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); $this->b->test(); } public function test() { echo ($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)
8.3.40.0120.00318.61
8.3.30.0070.00719.23
8.3.20.0000.00819.99
8.3.10.0030.00522.09
8.3.00.0050.00322.51
8.2.170.0140.00422.96
8.2.160.0040.01121.04
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0060.00326.16
8.2.120.0000.00919.25
8.2.110.0070.00422.12
8.2.100.0070.00717.78
8.2.90.0040.00419.09
8.2.80.0040.00417.97
8.2.70.0060.00317.75
8.2.60.0030.00617.93
8.2.50.0060.00318.07
8.2.40.0050.00318.22
8.2.30.0040.00418.09
8.2.20.0030.00517.67
8.2.10.0000.00817.60
8.2.00.0040.00417.66
8.1.270.0040.00422.19
8.1.260.0040.00426.35
8.1.250.0050.00328.09
8.1.240.0080.00023.84
8.1.230.0030.00919.12
8.1.220.0050.00317.74
8.1.210.0050.00318.77
8.1.200.0030.00617.25
8.1.190.0060.00317.53
8.1.180.0050.00318.10
8.1.170.0030.00618.50
8.1.160.0070.00021.95
8.1.150.0070.00018.42
8.1.140.0020.00517.24
8.1.130.0000.00717.65
8.1.120.0070.00317.25
8.1.110.0040.00417.37
8.1.100.0050.00217.39
8.1.90.0000.00717.30
8.1.80.0070.00017.28
8.1.70.0030.00317.26
8.1.60.0060.00317.61
8.1.50.0040.00417.54
8.1.40.0040.00417.52
8.1.30.0050.00317.52
8.1.20.0030.00517.65
8.1.10.0030.00617.57
8.1.00.0040.00417.53
8.0.300.0070.00018.77
8.0.290.0000.00817.04
8.0.280.0030.00318.38
8.0.270.0000.00817.25
8.0.260.0000.00716.88
8.0.250.0000.00717.00
8.0.240.0040.00417.03
8.0.230.0000.00716.84
8.0.220.0000.00716.84
8.0.210.0030.00316.88
8.0.200.0040.00416.88
8.0.190.0000.00816.82
8.0.180.0060.00616.95
8.0.170.0000.00716.74
8.0.160.0060.00316.84
8.0.150.0040.00416.68
8.0.140.0040.00416.75
8.0.130.0000.00613.32
8.0.120.0080.00016.93
8.0.110.0080.00016.92
8.0.100.0000.00716.77
8.0.90.0040.00316.95
8.0.80.0060.00916.83
8.0.70.0000.00716.69
8.0.60.0040.00416.76
8.0.50.0040.00416.84
8.0.30.0070.01317.13
8.0.20.0090.00917.40
8.0.10.0040.00416.99
8.0.00.0110.01116.70
7.4.330.0050.00015.14
7.4.320.0000.00716.43
7.4.300.0060.00016.52
7.4.290.0030.00316.46
7.4.280.0040.00416.55
7.4.270.0030.00316.42
7.4.260.0050.00516.49
7.4.250.0040.00416.40
7.4.240.0050.00216.50
7.4.230.0050.00316.28
7.4.220.0070.01016.58
7.4.210.0080.00816.45
7.4.200.0030.00316.43
7.4.190.0040.00416.32
7.4.160.0080.00816.57
7.4.150.0090.01317.40
7.4.140.0150.00817.86
7.4.130.0100.00716.67
7.4.120.0080.00816.50
7.4.110.0040.01216.33
7.4.100.0070.01016.60
7.4.90.0030.01416.38
7.4.80.0030.01319.39
7.4.70.0110.00516.44
7.4.60.0130.00316.56
7.4.50.0040.00416.48
7.4.40.0090.00622.77
7.4.30.0060.01216.58
7.4.00.0070.01015.11
7.3.330.0050.00013.37
7.3.320.0020.00213.21
7.3.310.0000.00716.39
7.3.300.0000.00716.32
7.3.290.0040.01116.40
7.3.280.0120.00716.34
7.3.270.0040.01517.40
7.3.260.0120.00816.64
7.3.250.0140.00616.45
7.3.240.0090.00916.57
7.3.230.0060.01316.50
7.3.210.0030.01316.31
7.3.200.0160.00419.39
7.3.190.0060.01316.64
7.3.180.0100.00716.64
7.3.170.0140.00316.58
7.3.160.0100.00716.53
7.3.120.0070.00714.82
7.2.330.0140.00416.56
7.2.320.0130.00616.88
7.2.310.0060.00916.70
7.2.300.0030.01316.78
7.2.290.0050.01116.75
7.2.60.0070.01016.98
7.2.00.0070.01019.41
7.1.200.0000.01215.74
7.1.100.0140.00018.11
7.1.70.0060.00317.20
7.1.60.0100.01419.82
7.1.50.0100.01317.11
7.1.00.0070.07322.36
7.0.200.0050.00216.61
7.0.140.0030.07322.23
7.0.60.0100.08019.98
7.0.50.0130.07017.82
7.0.40.0100.03720.05
7.0.30.0130.04720.08
7.0.20.0270.06020.12
7.0.10.0300.07720.10
