3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [ 'a' => [ 'a1' => 'a1', 'a2' => 'a2', 'a3' => 'a3', ], 'b' => [ 'b1' => 'b1', 'b2' => 'b2', 'b3' => 'b3', ], ]; $it = new RecursiveIteratorIterator(RecursiveArrayIterator($a, RecursiveArrayIterator::CHILD_ARRAYS_ONLY)); $b = []; foreach ($it as $key => $value) { $b[$key] = $value; } var_dump($b);

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)
8.3.40.0040.01118.62
8.3.30.0000.01418.70
8.3.20.0080.00020.11
8.3.10.0040.00421.70
8.3.00.0030.00517.93
8.2.170.0120.00322.96
8.2.160.0080.00620.32
8.2.150.0000.00824.18
8.2.140.0000.00824.66
8.2.130.0040.00426.16
8.2.120.0060.00317.50
8.2.110.0100.00020.49
8.2.100.0030.00917.63
8.2.90.0040.00419.23
8.2.80.0040.00417.97
8.2.70.0030.00617.38
8.2.60.0040.00417.91
8.2.50.0000.00818.07
8.2.40.0040.00419.46
8.2.30.0080.00020.67
8.2.20.0000.00817.59
8.2.10.0040.00417.97
8.2.00.0000.00717.99
8.1.270.0070.01121.98
8.1.260.0050.00326.35
8.1.250.0050.00228.09
8.1.240.0060.00323.92
8.1.230.0040.00817.42
8.1.220.0060.00317.74
8.1.210.0060.00318.77
8.1.200.0060.00317.35
8.1.190.0040.00417.25
8.1.180.0000.00718.10
8.1.170.0070.00418.57
8.1.160.0040.00421.91
8.1.150.0050.00318.81
8.1.140.0060.00317.36
8.1.130.0040.00417.54
8.1.120.0070.00017.26
8.1.110.0080.00017.41
8.1.100.0040.00417.42
8.1.90.0070.00317.27
8.1.80.0000.00717.39
8.1.70.0000.00817.28
8.1.60.0060.00317.48
8.1.50.0040.00417.48
8.1.40.0070.00417.50
8.1.30.0000.00817.53
8.1.20.0040.00417.70
8.1.10.0000.00817.56
8.1.00.0030.00617.37
8.0.300.0030.00518.77
8.0.290.0030.00516.75
8.0.280.0030.00318.27
8.0.270.0000.00717.25
8.0.260.0000.00617.26
8.0.250.0030.00517.01
8.0.240.0030.00316.96
8.0.230.0050.00316.89
8.0.220.0030.00316.77
8.0.210.0040.00416.92
8.0.200.0000.00716.82
8.0.190.0040.00416.99
8.0.180.0000.00816.87
8.0.170.0000.00716.90
8.0.160.0040.00416.80
8.0.150.0060.00316.88
8.0.140.0040.00416.90
8.0.130.0000.00513.28
8.0.120.0050.00316.88
8.0.110.0040.00416.81
8.0.100.0000.00717.00
8.0.90.0030.00616.73
8.0.80.0090.01216.96
8.0.70.0040.00416.84
8.0.60.0000.00716.96
8.0.50.0030.00516.87
8.0.30.0090.00916.93
8.0.20.0090.01117.40
8.0.10.0050.00316.98
8.0.00.0110.00816.81
7.4.330.0050.00015.14
7.4.320.0000.00616.47
7.4.300.0060.00316.58
7.4.290.0030.00316.51
7.4.280.0060.00316.45
7.4.270.0030.00316.59
7.4.260.0040.00416.59
7.4.250.0040.00416.50
7.4.240.0020.00516.47
7.4.230.0070.00016.31
7.4.220.0070.01016.36
7.4.210.0070.00716.64
7.4.200.0000.00716.58
7.4.160.0060.00916.52
7.4.150.0070.01117.40
7.4.140.0080.01017.86
7.4.130.0110.00816.53
7.4.120.0080.00916.61
7.4.110.0120.00616.60
7.4.100.0140.00316.39
