3v4l.org

run code in 300+ PHP versions simultaneously
<?php class a { private $b; function __construct($b = NULL) { if ($b) $this->b = $b; else $this->b = new b($this); } public function test() { echo ($this->b !== NULL) ? __METHOD__.":: b not NULL\n" : __METHOD__." :: b NULL\n"; } } class b { function __construct($a) { $a->test(); } } new a;

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)
8.3.70.0070.01116.63
8.3.60.0070.00718.27
8.3.50.0120.00522.11
8.3.40.0070.00718.81
8.3.30.0000.01419.23
8.3.20.0080.00020.33
8.3.10.0000.00822.05
8.3.00.0060.00322.42
8.2.180.0080.00816.75
8.2.170.0060.00922.96
8.2.160.0070.00720.80
8.2.150.0030.00524.18
8.2.140.0040.00424.66
8.2.130.0110.00726.16
8.2.120.0000.00819.78
8.2.110.0000.00922.21
8.2.100.0080.00418.03
8.2.90.0030.00619.13
8.2.80.0060.00317.97
8.2.70.0000.00817.50
8.2.60.0060.00317.93
8.2.50.0030.00618.22
8.2.40.0030.00620.59
8.2.30.0000.00719.12
8.2.20.0060.00317.70
8.2.10.0020.00517.61
8.2.00.0070.00017.53
8.1.280.0060.01225.92
8.1.270.0170.00022.14
8.1.260.0040.00426.35
8.1.250.0000.00728.09
8.1.240.0060.00320.96
8.1.230.0000.01120.32
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0030.00617.35
8.1.190.0100.00317.00
8.1.180.0080.00018.10
8.1.170.0080.00018.65
8.1.160.0020.00518.63
8.1.150.0030.00520.05
8.1.140.0050.00317.31
8.1.130.0000.00717.75
8.1.120.0040.00717.23
8.1.110.0000.00817.27
8.1.100.0090.00017.31
8.1.90.0050.00217.39
8.1.80.0000.00717.45
8.1.70.0030.00317.39
8.1.60.0050.00317.46
8.1.50.0050.00217.48
8.1.40.0040.00417.53
8.1.30.0000.00717.65
8.1.20.0040.00417.55
8.1.10.0040.00417.45
8.1.00.0070.00017.39
8.0.300.0040.00418.78
8.0.290.0070.00016.75
8.0.280.0030.00318.31
8.0.270.0000.00717.21
8.0.260.0000.00716.82
8.0.250.0000.00716.86
8.0.240.0000.00716.99
8.0.230.0000.00716.84
8.0.220.0070.00016.80
8.0.210.0000.00716.66
8.0.200.0030.00316.71
8.0.190.0040.00416.72
8.0.180.0030.00716.88
8.0.170.0000.00716.74
8.0.160.0040.00416.74
8.0.150.0040.00416.65
8.0.140.0000.00816.73
8.0.130.0030.00313.27
8.0.120.0040.00416.70
8.0.110.0000.00716.66
8.0.100.0030.00416.70
8.0.90.0070.00016.67
8.0.80.0090.00616.70
8.0.70.0040.00416.65
8.0.60.0070.00016.66
8.0.50.0000.00816.93
8.0.30.0140.00916.98
8.0.20.0080.01117.42
8.0.10.0040.00416.89
8.0.00.0110.00716.58
7.4.330.0050.00015.00
7.4.320.0060.00016.46
7.4.300.0000.00616.34
7.4.290.0000.00616.50
7.4.280.0040.00416.42
7.4.270.0080.00016.54
7.4.260.0000.01016.55
7.4.250.0050.00216.27
7.4.240.0050.00216.49
7.4.230.0000.00716.52
7.4.220.0070.01016.57
7.4.210.0080.00816.61
7.4.200.0070.00016.52
7.4.190.0050.00316.64
7.4.160.0060.00916.52
7.4.150.0040.01517.40
7.4.140.0100.00817.86
7.4.130.0100.01016.53
7.4.120.0130.00416.53
7.4.110.0040.01216.48
7.4.100.0170.00416.41
7.4.90.0070.01016.44
7.4.80.0150.00719.39
7.4.70.0060.01016.57
7.4.60.0130.00316.47
7.4.50.0000.00816.53
7.4.40.0100.00722.77
7.4.30.0100.00616.48
7.4.00.0100.00714.97
7.3.330.0020.00213.16
7.3.320.0000.00513.17
7.3.310.0000.00716.35
7.3.300.0040.00416.19
7.3.290.0070.00716.29
7.3.280.0050.01316.30
7.3.270.0110.00517.40
7.3.260.0130.00616.47
7.3.250.0130.00716.52
7.3.240.0160.00716.61
7.3.230.0090.00916.39
7.3.210.0060.01216.56
7.3.200.0090.00919.39
7.3.190.0030.01516.39
7.3.180.0080.00816.36
7.3.170.0100.00716.33
7.3.160.0060.01016.28
7.3.120.0060.00914.82
7.2.330.0100.01016.79
7.2.320.0030.01616.63
7.2.310.0100.00716.81
7.2.300.0130.00316.60
7.2.290.0100.00716.62
7.2.60.0140.00317.09
7.2.00.0040.01219.32
7.1.200.0080.00515.91
7.1.100.0080.00817.95
7.1.70.0030.01217.27
7.1.60.0100.01319.82
7.1.50.0000.01517.02
7.1.00.0070.07022.37