7.0.00.0070.03720.26
5.6.280.0070.07021.03
5.6.210.0170.06320.49
5.6.200.0100.05018.20
5.6.190.0100.07020.63
5.6.180.3370.04320.34
5.6.170.0170.04720.51
5.6.160.0030.04020.61
5.6.150.0100.07718.19
5.6.140.0030.08318.20
5.6.130.0070.08318.24
5.6.120.0100.05721.04
5.6.110.0100.06020.97
5.6.100.0130.05021.03
5.6.90.0070.07320.97
5.6.80.0130.05320.41
5.5.350.0030.08320.40
5.5.340.0130.06717.99
5.5.330.0030.08320.43
5.5.320.0230.06720.30
5.5.310.0400.06720.34
5.5.300.0100.03318.04
5.5.290.0070.08018.01
5.5.280.0130.03320.88
5.5.270.0100.08720.98
5.5.260.0030.06720.77
5.5.250.0100.08020.62
5.5.240.0000.05720.12
5.4.450.0070.06319.31
5.4.440.0070.05019.41
5.4.430.0030.05719.48
5.4.420.0000.08319.27
5.4.410.0030.08019.36
5.4.400.0030.07719.32
5.4.390.0030.06318.95
5.4.380.0000.04019.06
5.4.370.0030.07319.22
5.4.360.0030.07719.05
5.4.350.0030.05719.05
5.4.340.0030.05719.23
5.4.320.0000.08019.26
5.4.310.0000.05319.09
5.4.300.0070.04019.08
5.4.290.0000.04019.09
5.4.280.0030.08019.31
5.4.270.0070.06319.14
5.4.260.0070.05719.08
5.4.250.0070.04319.05
5.4.240.0000.07319.31
5.4.230.0000.07019.18
5.4.220.0000.07318.96
5.4.210.0000.07719.08
5.4.200.0030.06019.21
5.4.190.0100.07018.86
5.4.180.0030.07019.19
5.4.170.0030.07318.89
5.4.160.0030.06718.96
5.4.150.0030.08018.83
5.4.140.0100.06316.39
5.4.130.0000.06316.56
5.4.120.0030.04316.35
5.4.110.0100.07016.31
5.4.100.0000.07316.52
5.4.90.0000.07316.66
5.4.80.0070.06316.55
5.4.70.0100.07016.55
5.4.60.0030.04016.43
5.4.50.0070.06316.24
5.4.40.0000.05716.51
5.4.30.0030.04316.51
5.4.20.0100.06316.30
5.4.10.0070.04316.32
5.4.00.0070.05315.82
5.3.290.0030.05714.76
5.3.280.0030.07014.57
5.3.270.0030.07014.83
5.3.260.0030.07314.62
5.3.250.0070.04714.54
5.3.240.0030.05314.60
5.3.230.0030.07314.76
5.3.220.0030.07014.57
5.3.210.0070.07014.54
5.3.200.0000.07014.79
5.3.190.0030.07014.62
5.3.180.0030.06014.57
5.3.170.0000.07714.57
5.3.160.0030.05714.54
5.3.150.0030.05714.54
5.3.140.0000.07314.64
5.3.130.0070.07314.67
5.3.120.0000.08014.57
5.3.110.0030.05014.52
5.3.100.0000.04714.12
5.3.90.0070.07313.95
5.3.80.0030.06314.04
5.3.70.0030.07713.95
5.3.60.0070.04013.95
5.3.50.0030.07013.95
5.3.40.0000.07314.03
5.3.30.0030.06313.95
5.3.20.0030.05013.95
5.3.10.0070.06713.95
5.3.00.0000.05013.95
5.2.170.0030.05313.95
5.2.160.0000.06013.95
5.2.150.0000.06013.95
5.2.140.0000.05713.95
5.2.130.0030.05313.95
5.2.120.0000.06313.95
5.2.110.0000.04313.95
5.2.100.0030.06313.95
5.2.90.0030.06313.95
5.2.80.0000.03013.95
5.2.70.0030.02713.95
5.2.60.0000.06313.95
5.2.50.0070.04713.95
5.2.40.0070.06013.95
5.2.30.0030.05013.95
5.2.20.0070.05013.95
5.2.10.0000.06013.95
5.2.00.0030.05313.95
5.1.60.0030.05013.95
5.1.50.0030.05013.95
5.1.40.0030.05013.95
5.1.30.0030.04713.95
5.1.20.0070.04713.95
5.1.10.0130.04013.95
5.1.00.0030.05013.95
5.0.50.0070.04013.95
5.0.40.0000.03713.95
5.0.30.0030.05713.95
5.0.20.0000.02713.95
5.0.10.0000.03013.95
5.0.00.0030.06713.95
4.4.90.0030.03713.95
4.4.80.0030.03313.95
4.4.70.0000.03313.95
4.4.60.0030.03313.95
4.4.50.0070.02013.95
4.4.40.0000.05713.95
4.4.30.0070.02313.95
4.4.20.0000.03013.95
4.4.10.0030.03013.95
4.4.00.0030.05013.95
4.3.110.0000.03013.95
4.3.100.0100.03013.95
4.3.90.0000.04013.95
4.3.80.0070.04313.95
4.3.70.0030.01713.95
4.3.60.0000.03713.95
4.3.50.0000.03013.95
4.3.40.0030.03713.95
4.3.30.0000.02713.95
4.3.20.0000.03313.95
4.3.10.0070.02013.95
4.3.00.0070.03313.95

preferences:
45.67 ms | 400 KiB | 5 Q