3v4l.org

run code in 500+ PHP versions simultaneously
<?php class A{ public function c(?string $a = null) {} } class B extends A{ public function c(string $a = null) {} }

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)
8.5.30.0420.01016.58
8.5.20.0320.00716.56
8.5.10.0170.00416.57
8.5.00.0250.01216.49
8.4.180.0240.01019.44
8.4.170.0240.00619.66
8.4.160.0170.00319.20
8.4.150.0160.00619.29
8.4.140.0170.00717.22
8.4.130.0240.00717.39
8.4.120.0190.00417.75
8.4.110.0260.00517.57
8.4.100.0250.00817.66
8.4.90.0300.00817.49
8.4.80.0260.00717.60
8.4.70.0280.00317.54
8.4.60.0220.00417.70
8.4.50.0380.00717.16
8.4.40.0300.00917.31
8.4.30.0190.00617.59
8.4.20.0220.00217.41
8.4.10.0170.00517.45
8.3.300.0210.00417.99
8.3.290.0150.00317.96
8.3.280.0120.00718.15
8.3.270.0220.00616.49
8.3.260.0260.00416.49
8.3.250.0240.00616.49
8.3.240.0330.00716.49
8.3.230.0180.00216.49
8.3.220.0160.00516.49
8.3.210.0180.00316.49
8.3.200.0190.00316.49
8.3.190.0180.00416.49
8.3.180.0190.00316.49
8.3.170.0160.00816.51
8.3.160.0180.00316.49
8.3.150.0180.00216.52
8.3.140.0160.00416.49
8.3.130.0160.00416.49
8.3.120.0150.00516.49
8.3.110.0170.00416.49
8.3.100.0190.00316.49
8.3.90.0150.00616.49
8.3.80.0190.00416.57
8.3.70.0180.00216.49
8.3.60.0160.00516.49
8.3.50.0170.00616.49
8.3.40.0230.00517.42
8.3.30.0240.00317.73
8.3.20.0130.00317.82
8.3.10.0300.00517.72
8.3.00.0240.00817.72
8.2.300.0270.01317.69
8.2.290.0280.00816.49
8.2.280.0280.00716.49
8.2.270.0290.00416.49
8.2.260.0300.00816.49
8.2.250.0290.00916.49
8.2.240.0280.00816.51
8.2.230.0310.00716.49
8.2.220.0310.00716.54
8.2.210.0260.01116.49
8.2.200.0290.00816.49
8.2.190.0280.00916.49
8.2.180.0280.00916.49
8.2.170.0270.00417.84
8.2.160.0270.01117.87
8.2.150.0280.00817.83
8.2.140.0290.00717.70
8.2.130.0340.00417.70
8.2.120.0290.00817.70
8.2.110.0270.00617.84
8.2.100.0230.00517.85
8.2.90.0170.00217.84
8.2.80.0290.00517.54
8.2.70.0280.00717.71
8.2.60.0300.00617.59
8.2.50.0320.00517.57
8.2.40.0260.00817.73
8.2.30.0290.00617.72
8.2.20.0300.00617.59
8.2.10.0330.00517.72
8.2.00.0220.00717.73
8.1.340.0300.00317.26
8.1.330.0260.00716.49
8.1.320.0210.00316.49
8.1.310.0140.00316.49
8.1.300.0190.00416.49
8.1.290.0230.00716.49
8.1.280.0240.01216.49
8.1.270.0270.00917.41
8.1.260.0300.00617.53
8.1.250.0260.01117.60
8.1.240.0300.00617.33
8.1.230.0290.00517.48
8.1.220.0260.00917.61
8.1.210.0280.00617.41
8.1.200.0250.01017.48
8.1.190.0300.00717.41
8.1.180.0240.01017.41
8.1.170.0280.00717.41
8.1.160.0260.00817.41
8.1.150.0240.00817.49
8.1.140.0240.00717.39
8.1.130.0270.00517.60
8.1.120.0290.00717.69
8.1.110.0260.00917.63
8.1.100.0240.01117.43
8.1.90.0240.00817.43
8.1.80.0220.01217.42
8.1.70.0330.00617.57
8.1.60.0220.00917.77
8.1.50.0260.00917.50
8.1.40.0250.01117.72
8.1.30.0390.00617.57
8.1.20.0230.01217.80
8.1.10.0220.01017.64
8.1.00.0200.00817.45
8.0.300.0200.00816.94
8.0.290.0260.00716.99
8.0.280.0260.00416.98
8.0.270.0100.00616.97
8.0.260.0150.00216.82
