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; } $result = mergeRecursive($arr); 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)
8.3.70.0080.00816.75
8.3.60.0190.00316.63
8.3.50.0190.00521.86
8.3.40.0060.01018.59
8.3.30.0110.00318.63
8.3.20.0000.00820.21
8.3.10.0050.00323.66
8.3.00.0080.00017.68
8.2.190.0150.00416.58
8.2.180.0070.00716.74
8.2.170.0040.01122.96
8.2.160.0030.01020.44
8.2.150.0050.00324.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0060.00317.75
8.2.110.0090.00020.92
8.2.100.0080.00417.91
8.2.90.0000.00817.97
8.2.80.0070.00417.97
8.2.70.0080.00017.50
8.2.60.0000.00817.93
8.2.50.0080.00018.07
8.2.40.0050.00818.95
8.2.30.0040.00420.52
8.2.20.0050.00217.68
8.2.10.0070.00018.14
8.2.00.0040.00418.18
8.1.280.0070.00725.92
8.1.270.0080.01223.92
8.1.260.0030.00626.35
8.1.250.0060.00328.09
8.1.240.0100.00722.48
8.1.230.0110.00020.89
8.1.220.0040.00417.78
8.1.210.0080.00018.85
8.1.200.0000.00917.36
8.1.190.0050.00317.38
8.1.180.0040.00418.10
8.1.170.0030.00620.37
8.1.160.0040.00422.00
8.1.150.0000.00718.97
8.1.140.0040.00419.70
8.1.130.0040.00417.77
8.1.120.0030.00317.49
8.1.110.0030.00617.51
8.1.100.0040.00417.45
8.1.90.0070.00017.38
8.1.80.0000.00717.38
8.1.70.0030.00317.36
8.1.60.0000.00717.57
8.1.50.0080.00017.55
8.1.40.0040.00417.57
8.1.30.0030.00617.58
8.1.20.0000.00717.50
8.1.10.0000.00717.63
8.1.00.0040.00417.39
8.0.300.0040.00420.04
8.0.290.0070.00016.88
8.0.280.0000.00718.47
8.0.270.0040.00417.28
8.0.260.0030.00517.28
8.0.250.0070.00016.95
8.0.240.0030.00317.06
8.0.230.0030.00517.10
8.0.220.0000.00616.95
8.0.210.0080.00016.96
8.0.200.0000.00716.96
8.0.190.0040.00416.97
8.0.180.0050.00316.96
8.0.170.0080.00016.99
8.0.160.0000.00716.98
8.0.150.0000.00716.89
8.0.140.0030.00516.97
8.0.130.0080.00013.39
8.0.120.0030.00516.93
8.0.110.0000.00816.82
8.0.100.0000.00816.80
8.0.90.0030.00316.80
8.0.80.0040.01116.86
8.0.70.0050.00216.82
8.0.60.0000.00817.02
8.0.50.0000.00716.97
8.0.30.0090.00917.12
8.0.20.0100.00917.40
8.0.10.0070.00017.11
8.0.00.0110.00816.63
7.4.330.0050.00015.08
7.4.320.0030.00316.68
7.4.300.0070.00016.63
7.4.290.0030.00316.59
7.4.280.0040.00416.55
7.4.270.0030.00316.64
7.4.260.0000.00816.53
7.4.250.0000.00716.35
7.4.240.0040.00416.48
7.4.230.0040.00416.53
7.4.220.0070.01016.72
7.4.210.0110.00316.68
7.4.200.0030.00316.71
7.4.160.0060.00916.45
7.4.150.0200.00017.40
7.4.140.0100.01117.86
7.4.130.0150.00916.65
7.4.120.0080.00916.55
7.4.110.0120.00616.58
7.4.100.0090.01316.45
7.4.90.0140.00316.57
7.4.80.0070.01019.39
7.4.70.0120.00916.59
7.4.60.0090.00916.57
7.4.50.0040.00416.59
7.4.40.0130.00316.27
7.4.30.0060.00916.51
7.4.00.0090.00614.97
7.3.330.0060.00013.37
7.3.320.0000.00513.39
7.3.310.0040.00416.42
