3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [ "one" => "one", "two" => "two", "group1" => [ "three" => "three", "four" => "four", "group2" => [ "five" => "five", ], ], "group3" => [ "six" => "six", ] ]; function mergeRecursive(array $array, $result = []) { foreach($array as $k => $v) { if(!is_array($array)) $result[] = $v; else $result[] = $k . mergeRecursive($v); } return $result; } $result = mergeRecursive($array); print_r($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)
8.3.60.0090.00916.63
8.3.50.0160.00722.04
8.3.40.0090.00618.96
8.3.30.0140.00018.70
8.3.20.0030.00620.13
8.3.10.0000.00723.61
8.3.00.0000.00817.89
8.2.180.0110.01117.00
8.2.170.0120.00922.96
8.2.160.0080.00520.22
8.2.150.0000.00824.18
8.2.140.0000.00924.66
8.2.130.0080.00026.16
8.2.120.0080.00017.25
8.2.110.0100.00020.96
8.2.100.0080.00417.78
8.2.90.0040.00417.90
8.2.80.0030.00917.97
8.2.70.0030.00617.50
8.2.60.0000.00817.79
8.2.50.0000.00818.07
8.2.40.0100.00019.24
8.2.30.0000.00720.57
8.2.20.0040.00417.62
8.2.10.0040.00418.13
8.2.00.0000.00717.97
8.1.280.0120.00325.92
8.1.270.0120.00623.92
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0000.00822.57
8.1.230.0080.00320.98
8.1.220.0040.00417.74
8.1.210.0060.00318.91
8.1.200.0060.00317.13
8.1.190.0000.00817.25
8.1.180.0080.00018.10
8.1.170.0030.00620.15
8.1.160.0000.00722.04
8.1.150.0030.00318.84
8.1.140.0030.00519.45
8.1.130.0020.00517.66
8.1.120.0030.00417.28
8.1.110.0050.00317.40
8.1.100.0040.00417.41
8.1.90.0070.00017.43
8.1.80.0040.00417.41
8.1.70.0000.00717.43
8.1.60.0040.00417.62
8.1.50.0050.00317.45
8.1.40.0030.00517.57
8.1.30.0000.00817.57
8.1.20.0070.00017.68
8.1.10.0000.00717.50
8.1.00.0030.00517.48
8.0.300.0050.00319.86
8.0.290.0050.00216.63
8.0.280.0040.00418.31
8.0.270.0070.00017.21
8.0.260.0030.00317.25
8.0.250.0040.00317.00
8.0.240.0040.00416.87
8.0.230.0020.00517.00
8.0.220.0030.00316.80
8.0.210.0000.00716.81
8.0.200.0030.00316.95
8.0.190.0080.00016.87
8.0.180.0000.00816.88
8.0.170.0000.00816.97
8.0.160.0040.00416.84
8.0.150.0050.00216.79
8.0.140.0040.00416.75
8.0.130.0060.00013.38
8.0.120.0080.00016.84
8.0.110.0070.00016.83
8.0.100.0050.00316.78
8.0.90.0040.00416.75
8.0.80.0060.01516.95
8.0.70.0000.00716.80
8.0.60.0040.00416.82
8.0.50.0050.00316.88
8.0.30.0050.01116.99
8.0.20.0100.00917.41
8.0.10.0080.00017.00
8.0.00.0070.01016.71
7.4.330.0000.00615.08
7.4.320.0030.00316.55
7.4.300.0000.00716.52
7.4.290.0040.00416.59
7.4.280.0070.00016.48
7.4.270.0000.00716.54
7.4.260.0030.00516.43
7.4.250.0000.00716.51
7.4.240.0070.00016.54
7.4.230.0040.00416.60
7.4.220.0090.00916.54
7.4.210.0000.01316.41
7.4.200.0070.00016.64
7.4.160.0000.01416.39
7.4.150.0090.00917.40
7.4.140.0170.00317.86
7.4.130.0110.00816.55
7.4.120.0040.01416.46
7.4.110.0090.00916.45
7.4.100.0090.01216.43
7.4.90.0070.01016.52
7.4.80.0070.01019.39
7.4.70.0130.01016.48
7.4.60.0100.00716.58
7.4.50.0060.00316.18
7.4.40.0100.00716.59
7.4.30.0070.01516.39
7.4.00.0080.00914.70
7.3.330.0000.00513.29
7.3.320.0050.00013.31
7.3.310.0000.00716.21
7.3.300.0030.00316.15
7.3.290.0020.01116.31
7.3.280.0090.01016.28
7.3.270.0080.00817.40
7.3.260.0090.00916.58
7.3.240.0070.01216.49
7.3.230.0040.01416.51