8.0.250.0110.00417.04
8.0.240.0170.00416.81
8.0.230.0210.00916.59
8.0.220.0260.00616.89
8.0.210.0250.00816.96
8.0.200.0230.00517.02
8.0.190.0230.00816.82
8.0.180.0280.00517.05
8.0.170.0220.00617.03
8.0.160.0270.00617.02
8.0.150.0210.00616.90
8.0.140.0230.00716.70
8.0.130.0140.00516.98
8.0.120.0250.00716.73
8.0.110.0250.00816.81
8.0.100.0340.00816.70
8.0.90.0230.00416.80
8.0.80.0150.00816.81
8.0.70.0290.00516.85
8.0.60.0240.00916.77
8.0.50.0260.01116.74
8.0.30.0270.00916.54
8.0.20.0240.00816.84
8.0.10.0200.00917.15
8.0.00.0230.00917.16
7.4.330.0230.01016.57
7.4.320.0260.00716.53
7.4.300.0230.00916.66
7.4.290.0300.00616.65
7.4.280.0260.00616.52
7.4.270.0270.00516.52
7.4.260.0220.00716.60
7.4.250.0260.00816.49
7.4.240.0250.00916.49
7.4.230.0220.00416.49
7.4.220.0250.00716.49
7.4.210.0190.00516.63
7.4.200.0110.00316.49
7.4.190.0130.00416.64
7.4.180.0200.00716.49
7.4.160.0240.00816.49
7.4.150.0280.00516.51
7.4.140.0270.00416.49
7.4.130.0260.00616.49
7.4.120.0180.01316.49
7.4.110.0250.00816.52
7.4.100.0260.00616.49
7.4.90.0230.00816.49
7.4.80.0270.00716.49
7.4.70.0250.00716.49
7.4.60.0240.00816.49
7.4.50.0280.00616.49
7.4.40.0290.00616.49
7.4.30.0240.00816.49
7.4.20.0270.00616.49
7.4.10.0210.00716.49
7.4.00.0230.00316.49
7.3.330.0180.00216.49
7.3.320.0130.00116.49
7.3.310.0280.00316.49
7.3.300.0260.00716.49
7.3.290.0290.00716.49
7.3.280.0210.00816.49
7.3.270.0180.00316.49
7.3.260.0190.01216.49
7.3.250.0300.00416.49
7.3.240.0210.01016.49
7.3.230.0260.00416.49
7.3.220.0250.00516.49
7.3.210.0270.00416.49
7.3.200.0220.00916.49
7.3.190.0240.00716.49
7.3.180.0220.00916.49
7.3.170.0280.00316.49
7.3.160.0220.00816.49
7.3.150.0230.00716.49
7.3.140.0270.00416.49
7.3.130.0240.00616.49
7.3.120.0250.00516.49
7.3.110.0200.00516.49
7.3.100.0240.00716.49
7.3.90.0280.00316.49
7.3.80.0240.00716.49
7.3.70.0200.00916.49
7.3.60.0280.00316.61
7.3.50.0210.00516.55
7.3.40.0260.00416.49
7.3.30.0250.00616.55
7.3.20.0260.00618.36
7.3.10.0200.00618.26
7.3.00.0240.00618.26
7.2.340.0220.00816.49
7.2.330.0290.00416.49
7.2.320.0260.00416.49
7.2.310.0220.00816.49
7.2.300.0200.00816.49
7.2.290.0230.00616.49
7.2.280.0260.00616.49
7.2.270.0270.00516.49
7.2.260.0270.00416.49
7.2.250.0240.00716.49
7.2.240.0270.00716.49
7.2.230.0230.00816.49
7.2.220.0240.00916.49
7.2.210.0310.00816.49
7.2.200.0240.00716.59
7.2.190.0250.00616.59
7.2.180.0220.00916.49
7.2.170.0250.00816.53
7.2.160.0240.00716.59
7.2.150.0220.00618.33
7.2.140.0190.00618.34
7.2.130.0140.00518.49
7.2.120.0120.00218.53
7.2.110.0200.00618.25
7.2.100.0240.00718.30
7.2.90.0250.00918.07
7.2.80.0260.00618.33
7.2.70.0240.00918.33
7.2.60.0230.00918.34
7.2.50.0280.00518.42
7.2.40.0250.00618.33
7.2.30.0250.00818.32
7.2.20.0300.00718.28
7.2.10.0220.00718.46
7.2.00.0190.00918.28
7.1.330.0240.01017.09
7.1.320.0290.00717.40
7.1.310.0180.00117.11
7.1.300.0110.00317.26
7.1.290.0140.00217.39
7.1.280.0140.00217.43
7.1.270.0220.00717.30
7.1.260.0230.00517.25
7.1.250.0200.00917.12
