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) { $item = &Item::newWithParent($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)
8.3.60.0100.01016.75
8.3.50.0130.00522.11
8.3.40.0120.00318.93
8.3.30.0080.00619.21
8.3.20.0040.00420.16
8.3.10.0050.00323.66
8.3.00.0060.00617.50
8.2.180.0170.00318.15
8.2.170.0100.01022.96
8.2.160.0100.00320.57
8.2.150.0080.00024.18
8.2.140.0050.00324.66
8.2.130.0180.00026.16
8.2.120.0070.00022.09
8.2.110.0060.00322.30
8.2.100.0000.01117.78
8.2.90.0000.00819.23
8.2.80.0050.00317.97
8.2.70.0050.00317.38
8.2.60.0000.00817.93
8.2.50.0040.00418.07
8.2.40.0040.00418.03
8.2.30.0080.00018.00
8.2.20.0070.00017.65
8.2.10.0040.00419.80
8.2.00.0030.00617.77
8.1.280.0100.01025.92
8.1.270.0080.00022.06
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0090.00023.87
8.1.230.0040.00719.07
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0060.00317.35
8.1.190.0000.00817.50
8.1.180.0000.00818.10
8.1.170.0100.00018.52
8.1.160.0040.00422.08
8.1.150.0050.00318.65
8.1.140.0000.00717.42
8.1.130.0040.00417.77
8.1.120.0040.00417.45
8.1.110.0000.00717.46
8.1.100.0070.00017.46
8.1.90.0040.00417.50
8.1.80.0000.00717.33
8.1.70.0070.00017.36
8.1.60.0060.00317.50
8.1.50.0030.00517.56
8.1.40.0050.00317.43
8.1.30.0040.00417.52
8.1.20.0000.00717.71
8.1.10.0050.00217.56
8.1.00.0080.00017.50
8.0.300.0000.00718.77
8.0.290.0080.00017.18
8.0.280.0000.00718.41
8.0.270.0000.00717.10
8.0.260.0030.00317.33
8.0.250.0000.00716.87
8.0.240.0000.00716.98
8.0.230.0050.00216.99
8.0.220.0000.00716.96
8.0.210.0050.00316.96
8.0.200.0000.00616.98
8.0.190.0040.00416.89
8.0.180.0030.00516.84
8.0.170.0040.00416.95
8.0.160.0000.00717.02
8.0.150.0030.00616.91
8.0.140.0030.00316.88
8.0.130.0040.00413.41
8.0.120.0050.00316.76
8.0.110.0040.00416.84
8.0.100.0030.00517.02
8.0.90.0000.00716.74
8.0.80.0060.01316.90
8.0.70.0070.00016.94
8.0.60.0000.00716.79
8.0.50.0050.00316.87
8.0.30.0120.01317.03
8.0.20.0150.00517.40
8.0.10.0070.00017.01
8.0.00.0080.01016.61
7.4.330.0030.00315.00
7.4.320.0000.00716.56
7.4.300.0000.00616.65
7.4.290.0100.00016.64
7.4.280.0030.00316.65
7.4.270.0030.00316.64
7.4.260.0070.00016.56
7.4.250.0070.00016.49
7.4.240.0000.00716.61
7.4.230.0000.00716.65
7.4.220.0130.01316.58
7.4.210.0110.00616.57
7.4.200.0030.00316.42
7.4.190.0030.00316.57
7.4.160.0030.01316.52
7.4.150.0210.00317.40
7.4.140.0070.01117.86
7.4.130.0090.01216.46
7.4.120.0090.00916.54
7.4.110.0120.01216.53
7.4.100.0040.01416.39
7.4.90.0090.00916.39
7.4.80.0120.00619.39
7.4.70.0060.01516.49
7.4.60.0040.01416.46
7.4.50.0030.00616.33
7.4.40.0130.00322.77
7.4.30.0100.00616.73
7.4.00.0060.00814.98
7.3.330.0030.00313.31
7.3.320.0050.00013.47
7.3.310.0030.00316.31
7.3.300.0030.00316.46
7.3.290.0130.01016.38
7.3.280.0050.01016.47
7.3.270.0110.00717.40
7.3.260.0100.00816.43
7.3.250.0130.00716.51
7.3.240.0100.00716.66
7.3.230.0110.00816.54
7.3.210.0150.00416.39