7.3.300.0030.00316.26
7.3.290.0040.01016.38
7.3.280.0080.01116.41
7.3.270.0070.01017.40
7.3.260.0060.01116.60
7.3.240.0110.00616.52
7.3.230.0120.00616.50
7.3.210.0070.01116.52
7.3.200.0130.00616.38
7.3.190.0090.01316.60
7.3.180.0050.01116.54
7.3.170.0110.00716.69
7.3.160.0030.01416.44
7.3.10.0040.01216.73
7.3.00.0000.01116.70
7.2.330.0090.00916.80
7.2.320.0070.01116.46
7.2.310.0100.01316.73
7.2.300.0170.00316.62
7.2.290.0070.01116.50
7.2.130.0030.01017.02
7.2.120.0040.00716.88
7.2.110.0000.00916.67
7.2.100.0030.01016.63
7.2.90.0000.01416.89
7.2.80.0100.00317.04
7.2.70.0100.00316.96
7.2.60.0070.00516.90
7.2.50.0070.00416.93
7.2.40.0090.00616.98
7.2.30.0000.01416.73
7.2.20.0040.00816.80
7.2.10.0070.00716.89
7.2.00.0020.01218.05
7.1.250.0060.01015.89
7.1.200.0030.00915.47
7.1.100.0070.01018.39
7.1.70.0120.00417.16
7.1.60.0100.00319.11
7.1.50.0100.02034.72
7.1.00.0000.08022.46
7.0.200.0460.00714.38
7.0.60.0130.03320.08
7.0.50.0070.08317.98
7.0.40.0100.08020.27
7.0.30.0200.07020.07
7.0.20.0300.08320.30
7.0.10.0100.05020.33
7.0.00.0030.05720.05
5.6.280.0000.03320.90
5.6.210.0130.03320.50
5.6.200.0130.03018.19
5.6.190.0030.06320.52
5.6.180.3570.03720.66
5.6.170.0230.05720.50
5.6.160.0070.07020.44
5.6.150.0070.03718.16
5.6.140.0030.07318.18
5.6.130.0100.07718.28
5.6.120.0070.07720.99
5.6.110.0000.06021.13
5.6.100.0100.07020.96
5.6.90.0130.07720.97
5.6.80.0070.07720.41
5.6.70.0030.04320.38
5.5.350.0170.06020.45
5.5.340.0000.05318.05
5.5.330.0100.04720.57
5.5.320.0270.04320.27
5.5.310.0270.07320.28
5.5.300.0100.08017.95
5.5.290.0000.08017.99
5.5.280.0170.06320.97
5.5.270.0130.07720.88
5.5.260.0170.07020.78
5.5.250.0030.05720.70
5.5.240.0200.07720.14
5.4.450.0900.05319.48
5.4.440.0800.05319.48
5.4.430.0530.06319.58
5.4.420.0600.05319.47
5.4.410.0700.05019.07
5.4.400.0600.05318.84
5.4.390.0570.05719.25
5.4.380.0700.06019.29
5.4.370.0600.05319.01
5.4.360.0630.05719.29
5.4.350.0530.06019.22
5.4.340.0730.04319.13
5.4.320.0630.05319.14
5.4.310.0630.05319.26
5.4.300.1070.06719.13
5.4.290.0770.05318.86
5.4.280.0830.05019.21
5.4.270.0800.05018.97
5.4.260.0730.05319.26
5.4.250.0830.05019.27
5.4.240.0800.06019.25
5.4.230.0630.05318.86
5.4.220.0930.08019.29
5.4.210.0600.05719.14
5.4.200.0830.05719.25
5.4.190.0900.04018.83
5.4.180.0700.05718.96
5.4.170.0700.06318.96
5.4.160.0800.04718.85
5.4.150.0800.06319.04
5.4.140.0870.04316.54
5.4.130.0770.04716.39
5.4.120.0800.04316.35
5.4.110.0730.05316.52
5.4.100.0800.05016.63
5.4.90.0800.04716.57
5.4.80.0870.05316.27
5.4.70.0800.04716.59
5.4.60.0830.04316.50
5.4.50.0700.05716.59
5.4.40.0700.04016.59
5.4.30.0670.04316.62
5.4.20.0870.04016.48
5.4.10.0770.05716.50
5.4.00.0770.05015.97

preferences:
61.88 ms | 401 KiB | 5 Q