7.1.240.0210.00717.19
7.1.230.0260.00617.32
7.1.220.0220.00717.39
7.1.210.0270.00617.32
7.1.200.0240.00417.32
7.1.190.0210.00817.29
7.1.180.0250.00917.12
7.1.170.0220.00617.33
7.1.160.0230.00617.21
7.1.150.0300.00917.16
7.1.140.0250.00817.28
7.1.130.0270.00317.33
7.1.120.0200.00417.26
7.1.110.0200.00417.06
7.1.100.0280.00417.21
7.1.90.0220.00717.17
7.1.80.0240.00717.13
7.1.70.0220.00616.98
7.1.60.0230.00917.25
7.1.50.0210.00717.14
7.1.40.0260.00317.38
7.1.30.0270.00517.21
7.1.20.0220.00617.03
7.1.10.0230.00617.09
7.1.00.0250.00817.02
7.0.330.0230.00617.04
7.0.320.0250.00517.18
7.0.310.0210.00816.99
7.0.300.0250.00317.05
7.0.290.0240.00716.87
7.0.280.0240.00416.96
7.0.270.0190.00916.96
7.0.260.0270.00916.79
7.0.250.0260.00616.96
7.0.240.0220.00817.06
7.0.230.0190.00317.14
7.0.220.0140.00417.16
7.0.210.0100.00317.11
7.0.200.0230.00616.95
7.0.190.0160.01217.17
7.0.180.0240.00717.23
7.0.170.0240.00317.26
7.0.160.0200.00616.89
7.0.150.0250.00616.83
7.0.140.0230.00717.07
7.0.130.0260.00317.23
7.0.120.0230.00916.85
7.0.110.0300.00616.75
7.0.100.0210.00717.09
7.0.90.0250.00617.01
7.0.80.0280.00716.72
7.0.70.0240.00816.89
7.0.60.0230.00616.96
7.0.50.0150.00816.68
7.0.40.0190.00516.75
7.0.30.0240.00616.96
7.0.20.0160.00516.75
7.0.10.0220.00817.02
7.0.00.0200.00416.73
5.6.400.0150.00816.49
5.6.390.0230.00616.49
5.6.380.0220.00816.49
5.6.370.0260.00316.49
5.6.360.0250.00616.49
5.6.350.0210.00916.49
5.6.340.0250.00416.49
5.6.330.0230.00716.49
5.6.320.0260.00416.49
5.6.310.0210.00816.49
5.6.300.0240.00516.49
5.6.290.0230.00716.49
5.6.280.0220.00916.49
5.6.270.0230.00616.49
5.6.260.0270.00316.49
5.6.250.0270.00616.49
5.6.240.0280.00416.49
5.6.230.0210.00816.49
5.6.220.0250.00716.49
5.6.210.0190.00516.49
5.6.200.0260.00516.49
5.6.190.0260.00516.49
5.6.180.0260.00416.49
5.6.170.0260.00416.49
5.6.160.0200.01016.49
5.6.150.0220.00816.49
5.6.140.0240.00516.49
5.6.130.0220.00916.49
5.6.120.0210.00916.49
5.6.110.0210.00916.49
5.6.100.0270.00816.49
5.6.90.0280.00316.49
5.6.80.0250.00416.49
5.6.70.0270.00316.49
5.6.60.0210.00716.49
5.6.50.0260.00516.49
5.6.40.0190.00816.49
5.6.30.0160.00816.49
5.6.20.0200.00916.49
5.6.10.0220.00616.49
5.6.00.0220.00616.49
5.5.380.0230.00616.49
5.5.370.0220.00716.49
5.5.360.0240.00516.49
5.5.350.0190.01016.49
5.5.340.0240.00516.49
5.5.330.0230.00716.49
5.5.320.0240.00516.49
5.5.310.0200.00716.49
5.5.300.0210.00616.49
5.5.290.0230.00616.49
5.5.280.0200.00816.49
5.5.270.0220.00816.49
5.5.260.0240.00516.49
5.5.250.0200.01016.49
5.5.240.0240.00416.49
5.5.230.0220.00616.49
5.5.220.0230.00616.49
5.5.210.0190.00516.49
5.5.200.0190.00416.49
5.5.190.0200.00316.49
5.5.180.0270.00416.49
5.5.170.0290.00616.49
5.5.160.0200.00616.49
5.5.150.0240.00216.49
5.5.140.0220.00516.49
5.5.130.0250.00316.49
5.5.120.0230.00616.49
5.5.110.0220.00716.49
5.5.100.0200.00616.49
5.5.90.0190.00316.49
5.5.80.0160.00316.49
5.5.70.0120.00716.49
5.5.60.0150.00916.49
5.5.50.0210.00616.49