7.3.200.0060.01519.39
7.3.190.0070.01616.33
7.3.180.0060.01216.55
7.3.170.0110.00616.39
7.3.160.0110.00516.53
7.3.120.0070.01014.80
7.3.110.0070.01114.66
7.3.100.0090.00914.77
7.3.90.0090.00614.52
7.3.80.0070.01014.84
7.3.70.0030.01414.86
7.3.60.0120.00014.68
7.3.50.0100.01014.90
7.3.40.0060.00914.75
7.3.30.0060.00314.53
7.3.20.0030.01016.57
7.3.10.0050.00816.63
7.3.00.0100.00516.50
7.2.330.0120.00616.77
7.2.320.0120.00616.75
7.2.310.0100.00716.67
7.2.300.0060.01216.39
7.2.290.0090.00916.71
7.2.250.0000.01914.89
7.2.240.0100.01014.72
7.2.230.0040.01415.13
7.2.220.0090.00914.54
7.2.210.0040.01415.23
7.2.200.0110.00414.91
7.2.190.0100.00714.75
7.2.180.0140.00414.95
7.2.170.0000.01515.04
7.2.130.0030.01016.95
7.2.120.0020.00616.75
7.2.110.0050.00716.74
7.2.100.0120.00516.76
7.2.90.0080.00516.86
7.2.80.0100.00316.69
7.2.70.0110.00416.85
7.2.60.0110.00416.68
7.2.50.0080.00616.81
7.2.40.0030.00817.02
7.2.30.0070.00916.88
7.2.20.0070.00816.78
7.2.10.0040.00716.89
7.2.00.0070.00117.54
7.1.330.0070.00715.70
7.1.320.0030.01015.70
7.1.310.0090.00615.66
7.1.300.0030.01215.81
7.1.290.0070.01115.61
7.1.280.0030.01215.77
7.1.270.0070.00715.82
7.1.260.0060.00315.55
7.1.250.0090.00315.67
7.1.100.0060.00618.02
7.1.70.0000.01217.00
7.1.60.0040.00717.27
7.1.50.0000.02017.05
7.1.00.0130.08722.51
7.0.200.0030.01316.47
7.0.140.0030.06722.09
7.0.100.0330.08019.92
7.0.90.0270.08320.03
7.0.80.0230.08319.88
7.0.70.0270.08319.93
7.0.60.0070.09019.95
7.0.50.0330.08720.20
7.0.40.0030.04320.14
7.0.30.0130.08320.14
7.0.20.0170.07020.18
7.0.10.0030.05320.17
7.0.00.0130.04320.07
5.6.280.0030.07021.16
5.6.250.0070.07720.63
5.6.240.0070.06020.70
5.6.230.0100.06020.57
5.6.220.0030.08720.67
5.6.210.0070.07720.69
5.6.200.0130.07721.05
5.6.190.0200.07020.96
5.6.180.0070.07721.09
5.6.170.0000.08321.07
5.6.160.0100.05321.05
5.6.150.0130.06321.04
5.6.140.0030.05321.11
5.6.130.0070.04720.94
5.6.120.0070.05021.09
5.6.110.0100.04721.00
5.6.100.0070.04721.03
5.6.90.0000.09021.05
5.6.80.0000.04720.46
5.6.70.0200.05720.32
5.6.60.0030.06020.50
5.6.50.0130.07720.33
5.6.40.0130.04320.37
5.6.30.0030.06020.44
5.6.20.0070.07720.42
5.6.10.0100.04020.48
5.6.00.0100.05720.42
5.5.380.0100.04020.41
5.5.370.0170.06020.36
5.5.360.0100.08020.35
5.5.350.0030.05720.35
5.5.340.0130.06720.65
5.5.330.0070.05720.89
5.5.320.0130.06720.89
5.5.310.0030.08320.91
5.5.300.0000.06020.74
5.5.290.0070.04720.73
5.5.280.0100.08320.73
5.5.270.0030.05020.64
5.5.260.0000.07020.87
5.5.250.0130.07020.63
5.5.240.0100.04020.21
5.5.230.0130.04020.20
5.5.220.0100.05320.14
5.5.210.0100.08320.25
5.5.200.0130.04320.20
5.5.190.0000.08320.13
5.5.180.0130.07020.13
5.5.160.0100.03720.28
5.5.150.0130.06720.18
5.5.140.0030.07720.19
5.5.130.0070.07720.25
5.5.120.0100.04020.18
5.5.110.0000.07720.16
5.5.100.0070.08720.07
5.5.90.0070.06020.01
5.5.80.0070.07720.16
5.5.70.0070.06320.14
5.5.60.0070.06320.16
5.5.50.0100.06020.01
5.5.40.0030.05720.07
