3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('foo' => "xyz", null => "abc"); $b = array('bar' => "baz", null => "xyz"); var_dump(array_merge_recursive($a,$b)); var_dump(merge($a,$b)); function merge(array $a, array $b) { foreach ($b as $key => $value) { if (isset($a[$key])) { if (is_int($key)) { $a[] = $value; } elseif (is_array($value) && is_array($a[$key])) { $a[$key] = merge($a[$key], $value); } else { $a[$key] = $value; } } else { $a[$key] = $value; } } return $a; }

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)
8.3.40.0040.01118.67
8.3.30.0080.00620.34
8.3.20.0000.00720.24
8.3.10.0080.00022.13
8.3.00.0040.00422.34
8.2.170.0110.00422.96
8.2.160.0130.00322.12
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0090.00026.16
8.2.120.0000.00820.77
8.2.110.0110.00020.47
8.2.100.0040.00717.72
8.2.90.0030.00619.21
8.2.80.0000.00719.35
8.2.70.0040.00417.75
8.2.60.0000.00818.04
8.2.50.0030.00518.07
8.2.40.0060.00318.34
8.2.30.0060.00319.50
8.2.20.0050.00217.72
8.2.10.0040.00417.68
8.2.00.0000.00717.80
8.1.270.0050.00323.99
8.1.260.0060.00326.35
8.1.250.0070.00028.09
8.1.240.0030.00623.88
8.1.230.0080.00418.99
8.1.220.0040.00417.79
8.1.210.0050.00318.77
8.1.200.0090.00017.48
8.1.190.0000.00817.41
8.1.180.0040.00418.10
8.1.170.0030.00618.50
8.1.160.0040.00418.79
8.1.150.0020.00518.59
8.1.140.0040.00417.56
8.1.130.0070.00017.75
8.1.120.0000.00717.45
8.1.110.0040.00417.48
8.1.100.0040.00417.35
8.1.90.0000.00817.39
8.1.80.0000.00817.35
8.1.70.0000.00717.37
8.1.60.0040.00417.59
8.1.50.0000.00817.54
8.1.40.0080.00017.57
8.1.30.0040.00417.52
8.1.20.0000.00817.55
8.1.10.0020.00517.44
8.1.00.0040.00417.37
8.0.300.0040.00418.77
8.0.290.0030.00517.05
8.0.280.0030.00318.37
8.0.270.0000.00717.18
8.0.260.0070.00016.71
8.0.250.0040.00416.98
8.0.240.0080.00416.93
8.0.230.0030.00316.94
8.0.220.0070.00016.95
8.0.210.0000.00716.92
8.0.200.0060.00016.99
8.0.190.0050.00316.96
8.0.180.0020.00516.97
8.0.170.0030.00616.84
8.0.160.0030.00316.87
8.0.150.0050.00316.90
8.0.140.0040.00416.90
8.0.130.0030.00313.34
8.0.120.0080.00016.75
8.0.110.0040.00416.88
8.0.100.0050.00316.92
8.0.90.0040.00416.84
8.0.80.0110.00416.87
8.0.70.0040.00416.68
8.0.60.0000.00716.87
8.0.50.0000.00816.99
8.0.30.0060.01216.87
8.0.20.0120.00817.40
8.0.10.0040.00417.03
8.0.00.0120.00516.80
7.4.330.0000.00615.00
7.4.320.0000.00616.43
7.4.300.0030.00316.44
7.4.290.0020.00516.48
7.4.280.0060.00316.44
7.4.270.0040.00416.45
7.4.260.0030.00313.17
7.4.250.0000.00716.57
7.4.240.0040.00416.61
7.4.230.0000.00716.51
7.4.220.0100.01316.52
7.4.210.0110.00616.61
7.4.200.0030.00516.44
7.4.190.0000.00716.56