5.5.40.0230.00616.49
5.5.30.0200.00816.49
5.5.20.0190.00616.49
5.5.10.0170.00516.49
5.5.00.0240.00416.49
5.4.450.0190.00516.49
5.4.440.0170.00916.49
5.4.430.0180.00516.49
5.4.420.0200.00316.49
5.4.410.0190.00316.49
5.4.400.0180.00516.49
5.4.390.0180.00516.49
5.4.380.0170.00516.49
5.4.370.0170.00516.49
5.4.360.0180.00416.49
5.4.350.0180.00416.49
5.4.340.0170.00616.49
5.4.330.0160.00716.49
5.4.320.0200.00316.49
5.4.310.0180.00516.49
5.4.300.0180.00416.49
5.4.290.0200.00316.49
5.4.280.0160.00716.49
5.4.270.0180.00416.49
5.4.260.0200.00316.49
5.4.250.0200.00416.49
5.4.240.0150.00816.49
5.4.230.0150.00716.49
5.4.220.0130.00516.49
5.4.210.0150.00316.49
5.4.200.0120.00616.49
5.4.190.0150.00816.49
5.4.180.0180.00416.49
5.4.170.0210.00416.49
5.4.160.0180.00616.49
5.4.150.0170.00616.49
5.4.140.0210.00116.49
5.4.130.0170.00516.49
5.4.120.0170.00416.49
5.4.110.0210.00116.49
5.4.100.0180.00616.49
5.4.90.0170.00516.49
5.4.80.0150.00716.49
5.4.70.0160.00616.49
5.4.60.0220.00316.49
5.4.50.0170.00716.49
5.4.40.0190.00316.49
5.4.30.0170.00516.49
5.4.20.0150.00616.49
5.4.10.0230.00116.49
5.4.00.0170.00616.49
5.3.290.0180.00516.49
5.3.280.0180.00516.49
5.3.270.0190.00516.49
5.3.260.0170.00616.49
5.3.250.0170.00616.49
5.3.240.0160.00616.49
5.3.230.0150.00416.49
5.3.220.0140.00516.49
5.3.210.0140.00416.49
5.3.200.0160.00716.49
5.3.190.0190.00316.49
5.3.180.0220.00416.49
5.3.170.0200.00516.49
5.3.160.0200.00316.49
5.3.150.0210.00316.49
5.3.140.0170.00716.49
5.3.130.0160.00616.49
5.3.120.0070.00316.49
5.3.110.0060.00416.49
5.3.100.0070.00316.49
5.3.90.0080.00216.49
5.3.80.0060.00416.49
5.3.70.0090.00116.49
5.3.60.0120.00716.49
5.3.50.0170.00116.49
5.3.40.0160.00616.49
5.3.30.0190.00416.49
5.3.20.0180.00416.49
5.3.10.0160.00616.49
5.3.00.0160.00616.49
5.2.170.0130.00516.49
5.2.160.0130.00416.49
5.2.150.0160.00416.49
5.2.140.0130.00516.49
5.2.130.0150.00616.49
5.2.120.0150.00316.49
5.2.110.0120.00616.49
5.2.100.0130.00616.49
5.2.90.0150.00416.49
5.2.80.0130.00516.49
5.2.70.0110.00316.49
5.2.60.0120.00216.49
5.2.50.0120.00616.49
5.2.40.0140.00516.49
5.2.30.0130.00616.49
5.2.20.0130.00516.49
5.2.10.0160.00516.49
5.2.00.0120.00516.49
5.1.60.0140.00316.49
5.1.50.0090.00816.49
5.1.40.0130.00316.49
5.1.30.0160.00216.49
5.1.20.0110.00216.49
5.1.10.0090.00416.49
5.1.00.0100.00516.49
5.0.50.0090.00516.49
5.0.40.0110.00316.49
5.0.30.0110.00316.49
5.0.20.0120.00216.49
5.0.10.0100.00416.49
5.0.00.0090.00516.49
4.4.90.0070.00316.49
4.4.80.0050.00416.49
4.4.70.0060.00416.49
4.4.60.0090.00116.49
4.4.50.0070.00316.49
4.4.40.0060.00316.49
4.4.30.0050.00516.49
4.4.20.0060.00416.49
4.4.10.0070.00216.49
4.4.00.0060.00316.49
4.3.110.0060.00216.49
4.3.100.0080.00216.49
4.3.90.0050.00416.49
4.3.80.0060.00216.49
4.3.70.0070.00216.49
4.3.60.0070.00216.49
4.3.50.0070.00316.49
4.3.40.0070.00216.49
4.3.30.0030.00416.49
4.3.20.0060.00216.49
4.3.10.0050.00216.49
4.3.00.0050.00316.49

preferences:
55.94 ms | 2683 KiB | 5 Q