5.5.30.0130.07320.11
5.5.20.0000.07020.09
5.5.10.0100.04319.98
5.5.00.0100.04320.00
5.4.450.0100.09019.51
5.4.440.0070.05719.20
5.4.430.0170.05719.36
5.4.420.0070.06019.41
5.4.410.0070.07019.25
5.4.400.0000.07019.13
5.4.390.0030.04319.25
5.4.380.0030.04319.21
5.4.370.0070.06319.04
5.4.360.0070.04319.16
5.4.350.0100.07019.13
5.4.340.0000.08018.89
5.4.320.0030.07719.03
5.4.310.0100.07019.12
5.4.300.0070.04319.15
5.4.290.0030.08719.14
5.4.280.0100.04019.18
5.4.270.0030.05319.12
5.4.260.0000.07019.02
5.4.250.0000.05019.16
5.4.240.0030.03719.03
5.4.230.0070.05718.89
5.4.220.0030.04018.88
5.4.210.0030.03718.88
5.4.200.0070.07019.13
5.4.190.0130.02718.94
5.4.180.0130.06719.22
5.4.170.0100.03319.14
5.4.160.0030.03719.18
5.4.150.0030.05718.83
5.4.140.0070.05316.48
5.4.130.0030.08016.45
5.4.120.0000.07716.49
5.4.110.0070.03316.51
5.4.100.0070.06316.33
5.4.90.0030.03316.34
5.4.80.0100.05316.37
5.4.70.0000.03716.25
5.4.60.0030.07016.37
5.4.50.0030.04016.45
5.4.40.0030.03316.41
5.4.30.0130.03716.44
5.4.20.0000.07016.27
5.4.10.0000.03716.29
5.4.00.0000.08015.79
5.3.290.0130.07014.70
5.3.280.0100.07314.66
5.3.270.0070.07714.75
5.3.260.0030.04014.75
5.3.250.0030.03714.67
5.3.240.0100.05314.60
5.3.230.0100.02714.63
5.3.220.0100.05314.50
5.3.210.0030.07714.64
5.3.200.0030.07714.69
5.3.190.0000.08714.56
5.3.180.0030.06014.53
5.3.170.0030.03314.50
5.3.160.0030.06714.55
5.3.150.0070.05314.54
5.3.140.0030.07714.67
5.3.130.0030.07714.61
5.3.120.0030.05014.62
5.3.110.0070.05714.54
5.3.100.0130.05314.15
5.3.90.0100.06314.07
5.3.80.0070.05314.03
5.3.70.0070.03314.08
5.3.60.0070.05313.92
5.3.50.0070.07013.87
5.3.40.0030.03713.97
5.3.30.0030.07313.90
5.3.20.0100.02713.68
5.3.10.0000.05313.71
5.3.00.0000.03713.66
5.2.170.0000.03011.59
5.2.160.0130.05011.59
5.2.150.0030.05011.59
5.2.140.0070.04711.59
5.2.130.0070.05711.59
5.2.120.0100.05311.59
5.2.110.0030.02711.59
5.2.100.0000.04711.59
5.2.90.0030.02711.59
5.2.80.0070.02711.59
5.2.70.0000.03311.59
5.2.60.0030.06711.59
5.2.50.0030.06311.59
5.2.40.0100.02311.59
5.2.30.0000.03711.59
5.2.20.0070.02311.59
5.2.10.0000.04311.59
5.2.00.0070.05311.59
5.1.60.0030.03311.59
5.1.50.0100.04011.59
5.1.40.0000.03311.59
5.1.30.0030.05311.59
5.1.20.0070.02711.59
5.1.10.0070.05711.59
5.1.00.0070.03711.59
5.0.50.0000.03711.59
5.0.40.0000.02011.59
5.0.30.0030.06311.59
5.0.20.0000.03711.59
5.0.10.0000.02711.59
5.0.00.0030.06011.59
4.4.90.0070.01311.59
4.4.80.0000.02011.59
4.4.70.0070.02711.59
4.4.60.0030.01711.59
4.4.50.0030.03011.59
4.4.40.0030.05711.59
4.4.30.0030.04311.59
4.4.20.0000.02711.59
4.4.10.0070.04011.59
4.4.00.0000.05311.59
4.3.110.0030.03311.59
4.3.100.0030.03311.59
4.3.90.0030.02311.59
4.3.80.0030.05311.59
4.3.70.0000.03311.59
4.3.60.0000.02711.59
4.3.50.0030.02711.59
4.3.40.0000.05711.59
4.3.30.0000.02011.59
4.3.20.0000.01711.59
4.3.10.0000.03311.59
4.3.00.0030.01311.59

preferences:
41.61 ms | 401 KiB | 5 Q