3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Item { public static function &newWithParent(Item &$parent) { $item = new Item(); $item->parent = $parent; return $item; } private $parent; public function &getParent() { return $this->parent; } } $item = Item::newWithParent(Item::newWithParent(Item::newWithParent(new Item()))); // Basically it's this now: {"parent":{"parent":{"parent":{"parent":null}}}} // I want to set that null value $list = $item; var_dump($list); do { $item = $item->getParent(); if ($item->getParent() === null) { var_dump($item); $item = &Item::newWithParent($item); var_dump($item); break; } } while (true); var_dump($list);

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)
8.3.60.0140.00416.88
8.3.50.0080.00821.95
8.3.40.0000.01518.84
8.3.30.0040.01119.22
8.3.20.0080.00020.18
8.3.10.0000.00821.89
8.3.00.0040.00419.26
8.2.180.0090.00617.00
8.2.170.0080.00622.96
8.2.160.0070.00720.53
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0050.00526.16
8.2.120.0080.00022.15
8.2.110.0090.00022.13
8.2.100.0040.00717.91
8.2.90.0040.00419.23
8.2.80.0030.00517.97
8.2.70.0060.00317.63
8.2.60.0040.00417.80
8.2.50.0030.00718.07
8.2.40.0030.00618.20
8.2.30.0000.00717.94
8.2.20.0050.00217.76
8.2.10.0000.00717.93
8.2.00.0000.00717.72
8.1.280.0120.00325.92
8.1.270.0040.00422.01
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0060.00323.97
8.1.230.0000.01119.22
8.1.220.0050.00317.74
8.1.210.0000.00818.77
8.1.200.0070.00317.23
8.1.190.0040.00417.53
8.1.180.0000.01018.10
8.1.170.0000.01018.40
8.1.160.0040.00422.01
8.1.150.0000.00718.48
8.1.140.0080.00017.33
8.1.130.0000.00717.77
8.1.120.0050.00217.48
8.1.110.0040.00417.42
8.1.100.0030.00317.37
8.1.90.0000.00717.26
8.1.80.0000.00817.43
8.1.70.0000.00817.37
8.1.60.0060.00317.54
8.1.50.0000.00817.55
8.1.40.0030.00617.60
8.1.30.0090.00017.61
8.1.20.0000.00817.61
8.1.10.0080.00017.45
8.1.00.0040.00417.53
8.0.300.0080.00018.77
8.0.290.0000.00816.93
8.0.280.0030.00318.44
8.0.270.0000.00817.13
8.0.260.0030.00316.84
8.0.250.0030.00316.99
8.0.240.0040.00416.98
8.0.230.0040.00416.90
8.0.220.0030.00316.83
8.0.210.0050.00216.82
8.0.200.0050.00316.96
8.0.190.0040.00417.02
8.0.180.0050.00317.02
8.0.170.0050.00316.84
8.0.160.0040.00416.93
8.0.150.0000.00716.75
8.0.140.0050.00516.91
8.0.130.0030.00313.34
8.0.120.0040.00416.79
8.0.110.0000.00816.93
8.0.100.0040.00416.99
8.0.90.0020.00516.81
8.0.80.0100.01316.91
8.0.70.0040.00416.70
8.0.60.0040.00416.90
8.0.50.0050.00216.80
8.0.30.0120.00817.14
8.0.20.0100.00817.40
8.0.10.0000.00817.00
8.0.00.0090.01116.66
7.4.330.0000.00515.00
7.4.320.0030.00316.54
7.4.300.0000.00716.48
7.4.290.0000.00716.55
7.4.280.0000.00716.54
7.4.270.0040.00416.52
7.4.260.0030.00316.52
7.4.250.0050.00216.49
7.4.240.0000.00716.46
7.4.230.0070.00016.41
7.4.220.0240.00316.57
7.4.210.0080.00716.69
7.4.200.0000.00716.71
7.4.190.0080.00016.58
7.4.160.0120.00316.78
