3v4l.org

run code in 300+ PHP versions simultaneously
<?php ini_set("session.use_cookies", false); class A { public $b; public function __construct() { $this->b = new A(); } } // class B { // public $a; // public function __construct() { // $this->A = new A(); // } // } $a = new A(); // session_start(); // $id = session_id(); // $_SESSION['test'] = $a; // session_write_close(); // session_id('boo'); // session_start(); // session_write_close(); // session_id($id); // session_start(); // echo serialize($_SESSION['test']);

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)
8.3.60.0490.02378.98
8.3.50.0620.02679.21
8.3.40.0370.01347.58
8.3.30.0240.03547.54
8.3.20.0210.00649.25
8.3.10.0100.01047.66
8.3.00.0140.00748.06
8.2.180.0630.03078.54
8.2.170.0540.01347.76
8.2.160.0260.00749.34
8.2.150.0140.01447.59
8.2.140.0090.01247.39
8.2.130.0100.01048.30
8.2.120.0080.00850.36
8.2.110.0130.01348.05
8.2.100.0340.00346.47
8.2.90.0130.01346.59
8.2.80.0100.01446.97
8.2.70.0220.00446.38
8.2.60.0170.00746.79
8.2.50.0170.00746.38
8.2.40.0140.01049.30
8.2.30.0100.01448.13
8.2.20.0180.00746.16
8.2.10.0120.01246.61
8.2.00.0180.00446.55
8.1.280.0520.02478.19
8.1.270.0160.00351.90
8.1.260.0220.00650.75
8.1.250.0150.00649.31
8.1.240.0180.01149.58
8.1.230.0180.01849.72
8.1.220.0150.00946.40
8.1.210.0210.00347.68
8.1.200.0190.00646.10
8.1.190.0140.01045.85
8.1.180.0110.01446.10
8.1.170.0040.02947.38
8.1.160.0170.00749.53
8.1.150.0140.01047.61
8.1.140.0140.01048.20
8.1.130.0140.01046.42
8.1.120.0110.01146.23
8.1.110.0150.00946.09
8.1.100.0130.01046.20
8.1.90.0190.00446.24
8.1.80.0190.00446.22
8.1.70.0140.01446.23
8.1.60.0210.00446.43
8.1.50.0250.00646.36
8.1.40.0130.01346.40
8.1.30.0070.02046.37
8.1.20.0170.01046.18
8.1.10.0250.02279.46
8.1.00.0230.02679.49
8.0.300.0390.00682.05
8.0.290.0220.02278.81
8.0.280.0270.01480.27
8.0.270.0320.01379.24
8.0.260.0290.01379.07
8.0.250.0190.02378.94
8.0.240.0340.02078.77
8.0.230.0170.02478.74
8.0.220.0230.02078.75
8.0.210.0200.02078.74
8.0.200.0160.02678.87
8.0.190.0310.01778.62
8.0.180.0200.02778.79
8.0.170.0190.02978.69
8.0.160.0230.02378.75
8.0.150.0230.02378.76
8.0.140.0340.01378.57
8.0.130.0390.043133.68
8.0.120.0230.02678.74
8.0.110.0240.02078.73
8.0.100.0130.03078.59
8.0.90.0240.02478.68
8.0.80.0530.04078.66
8.0.70.0260.02078.61
8.0.60.0320.01678.73
8.0.50.0060.04278.64
8.0.30.0520.05278.92
8.0.20.0610.05878.81
8.0.10.0170.03178.75
8.0.00.0630.05478.61
7.4.330.0130.01678.51
7.4.320.0190.02378.40
7.4.300.0270.01478.46
7.4.290.0200.02778.50
7.4.280.0300.01778.34
7.4.270.0260.02078.38
7.4.260.0430.00778.34
7.4.250.0170.03478.37
7.4.240.0300.01778.26
7.4.230.0290.01678.48
7.4.220.0490.05678.30
7.4.210.0510.04478.27
7.4.200.0300.01678.29
7.4.160.0790.02878.22
7.4.150.0790.03778.59
7.4.140.0750.04178.36
7.4.130.0900.05878.62
7.4.120.0620.05478.39
7.4.110.0600.04678.38
7.4.100.0430.08678.46
7.4.90.0630.05078.30
7.4.80.1010.03678.47
7.4.70.0840.03978.30
7.4.60.0690.04978.45
7.4.50.0270.03078.52
7.4.40.0730.03778.31
7.4.30.0490.06078.37
7.4.00.0270.04077.01
7.3.330.0440.041133.73
7.3.320.0530.046133.68
7.3.310.0240.02478.26
7.3.300.0140.03178.18
7.3.290.0300.01778.20
7.3.280.0560.05378.16
7.3.270.0720.04278.14
7.3.260.0630.07678.46
7.3.240.0580.06878.33
7.3.230.0480.06278.09
7.3.210.1010.03778.41
7.3.200.0780.06978.30
7.3.190.0500.06278.33
7.3.180.0650.04678.09
7.3.170.0790.03978.19
7.3.160.0630.04378.21
7.2.330.0800.02978.51
7.2.320.0580.06478.58
7.2.310.0600.06078.39
7.2.300.0770.03578.36
7.2.290.0590.05678.57
7.2.60.1220.03478.27
7.2.00.0170.02081.14
7.1.200.1330.02477.61
7.1.101.5440.03379.33
7.1.70.1370.02779.07
7.1.60.0210.04979.27
7.1.50.0330.03678.82
7.1.00.0130.10084.45
7.0.200.3760.02376.67
7.0.60.1070.07781.85
7.0.50.0270.09779.71
7.0.40.0130.10322.11
7.0.30.0330.10721.93
7.0.20.0500.09022.02
7.0.10.0200.11021.89
7.0.00.0230.09722.18
5.6.210.0300.05783.48
5.6.200.0300.10381.05
5.6.190.0330.10083.27
5.6.180.0600.09783.39
5.6.170.0500.09783.23
5.6.160.0170.08383.23
5.6.150.0300.05381.00
5.6.140.0200.05781.07
5.6.130.0400.09781.10
5.6.120.0200.06383.91
5.6.110.0270.11383.89
5.6.100.0400.09783.93
5.6.90.0300.08384.02
5.6.80.0270.05383.43
5.5.350.0700.07782.20
5.5.340.0230.05379.79
5.5.330.0400.10382.13
5.5.320.0600.06382.02
5.5.310.0630.08782.02
5.5.300.0270.09379.81
5.5.290.0300.10779.89
5.5.280.0200.06382.77
5.5.270.0230.09082.73
5.5.260.0330.06782.80
5.5.250.0330.05382.52
5.5.240.0030.05781.99

preferences:
56.83 ms | 401 KiB | 5 Q