7.4.160.0030.01316.39
7.4.150.0090.00917.40
7.4.140.0170.00717.86
7.4.130.0160.01716.52
7.4.120.0090.00916.53
7.4.110.0160.00616.64
7.4.100.0120.00616.48
7.4.90.0090.00916.48
7.4.80.0100.01019.39
7.4.70.0080.00816.42
7.4.60.0100.01316.52
7.4.50.0030.00616.41
7.4.40.0040.01222.77
7.4.30.0110.00616.31
7.4.00.0090.00714.96
7.3.330.0050.00013.38
7.3.320.0000.00513.32
7.3.310.0000.00816.41
7.3.300.0030.00316.38
7.3.290.0000.01316.41
7.3.280.0070.00916.37
7.3.270.0100.00717.40
7.3.260.0130.00316.36
7.3.250.0080.01216.37
7.3.240.0080.00816.44
7.3.230.0120.00616.51
7.3.210.0130.00716.57
7.3.200.0080.01519.39
7.3.190.0130.01016.56
7.3.180.0100.00716.38
7.3.170.0030.01316.38
7.3.160.0080.00816.58
7.3.120.0090.00914.81
7.3.110.0040.01414.78
7.3.100.0070.00415.00
7.3.90.0130.00014.64
7.3.80.0030.00615.01
7.3.70.0000.01014.73
7.3.60.0120.00314.89
7.3.50.0090.00014.88
7.3.40.0110.00414.54
7.3.30.0070.00314.90
7.3.20.0080.00416.76
7.3.10.0070.00616.73
7.3.00.0060.00316.74
7.2.330.0150.00316.62
7.2.320.0170.00516.34
7.2.310.0140.00316.84
7.2.300.0140.01016.84
7.2.290.0030.01516.66
7.2.250.0040.01514.55
7.2.240.0150.00415.19
7.2.230.0000.00914.80
7.2.220.0070.00715.14
7.2.210.0050.00514.88
7.2.200.0030.01015.10
7.2.190.0070.01114.99
7.2.180.0040.00714.95
7.2.170.0040.00714.85
7.2.60.0070.00716.97
7.2.00.0030.00919.03
7.1.330.0110.00416.00
7.1.320.0060.00615.65
7.1.310.0000.01715.81
7.1.300.0040.00815.64
7.1.290.0070.00415.97
7.1.280.0000.00915.52
7.1.270.0070.00315.61
7.1.260.0030.00615.77
7.1.200.0080.00415.88
7.1.100.0070.00718.05
7.1.70.0030.00617.35
7.1.60.0110.01419.32
7.1.50.0040.00816.82
7.1.00.0030.07022.45
7.0.200.0140.00716.46
7.0.140.0100.06722.21
7.0.60.0200.07719.86
7.0.50.0030.04017.77
7.0.40.0000.04720.21
7.0.30.0230.05020.22
7.0.20.0300.08020.13
7.0.10.0330.07320.09
7.0.00.0100.05020.08
5.6.280.0100.07021.12
5.6.210.0100.07320.46
5.6.200.0000.04318.25
5.6.190.0030.09020.47
5.6.180.0270.07720.33
5.6.170.0100.09720.44
5.6.160.0030.08320.50
5.6.150.0030.08018.23
5.6.140.0070.08318.25
5.6.130.0030.08318.18
5.6.120.0030.05321.00
5.6.110.0000.04320.91
5.6.100.0100.05721.11
5.6.90.0030.06021.11
5.6.80.0030.08320.38
5.5.350.0100.08720.47
5.5.340.0100.05018.05
5.5.330.0070.08720.41
5.5.320.0300.08320.40
5.5.310.0170.05320.34
5.5.300.0030.04018.01
5.5.290.0030.06717.93
5.5.280.0030.04320.98
5.5.270.0030.04020.77
5.5.260.0100.03320.76
5.5.250.0100.06020.46
5.5.240.0170.06020.18
5.4.450.0300.05719.39
5.4.440.0170.05019.32
5.4.430.0270.05319.30
5.4.420.0270.05019.32
5.4.410.0370.06319.34
5.4.400.0370.05719.09
5.4.390.0200.04319.07
5.4.380.0200.05019.15
5.4.370.0300.03319.06