7.4.150.0050.01417.40
7.4.140.0130.00717.86
7.4.130.0070.01116.47
7.4.120.0120.00716.70
7.4.110.0110.01316.75
7.4.100.0090.00916.66
7.4.90.0040.01316.64
7.4.80.0100.00719.39
7.4.70.0080.01216.39
7.4.60.0030.01616.46
7.4.50.0030.00316.45
7.4.40.0030.01022.77
7.4.30.0170.00616.53
7.4.00.0070.00714.78
7.3.330.0030.00313.29
7.3.320.0030.00313.46
7.3.310.0030.00316.55
7.3.300.0030.00316.36
7.3.290.0140.00016.46
7.3.280.0110.00816.39
7.3.270.0060.01217.40
7.3.260.0090.00916.41
7.3.250.0120.00716.39
7.3.240.0100.00716.41
7.3.230.0140.00416.43
7.3.210.0180.00716.36
7.3.200.0130.01019.39
7.3.190.0140.00816.39
7.3.180.0070.01016.57
7.3.170.0120.00616.45
7.3.160.0110.00716.58
7.3.120.0040.01115.08
7.3.10.0030.00916.63
7.3.00.0060.00416.84
7.2.330.0130.00416.26
7.2.320.0120.00916.63
7.2.310.0070.00916.72
7.2.300.0130.00316.60
7.2.290.0090.00916.61
7.2.130.0100.00316.84
7.2.120.0090.00016.69
7.2.110.0070.01016.32
7.2.100.0060.00916.46
7.2.90.0030.01016.79
7.2.80.0090.00916.77
7.2.70.0070.01116.93
7.2.60.0070.00916.75
7.2.50.0130.00916.97
7.2.40.0040.01117.04
7.2.30.0060.01016.90
7.2.20.0080.00416.85
7.2.10.0040.00816.93
7.2.00.0040.01018.17
7.1.250.0050.00215.71
7.1.200.0000.01215.96
7.1.100.0120.00618.20
7.1.70.0000.00817.06
7.1.60.0130.01319.33
7.1.50.0090.01616.84
7.1.00.0030.07322.57
7.0.200.0000.00916.67
7.0.140.0000.07722.00
7.0.100.0030.05019.91
7.0.90.0100.07319.88
7.0.80.0000.05319.88
7.0.70.0100.07319.93
7.0.60.0100.03720.05
7.0.50.0100.07720.16
7.0.40.0000.05320.08
7.0.30.0230.06720.00
7.0.20.0070.08320.10
7.0.10.0030.08720.13
7.0.00.0030.06720.04
5.6.280.0100.06721.15
5.6.250.0130.05320.63
5.6.240.0130.07320.64
5.6.230.0100.05320.66
5.6.220.0000.04720.73
5.6.210.0000.05720.68
5.6.200.0170.04021.00
5.6.190.0030.08721.09
5.6.180.0130.04720.93
5.6.170.0100.05021.02
5.6.160.0170.04021.04
5.6.150.0000.05321.06
5.6.140.0030.07720.94
5.6.130.0000.08021.02
5.6.120.0170.08020.94
5.6.110.0130.04721.01
5.6.100.0070.07721.03
5.6.90.0070.08021.00
5.6.80.0000.06320.39
5.6.70.0100.08020.29
5.6.60.0170.07020.28
5.6.50.0100.07020.47
5.6.40.0000.04020.37
5.6.30.0070.04720.38
5.6.20.0100.05720.36
5.6.10.0170.07020.49
5.6.00.0070.04720.48
5.5.380.0100.07720.38
5.5.370.0100.04720.43
5.5.360.0100.06020.35
5.5.350.0100.08020.41
5.5.340.0030.05720.77
5.5.330.0030.09320.84
5.5.320.0100.07320.88
5.5.310.0130.06020.86
5.5.300.0130.07020.89
5.5.290.0030.05320.73
5.5.280.0170.06320.80
5.5.270.0070.07320.89
5.5.260.0100.06720.86
5.5.250.0130.07720.58
5.5.240.0030.06720.32
5.5.230.0030.04320.02
5.5.220.0030.07320.30
5.5.210.0100.03320.31
5.5.200.0070.07019.97
5.5.190.0030.04320.19
5.5.180.0100.07320.18
5.5.160.0000.04320.13
5.5.150.0070.03720.23
5.5.140.0070.03720.00
5.5.130.0030.04020.13
5.5.120.0130.03320.24
5.5.110.0030.04320.27
5.5.100.0030.04320.17
5.5.90.0100.03720.02
5.5.80.0070.03720.21
5.5.70.0030.04019.94
5.5.60.0070.04020.05
5.5.50.0030.06020.09
5.5.40.0100.03020.03
