3v4l.org

run code in 300+ PHP versions simultaneously
<?php Class A {} $a = new A; $b = $a; // Passed by identifier $a = null; var_dump($b); $a2 = new A; $b2 = &$a; // Passed by reference $a2 = null; var_dump($b2);

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)
8.3.120.0030.00518.74
8.3.110.0090.00020.94
8.3.100.0060.00316.50
8.3.90.0040.00426.77
8.3.80.0030.00616.38
8.3.70.0100.00318.18
8.3.60.0070.01017.96
8.3.50.0080.01023.52
8.3.40.0040.01118.64
8.3.30.0070.00718.61
8.3.20.0000.00724.18
8.3.10.0040.00424.66
8.3.00.0080.00026.16
8.2.240.0100.00019.05
8.2.230.0100.00022.58
8.2.220.0030.00724.06
8.2.210.0070.00726.77
8.2.200.0060.00316.63
8.2.190.0100.01616.75
8.2.180.0160.00025.92
8.2.170.0070.00718.71
8.2.160.0170.00022.96
8.2.150.0090.00025.66
8.2.140.0050.00324.66
8.2.130.0000.00826.16
8.2.120.0040.00419.83
8.2.110.0040.00419.31
8.2.100.0040.00717.84
8.2.90.0040.00417.50
8.2.80.0000.00818.56
8.2.70.0090.00017.63
8.2.60.0000.00817.50
8.2.50.0000.00917.55
8.2.40.0040.00418.16
8.2.30.0040.00417.82
8.2.20.0040.00418.00
8.2.10.0050.00219.24
8.2.00.0000.00719.29
8.1.300.0040.00416.10
8.1.290.0080.00030.84
8.1.280.0220.00025.92
8.1.270.0030.00523.99
8.1.260.0050.00328.09
8.1.250.0040.00428.09
8.1.240.0080.00323.63
8.1.230.0080.00320.95
8.1.220.0000.00818.53
8.1.210.0040.00418.77
8.1.200.0050.00317.35
8.1.190.0050.00217.40
8.1.180.0090.00018.10
8.1.170.0040.00418.55
8.1.160.0040.00418.73
8.1.150.0000.00718.79
8.1.140.0000.00718.73
8.1.130.0040.00417.45
8.1.120.0000.00717.31
8.1.110.0040.00417.34
8.1.100.0040.00417.29
8.1.90.0040.00417.40
8.1.80.0060.00317.41
8.1.70.0040.00817.35
8.1.60.0050.00517.48
8.1.50.0070.00417.37
8.1.40.0100.00217.35
8.1.30.0090.00417.60
8.1.20.0050.00717.60
8.1.10.0100.00517.53
8.1.00.0080.00417.37
8.0.300.0000.00719.90
8.0.290.0050.00316.75
8.0.280.0030.00318.29
8.0.270.0000.00717.93
8.0.260.0000.00616.75
8.0.250.0000.00716.87
8.0.240.0060.00016.78
8.0.230.0070.00016.77
8.0.220.0000.00716.88
8.0.210.0040.00716.75
8.0.200.0060.00316.85
8.0.190.0070.00216.78
8.0.180.0040.00716.75
8.0.170.0040.00716.74
8.0.160.0060.00616.76
8.0.150.0080.00316.81
8.0.140.0060.00516.77
8.0.130.0020.00814.99
8.0.120.0040.00816.74
8.0.110.0050.00716.74
8.0.100.0110.00016.70
8.0.90.0070.00416.85
8.0.80.0100.00716.75
8.0.70.0020.00916.74
8.0.60.0070.00316.78
8.0.50.0050.00616.79
8.0.30.0090.00616.77
8.0.20.0140.00516.95
8.0.10.0110.00716.87
8.0.00.0110.00717.24
7.4.330.0050.00015.55
7.4.320.0000.00716.47
7.4.300.0050.00616.53
7.4.290.0060.00516.36
7.4.280.0060.00616.36
7.4.270.0060.00616.48
7.4.260.0080.00314.75
7.4.250.0080.00316.42
7.4.240.0080.00316.43
7.4.230.0070.00416.36
7.4.220.0070.00216.40
7.4.210.0080.00716.46
7.4.200.0030.00616.49
7.4.190.0100.00316.57
7.4.180.0070.00716.39
7.4.160.0040.01016.42
7.4.150.0100.00716.35
7.4.140.0080.00816.88
7.4.130.0130.00416.85
7.4.120.0130.00316.88
7.4.110.0080.00916.83
7.4.100.0140.00516.94
7.4.90.0090.00816.90
7.4.80.0100.00716.87
7.4.70.0090.00816.79
7.4.60.0140.00316.83
7.4.50.0110.01416.71
7.4.40.0080.00816.84
7.4.30.0110.00716.85
7.4.20.0140.00116.80
7.4.10.0110.00416.83
7.4.00.0070.01016.87
7.3.330.0060.00516.10
7.3.320.0070.00314.60
7.3.310.0060.00516.11
7.3.300.0090.00216.21
7.3.290.0130.00516.19
7.3.280.0120.00316.12
7.3.270.0090.00816.24
7.3.260.0090.00716.78
7.3.250.0100.00916.73
7.3.240.0110.00716.71
7.3.230.0110.00616.77
7.3.220.0120.00616.69
7.3.210.0100.00916.73
7.3.200.0110.00516.74
7.3.190.0090.01016.68
7.3.180.0120.00616.72
7.3.170.0100.00516.74
7.3.160.0110.00616.72
7.3.150.0070.01016.71
7.3.140.0110.00516.75
7.3.130.0040.01116.66
7.3.120.0070.01016.74
7.3.110.0120.00616.67
7.3.100.0090.00816.69
7.3.90.0100.00616.93
7.3.80.0070.01016.73
7.3.70.0110.00416.76
7.3.60.0120.00216.80
7.3.50.0110.00416.84
7.3.40.0070.00816.86
7.3.30.0070.00816.87
7.3.20.0080.00917.48
7.3.10.0100.00817.41
7.3.00.0200.00517.46

preferences:
28.6 ms | 403 KiB | 5 Q