5.4.360.0230.04319.20
5.4.350.0270.07318.98
5.4.340.0330.07019.20
5.4.320.0200.05019.23
5.4.310.0170.04719.31
5.4.300.0100.05019.19
5.4.290.0200.06719.20
5.4.280.0470.06718.86
5.4.270.0270.06719.09
5.4.260.0200.04319.08
5.4.250.0200.04719.25
5.4.240.0230.04718.84
5.4.230.0300.05719.08
5.4.220.0130.04719.15
5.4.210.0200.03719.08
5.4.200.0230.04019.16
5.4.190.0230.04019.08
5.4.180.0200.04019.18
5.4.170.0300.03718.97
5.4.160.0230.06719.10
5.4.150.0270.03018.85
5.4.140.0270.06716.34
5.4.130.0270.04316.41
5.4.120.0300.03316.30
5.4.110.0200.03316.28
5.4.100.0130.04016.56
5.4.90.0170.03716.19
5.4.80.0270.04716.43
5.4.70.0230.03316.44
5.4.60.0230.07316.38
5.4.50.0200.03716.42
5.4.40.0200.03716.43
5.4.30.0270.05016.16
5.4.20.0270.03716.52
5.4.10.0330.06716.51
5.4.00.0200.05015.76
5.3.290.0170.05314.67
5.3.280.0170.04314.71
5.3.270.0270.06014.77
5.3.260.0230.05014.59
5.3.250.0230.03314.51
5.3.240.0170.04314.51
5.3.230.0270.04714.74
5.3.220.0230.05014.62
5.3.210.0300.04714.48
5.3.200.0170.03314.57
5.3.190.0200.03714.79
5.3.180.0270.05014.58
5.3.170.0200.07714.61
5.3.160.0230.03714.53
5.3.150.0130.04014.57
5.3.140.0100.05014.48
5.3.130.0270.06714.55
5.3.120.0170.03714.61
5.3.110.0300.05014.55
5.3.100.0130.05313.96
5.3.90.0200.04014.01
5.3.80.0200.06313.95
5.3.70.0200.04014.03
5.3.60.0200.06014.02
5.3.50.0130.04314.00
5.3.40.0230.07013.93
5.3.30.0230.07313.82
5.3.20.0200.06313.70
5.3.10.0230.03713.57
5.3.00.0330.05313.79
5.2.170.0230.05312.39
5.2.160.0230.06012.39
5.2.150.0200.04312.39
5.2.140.0200.04012.39
5.2.130.0230.03712.39
5.2.120.0200.05712.39
5.2.110.0270.05712.39
5.2.100.0230.06012.39
5.2.90.0270.03712.39
5.2.80.0330.05012.39
5.2.70.0200.06012.39
5.2.60.0230.05312.39
5.2.50.0230.05712.39
5.2.40.0200.05712.39
5.2.30.0130.04012.39
5.2.20.0100.06312.39
5.2.10.0200.04012.39
5.2.00.0170.03312.39
5.1.60.0170.02312.39
5.1.50.0130.05712.39
5.1.40.0100.02712.39
5.1.30.0130.02712.39
5.1.20.0200.04312.39
5.1.10.0130.02712.39
5.1.00.0170.04712.39
5.0.50.0100.02312.39
5.0.40.0070.02012.39
5.0.30.0200.02712.39
5.0.20.0100.02312.39
5.0.10.0130.03712.39
5.0.00.0070.03012.39
4.4.90.0070.03312.39
4.4.80.0030.02712.39
4.4.70.0100.01312.39
4.4.60.0070.01712.39
4.4.50.0070.01712.39
4.4.40.0200.03712.39
4.4.30.0100.01312.39
4.4.20.0030.03012.39
4.4.10.0070.02312.39
4.4.00.0100.05012.39
4.3.110.0200.01312.39
4.3.100.0130.03012.39
4.3.90.0100.02712.39
4.3.80.0100.05012.39
4.3.70.0130.03012.39
4.3.60.0130.01712.39
4.3.50.0070.03712.39
4.3.40.0100.02712.39
4.3.30.0070.02712.39
4.3.20.0070.01712.39
4.3.10.0100.03312.39
4.3.00.0030.03712.39

preferences:
49.93 ms | 400 KiB | 5 Q