5.5.30.0030.07320.05
5.5.20.0070.03320.05
5.5.10.0000.04719.93
5.5.00.0170.03020.11
5.4.450.0130.06719.47
5.4.440.0170.07319.50
5.4.430.0030.04019.46
5.4.420.0030.07719.45
5.4.410.0070.03719.43
5.4.400.0100.06718.91
5.4.390.0070.07719.21
5.4.380.0000.05718.94
5.4.370.0070.03719.11
5.4.360.0170.07019.23
5.4.350.0130.06719.18
5.4.340.0070.05319.03
5.4.320.0070.03719.14
5.4.310.0030.03719.13
5.4.300.0000.04019.04
5.4.290.0000.04019.16
5.4.280.0030.04019.18
5.4.270.0030.04018.84
5.4.260.0070.03718.94
5.4.250.0000.04019.04
5.4.240.0070.04019.15
5.4.230.0030.04019.04
5.4.220.0030.03019.17
5.4.210.0030.03019.18
5.4.200.0030.03719.02
5.4.190.0030.04019.20
5.4.180.0000.05319.14
5.4.170.0030.04019.19
5.4.160.0000.06718.85
5.4.150.0100.03719.16
5.4.140.0000.04716.41
5.4.130.0000.04016.38
5.4.120.0000.04016.48
5.4.110.0000.04016.39
5.4.100.0030.03716.39
5.4.90.0000.04016.50
5.4.80.0070.03316.30
5.4.70.0000.03716.39
5.4.60.0100.03016.39
5.4.50.0030.03716.44
5.4.40.0070.03316.50
5.4.30.0000.04016.24
5.4.20.0030.03016.41
5.4.10.0070.03316.45
5.4.00.0030.03315.88
5.3.290.0070.03714.81
5.3.280.0030.03714.61
5.3.270.0030.04014.53
5.3.260.0000.04014.57
5.3.250.0030.03714.54
5.3.240.0070.03714.73
5.3.230.0100.03314.55
5.3.220.0100.03014.58
5.3.210.0030.03714.52
5.3.200.0000.04014.66
5.3.190.0030.03714.56
5.3.180.0030.03714.71
5.3.170.0030.04014.71
5.3.160.0030.04014.50
5.3.150.0000.04014.70
5.3.140.0000.04014.59
5.3.130.0000.04014.58
5.3.120.0000.03314.64
5.3.110.0000.04014.67
5.3.100.0030.03714.10
5.3.90.0070.03314.08
5.3.80.0070.03314.01
5.3.70.0000.04014.16
5.3.60.0100.02313.91
5.3.50.0130.02713.97
5.3.40.0070.03314.04
5.3.30.0070.03313.84
5.3.20.0030.02713.75
5.3.10.0030.02713.71
5.3.00.0000.05313.70
5.2.170.0000.02711.54
5.2.160.0030.02311.54
5.2.150.0070.02011.54
5.2.140.0070.02711.54
5.2.130.0070.02011.54
5.2.120.0000.03011.54
5.2.110.0030.02711.54
5.2.100.0070.02711.54
5.2.90.0030.04011.54
5.2.80.0030.02311.54
5.2.70.0070.02711.54
5.2.60.0070.03311.54
5.2.50.0030.06311.54
5.2.40.0100.03711.54
5.2.30.0000.06311.54
5.2.20.0000.03011.54
5.2.10.0100.05711.54
5.2.00.0070.03711.54
5.1.60.0000.03711.54
5.1.50.0030.04311.54
5.1.40.0070.04011.54
5.1.30.0030.03711.54
5.1.20.0000.02711.54
5.1.10.0070.02311.54
5.1.00.0070.03711.54
5.0.50.0000.04711.54
5.0.40.0070.03711.54
5.0.30.0000.03711.54
5.0.20.0000.02011.54
5.0.10.0030.02011.54
5.0.00.0000.06311.54
4.4.90.0000.02711.54
4.4.80.0030.03311.54
4.4.70.0000.01711.54
4.4.60.0000.02311.54
4.4.50.0030.01711.54
4.4.40.0070.04711.54
4.4.30.0070.03311.54
4.4.20.0000.03711.54
4.4.10.0070.02711.54
4.4.00.0030.04011.54
4.3.110.0000.02011.54
4.3.100.0030.03311.54
4.3.90.0000.03311.54
4.3.80.0030.05311.54
4.3.70.0070.02311.54
4.3.60.0000.04311.54
4.3.50.0000.01711.54
4.3.40.0000.05011.54
4.3.30.0000.02711.54
4.3.20.0000.03311.54
4.3.10.0030.02711.54
4.3.00.0000.03311.54

preferences:
47.53 ms | 401 KiB | 5 Q