7.3.210.0050.01416.27
7.3.200.0030.01516.46
7.3.190.0110.00716.35
7.3.180.0130.00716.54
7.3.170.0090.01116.54
7.3.160.0090.00616.39
7.3.120.0070.01014.74
7.3.110.0030.01514.70
7.3.100.0040.01514.50
7.3.90.0120.00614.45
7.3.80.0070.00714.55
7.3.70.0070.01114.54
7.3.60.0060.00614.88
7.3.50.0060.00914.93
7.3.40.0060.00614.63
7.3.30.0090.00914.58
7.3.20.0080.00816.49
7.3.10.0060.00916.47
7.3.00.0040.00616.69
7.2.330.0090.01216.40
7.2.320.0150.00416.60
7.2.310.0090.01216.31
7.2.300.0070.01016.55
7.2.290.0080.01316.43
7.2.250.0060.01214.85
7.2.240.0000.01615.01
7.2.230.0100.00314.95
7.2.220.0070.00714.83
7.2.210.0060.01214.94
7.2.200.0000.00914.75
7.2.190.0040.01214.96
7.2.180.0000.01515.05
7.2.170.0090.00614.97
7.2.130.0060.00916.79
7.2.120.0080.00416.78
7.2.110.0090.00616.75
7.2.100.0060.00616.57
7.2.90.0060.00916.71
7.2.80.0180.00416.64
7.2.70.0100.00616.55
7.2.60.0140.00516.48
7.2.50.0070.01016.84
7.2.40.0070.00716.72
7.2.30.0030.00716.91
7.2.20.0070.00316.86
7.2.10.0120.00316.71
7.2.00.0070.00817.93
7.1.330.0070.01015.78
7.1.320.0070.01015.64
7.1.310.0100.00715.80
7.1.300.0090.00315.70
7.1.290.0060.00315.57
7.1.280.0070.00715.78
7.1.270.0100.00315.89
7.1.260.0090.00915.77
7.1.250.0070.00715.72
7.1.200.0000.01215.84
7.1.100.0000.01118.26
7.1.70.0090.01517.14
7.1.60.0040.00819.11
7.1.50.0130.01334.75
7.1.00.0000.08022.33
7.0.200.0150.00914.57
7.0.60.0100.06019.91
7.0.50.0100.05017.96
7.0.40.0230.06320.20
7.0.30.0270.08320.30
7.0.20.0200.07020.10
7.0.10.0200.06320.19
7.0.00.0030.09320.09
5.6.280.0030.03320.82
5.6.210.0030.04020.64
5.6.200.0030.06018.22
5.6.190.0070.04320.77
5.6.180.4130.04320.44
5.6.170.0230.08320.55
5.6.160.0030.07020.57
5.6.150.0130.06318.18
5.6.140.0030.08318.18
5.6.130.0100.07018.15
5.6.120.0070.07720.98
5.6.110.0130.07720.99
5.6.100.0170.06721.15
5.6.90.0030.08720.94
5.6.80.0030.07720.29
5.6.70.3400.02720.28
5.5.350.0170.07720.34
5.5.340.0030.04317.99
5.5.330.0100.04720.31
5.5.320.0230.04320.44
5.5.310.0170.05020.37
5.5.300.0070.07018.04
5.5.290.0100.07317.93
5.5.280.0100.07320.90
5.5.270.0070.03720.84
5.5.260.0100.08720.96
5.5.250.0030.08720.76
5.5.240.0100.07720.26
5.4.450.0170.08019.48
5.4.440.0230.06019.58
5.4.430.0170.07319.46
5.4.420.0230.08019.16
5.4.410.0300.08319.48
5.4.400.0300.06018.81
5.4.390.0170.06318.98
5.4.380.0100.07019.26
5.4.370.0100.07019.29
5.4.360.0430.06319.29
5.4.350.0170.08019.23
5.4.340.0200.07719.26
5.4.320.0200.05018.98
5.4.310.0100.06019.38
5.4.300.0200.05319.14
5.4.290.0270.04719.38
5.4.280.0170.07019.25
5.4.270.0230.05319.38
5.4.260.0370.05718.87
5.4.250.0300.06319.05
5.4.240.0270.07019.12
5.4.230.0230.07719.29
5.4.220.0230.07718.72
5.4.210.0170.06019.10
5.4.200.0370.05719.15
5.4.190.0170.05319.07
5.4.180.0130.05719.14
5.4.170.0230.05018.86
5.4.160.0200.05019.29
5.4.150.0270.07319.13
5.4.140.0300.06316.31
5.4.130.0230.05016.44
5.4.120.0400.04016.51
5.4.110.0300.06716.53
5.4.100.0230.05316.19
5.4.90.0170.05016.45
5.4.80.0170.06016.63
5.4.70.0270.06316.60
5.4.60.0330.05716.62
5.4.50.0200.04316.60
5.4.40.0170.04316.27
5.4.30.0500.05016.57
5.4.20.0630.04316.22
5.4.10.0800.04016.38
5.4.00.0730.05315.79

preferences:
44.1 ms | 401 KiB | 5 Q