7.0.200.0000.00716.72
7.0.140.0030.07322.18
7.0.60.0100.07719.91
7.0.50.0030.04317.85
7.0.40.0200.06720.29
7.0.30.0270.06720.24
7.0.20.0400.06720.08
7.0.10.0270.06320.07
7.0.00.0070.06720.12
5.6.280.0000.08320.86
5.6.210.0170.07320.54
5.6.200.0030.09018.25
5.6.190.0100.08720.61
5.6.180.3530.04020.57
5.6.170.0170.05020.47
5.6.160.0200.07320.43
5.6.150.0030.08318.24
5.6.140.0030.07718.18
5.6.130.0000.06018.27
5.6.120.0130.05721.14
5.6.110.0030.04720.89
5.6.100.0100.07321.12
5.6.90.0030.04720.95
5.6.80.0030.07720.42
5.6.70.4400.03320.45
5.5.350.0070.07320.33
5.5.340.0030.05317.98
5.5.330.0100.03720.44
5.5.320.0230.06720.42
5.5.310.0330.04020.41
5.5.300.0070.03718.05
5.5.290.0070.07017.97
5.5.280.0100.07320.77
5.5.270.0100.07720.96
5.5.260.0170.06320.89
5.5.250.0100.07020.69
5.5.240.0100.07720.07
5.4.450.0370.05719.31
5.4.440.0500.05719.63
5.4.430.0070.06019.32
5.4.420.0170.05719.42
5.4.410.0100.05319.44
5.4.400.0800.00018.89
5.4.390.0630.00018.73
5.4.380.0370.04718.78
5.4.370.0530.05018.78
5.4.360.0200.05018.79
5.4.350.0300.05718.61
5.4.340.0300.04718.75
5.4.320.0080.03312.50
5.4.310.0060.03712.50
5.4.300.0070.03512.51
5.4.290.0060.03812.50
5.4.280.0100.04112.40
5.4.270.0100.05018.91
5.4.260.0030.05718.78
5.4.250.0100.05018.96
5.4.240.0170.06318.75
5.4.230.0130.06718.96
5.4.220.0130.07018.75
5.4.210.0100.05719.00
5.4.200.0100.06719.10
5.4.190.0070.05318.90
5.4.180.0130.06018.98
5.4.170.0130.06718.79
5.4.160.0100.06018.82
5.4.150.0030.05718.75
5.4.140.0130.04716.48
5.4.130.0130.06016.60
5.4.120.0100.06316.58
5.4.110.0070.05316.54
5.4.100.0030.05316.57
5.4.90.0030.05316.55
5.4.80.0030.05016.69
5.4.70.0100.04716.54
5.4.60.0170.03716.55
5.4.50.0030.07016.36
5.4.40.0100.06316.44
5.4.30.0000.05316.33
5.4.20.0170.06016.47
5.4.10.0100.05016.38
5.4.00.0030.05015.79
5.3.290.0050.04012.80
5.3.280.0030.05314.66
5.3.270.0130.05314.70
5.3.260.0130.04714.45
5.3.250.0030.05314.69
5.3.240.0030.05314.62
5.3.230.0030.05314.51
5.3.220.0200.04014.74
5.3.210.0070.05314.61
5.3.200.0130.04714.56
5.3.190.0100.05014.71
5.3.180.0070.05014.66
5.3.170.0070.05314.56
5.3.160.0130.04714.71
5.3.150.0100.04714.56
5.3.140.0100.04714.78
5.3.130.0070.07314.62
5.3.120.0070.05014.46
5.3.110.0030.06714.57
5.3.100.0100.05314.11
5.3.90.0070.04714.01
5.3.80.0030.05314.18
5.3.70.0070.05013.93
5.3.60.0170.06014.08
5.3.50.0170.05713.95
5.3.40.0100.04713.92
5.3.30.0100.04714.14
5.3.20.0030.06013.76
5.3.10.0170.05313.64
5.3.00.0130.05313.73
5.2.170.0100.04011.13
5.2.160.0000.04711.21
5.2.150.0070.05711.15
5.2.140.0200.04311.05
5.2.130.0030.06011.11
5.2.120.0070.03711.06
5.2.110.0130.04711.19
5.2.100.0000.06011.28
5.2.90.0070.04011.16
5.2.80.0100.05011.18
5.2.70.0030.04011.10
5.2.60.0100.05010.88
5.2.50.0070.03711.11
5.2.40.0170.03011.00
5.2.30.0070.05011.05
5.2.20.0100.04310.87
5.2.10.0130.03310.94
5.2.00.0170.03010.95
5.1.60.0100.02710.20
5.1.50.0030.03710.10
5.1.40.0000.04010.02
5.1.30.0070.03310.50
5.1.20.0070.03310.52
5.1.10.0130.03010.32
5.1.00.0100.05010.03
5.0.50.0070.0278.65
5.0.40.0030.0278.51
5.0.30.0030.0478.19
5.0.20.0100.0278.15
5.0.10.0070.0308.14
5.0.00.0070.0478.13
4.4.90.0070.0177.31
4.4.80.0030.0277.31
4.4.70.0070.0177.31
4.4.60.0100.0177.31
4.4.50.0070.0307.31
4.4.40.0070.0407.30
4.4.30.0030.0307.30
4.4.20.0000.0337.31
4.4.10.0030.0207.31
4.4.00.0000.0337.31
4.3.110.0000.0277.31
4.3.100.0100.0137.31
4.3.90.0000.0337.31
4.3.80.0070.0337.31
4.3.70.0070.0177.31
4.3.60.0070.0137.31
4.3.50.0000.0307.31
4.3.40.0000.0437.31
4.3.30.0070.0207.31
4.3.20.0000.0237.31
4.3.10.0070.0237.31
4.3.00.0070.0177.75

preferences:
42.33 ms | 401 KiB | 5 Q