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)
8.3.60.0480.03178.85
8.3.50.0830.02378.39
8.3.40.0410.00747.72
8.3.30.0510.00647.45
8.3.20.0170.01049.21
8.3.10.0200.00747.70
8.3.00.0080.01247.86
8.2.180.0790.02678.55
8.2.170.0360.01347.58
8.2.160.0200.02049.33
8.2.150.0210.00747.59
8.2.140.0140.00747.60
8.2.130.0130.00648.25
8.2.120.0070.00750.40
8.2.110.0230.01348.11
8.2.100.0280.00946.55
8.2.90.0170.00746.65
8.2.80.0150.00946.78
8.2.70.0130.01346.38
8.2.60.0120.01246.80
8.2.50.0170.00746.25
8.2.40.0200.00349.48
8.2.30.0130.01048.04
8.2.20.0110.01546.36
8.2.10.0070.01746.72
8.2.00.0160.00646.67
8.1.280.0530.02378.21
8.1.270.0100.01051.13
8.1.260.0190.00650.72
8.1.250.0110.01149.44
8.1.240.0190.01348.22
8.1.230.0220.01949.93
8.1.220.0170.00746.39
8.1.210.0170.00747.73
8.1.200.0180.00646.10
8.1.190.0120.01246.11
8.1.180.0070.01745.98
8.1.170.0230.01047.39
8.1.160.0170.00749.48
8.1.150.0140.01047.64
8.1.140.0200.00348.20
8.1.130.0140.01046.34
8.1.120.0190.00446.11
8.1.110.0100.01346.25
8.1.100.0190.00646.18
8.1.90.0160.00646.13
8.1.80.0150.00846.27
8.1.70.0250.00446.11
8.1.60.0140.01146.42
8.1.50.0130.02046.26
8.1.40.0130.01346.30
8.1.30.0160.01046.41
8.1.20.0200.00746.24
8.1.10.0210.02879.43
8.1.00.0170.03179.43
8.0.300.0320.01381.93
8.0.290.0230.02078.77
8.0.280.0210.02180.36
8.0.270.0230.02079.09
8.0.260.0190.02379.06
8.0.250.0140.02878.82
8.0.240.0350.01778.95
8.0.230.0260.01778.73
8.0.220.0170.02478.74
8.0.210.0260.01378.56
8.0.200.0240.01778.66
8.0.190.0330.01778.74
8.0.180.0330.01378.76
8.0.170.0230.02678.63
8.0.160.0270.02078.71
8.0.150.0310.01778.70
8.0.140.0310.01778.60
8.0.130.0400.043133.75
8.0.120.0330.01778.68
8.0.110.0270.01778.59
8.0.100.0130.03078.75
8.0.90.0230.02378.80
8.0.80.0490.04378.71
8.0.70.0170.03078.52
8.0.60.0330.01378.52
8.0.50.0330.01378.64
8.0.30.0510.04478.99
8.0.20.0690.04579.01
8.0.10.0180.02978.66
8.0.00.0640.05578.65
7.4.330.0160.01376.97
7.4.320.0250.01678.42
7.4.300.0240.01778.38
7.4.290.0230.02378.37
7.4.280.0260.02078.36
7.4.270.0260.01978.26
7.4.260.0320.02678.42
7.4.250.0200.03078.34
7.4.240.0270.02178.37
7.4.230.0270.02078.48
7.4.220.0630.07978.42
7.4.210.0410.05678.39
7.4.200.0290.01678.36
7.4.160.0520.05278.45
7.4.150.0600.05678.40
7.4.140.0700.04478.38
7.4.130.0900.05578.44
7.4.120.0570.05178.51
7.4.110.0600.04678.54
7.4.100.0940.05278.33
7.4.90.0440.06778.27
7.4.80.0780.07878.43
7.4.70.0720.04578.33
7.4.60.0610.05478.36
7.4.50.0470.01778.44
7.4.40.0890.02078.46
7.4.30.0600.05378.53
7.4.00.0300.03677.01
7.3.330.0500.033133.55
7.3.320.0560.043133.70
7.3.310.0290.01678.06
7.3.300.0300.01378.04
7.3.290.0290.01678.17
7.3.280.0550.04778.16
7.3.270.0670.05478.25
7.3.260.0570.05878.46
7.3.240.0620.05278.25
7.3.230.0610.05178.16
7.3.210.0750.04978.40
7.3.200.0560.05378.12
7.3.190.0690.04578.08
7.3.180.0510.06178.25
7.3.170.0640.05378.19
7.3.160.0630.05278.21
7.2.330.0800.05978.48
7.2.320.0740.06478.65
7.2.310.0890.02678.62
7.2.300.0900.02778.28
7.2.290.0660.04378.43
7.2.60.1100.03478.48
7.2.00.0100.03281.21
7.1.200.0910.02377.32
7.1.100.3720.02249.87
7.1.70.1390.01979.10
7.1.60.0230.05379.06
7.1.50.0350.02878.83
7.1.00.0100.10384.48
7.0.200.3520.03076.55
7.0.60.1170.11381.96
7.0.50.0270.06079.71
7.0.40.0270.09022.02
7.0.30.0330.08322.12
7.0.20.0330.09322.09
7.0.10.0270.06322.01
7.0.00.0130.08722.18
5.6.280.0170.05383.63
5.6.210.0470.09383.45
5.6.200.0200.08381.14
5.6.190.0300.09383.23
5.6.180.0700.09383.14
5.6.170.0670.09383.31
5.6.160.0230.06083.31
5.6.150.0070.08781.02
5.6.140.0330.10081.10
5.6.130.0330.10781.03
5.6.120.0300.12083.97
5.6.110.0370.10783.90
5.6.100.0270.09083.95
5.6.90.0300.11783.92
5.6.80.0330.11083.31
5.5.350.0370.06382.20
5.5.340.0100.07779.86
5.5.330.0130.08382.02
5.5.320.0700.08782.10
5.5.310.0600.08382.02
5.5.300.0330.10379.82
5.5.290.0370.10379.82
5.5.280.0170.11382.71
5.5.270.0330.10082.71
5.5.260.0370.10382.84
5.5.250.0370.09082.57
5.5.240.0270.10082.06

preferences:
31.57 ms | 401 KiB | 5 Q