7.4.90.0120.00616.36
7.4.80.0090.00919.39
7.4.70.0130.00316.46
7.4.60.0060.01016.65
7.4.50.0050.00316.59
7.4.40.0060.01216.50
7.4.30.0130.00316.41
7.4.00.0060.00915.14
7.3.330.0030.00313.06
7.3.320.0020.00213.00
7.3.310.0030.00316.11
7.3.300.0030.00316.24
7.3.290.0040.01016.21
7.3.280.0080.00716.24
7.3.270.0090.01317.40
7.3.260.0140.00416.54
7.3.250.0120.00716.42
7.3.240.0140.00416.37
7.3.230.0060.01216.39
7.3.210.0080.00816.31
7.3.200.0100.01016.27
7.3.190.0130.00316.21
7.3.180.0080.00816.16
7.3.170.0110.00616.36
7.3.160.0110.00616.25
7.2.330.0100.00816.54
7.2.320.0030.01316.27
7.2.310.0040.01516.27
7.2.300.0040.01816.48
7.2.290.0100.00716.42
7.2.60.0030.01316.60
7.2.00.0030.01319.15
7.1.200.0040.00815.61
7.1.100.0060.00918.11
7.1.70.0040.00417.11
7.1.60.0110.01419.19
7.1.50.0000.01816.53
7.1.00.0030.07722.57
7.0.200.0000.00816.79
7.0.60.0070.08020.08
7.0.50.0130.07317.85
7.0.40.0000.07720.21
7.0.30.0370.07320.20
7.0.20.0300.07720.16
7.0.10.0070.07320.33
7.0.00.0030.08720.01
5.6.280.0000.07321.06
5.6.210.0000.08320.53
5.6.200.0030.07318.12
5.6.190.0030.05720.33
5.6.180.0570.06320.63
5.6.170.0300.07720.50
5.6.160.0000.04320.41
5.6.150.0070.06718.09
5.6.140.0070.04018.10
5.6.130.0100.08318.18
5.6.120.0100.06021.14
5.6.110.0070.08720.96
5.6.100.0200.07721.01
5.6.90.0100.08020.92
5.6.80.0100.07720.52
5.5.350.0270.07320.33
5.5.340.0100.07718.01
5.5.330.0100.08020.14
5.5.320.0170.06320.34
5.5.310.0200.08320.21
5.5.300.0000.04317.98
5.5.290.0000.04717.96
5.5.280.0100.05020.72
5.5.270.0100.08320.71
5.5.260.0070.07320.75
5.5.250.0070.08020.54
5.5.240.0000.08320.37
5.4.450.0730.04719.43
5.4.440.0600.05719.15
5.4.430.0600.05719.60
5.4.420.0800.07019.48
5.4.410.0670.05019.35
5.4.400.0670.05718.78
5.4.390.0430.07018.99
5.4.380.0630.06018.80
5.4.370.0600.06018.91
5.4.360.0630.05019.15
5.4.350.0630.05018.83
5.4.340.0530.06018.78
5.4.320.0830.05319.00
5.4.310.0630.05318.82
5.4.300.0800.05319.08
5.4.290.0730.05019.08
5.4.280.0670.04719.27
5.4.270.0630.05019.30
5.4.260.0530.05719.30
5.4.250.0570.07019.25
5.4.240.0700.04719.08
5.4.230.0500.06319.16
5.4.220.0600.05019.13
5.4.210.0870.06319.07
5.4.200.0500.06018.77
5.4.190.0700.05318.80
5.4.180.0600.05719.25
5.4.170.0670.04719.14
5.4.160.0700.05019.28
5.4.150.0670.05019.17
5.4.140.0770.07016.36
5.4.130.0870.03716.36
5.4.120.0770.05316.49
5.4.110.0530.05716.52
5.4.100.0700.06316.37
5.4.90.0630.05316.47
5.4.80.0470.05316.13
5.4.70.0170.03316.41
5.4.60.0130.03716.19
5.4.50.0330.05316.36
5.4.40.0270.06016.33
5.4.30.0300.03316.39
5.4.20.0230.05316.32
5.4.10.0200.04316.04

preferences:
29.56 ms | 400 KiB | 5 Q