.0175.92
4.4.00.0070.0335.93
4.3.110.0130.0135.86
4.3.100.0070.0235.81
4.3.90.0100.0205.84
4.3.80.0030.0375.78
4.3.70.0030.0235.79
4.3.60.0070.0205.79
4.3.50.0100.0205.80
4.3.40.0030.0375.86
4.3.30.0070.0204.57
4.3.20.0070.0204.56
4.3.10.0070.0204.52
4.3.00.0100.0237.27

preferences:
27.53 ms | 401 KiB | 5 Q