3v4l.org

run code in 500+ PHP versions simultaneously
<?php $username = ''; $first_letter = $username[0] ?? '';

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)
8.5.30.0210.00818.47
8.5.20.0210.00818.09
8.5.10.0200.00917.73
8.5.00.0220.01018.26
8.4.180.0180.01121.75
8.4.170.0130.00821.78
8.4.160.0220.01121.75
8.4.150.0160.00617.74
8.4.140.0090.00817.52
8.4.130.0220.00917.71
8.4.120.0270.00719.12
8.4.110.0240.00718.26
8.4.100.0120.00817.72
8.4.90.0160.01017.75
8.4.80.0190.00917.59
8.4.70.0220.00817.92
8.4.60.0240.01017.90
8.4.50.0270.00617.66
8.4.40.0220.00617.51
8.4.30.0260.00518.55
8.4.20.0250.00618.13
8.4.10.0260.00518.26
8.3.300.0220.00719.55
8.3.290.0210.01019.49
8.3.280.0220.01018.12
8.3.270.0220.00716.60
8.3.260.0210.00616.44
8.3.250.0220.00717.76
8.3.240.0210.01016.45
8.3.230.0260.00616.59
8.3.220.0160.00616.73
8.3.210.0110.00516.44
8.3.200.0130.00417.08
8.3.190.0170.00716.66
8.3.180.0180.00516.43
8.3.170.0190.00416.49
8.3.160.0210.00316.54
8.3.150.0170.00516.65
8.3.140.0100.00816.68
8.3.130.0180.00716.54
8.3.120.0210.00517.03
8.3.110.0210.00617.71
8.3.100.0210.00717.93
8.3.90.0220.00417.85
8.3.80.0210.00618.05
8.3.70.0240.00617.99
8.3.60.0260.00518.35
8.3.50.0190.00618.68
8.3.40.0240.00619.07
8.3.30.0210.00519.09
8.3.20.0190.00520.04
8.3.10.0190.00420.24
8.3.00.0160.00320.60
8.2.300.0230.01017.93
8.2.290.0240.00516.63
8.2.280.0210.00717.17
8.2.270.0180.00716.57
8.2.260.0210.00417.54
8.2.250.0200.00816.43
8.2.240.0190.00617.20
8.2.230.0190.00617.96
8.2.220.0180.00519.61
8.2.210.0190.00619.95
8.2.200.0170.00818.01
8.2.190.0190.00618.32
8.2.180.0230.00619.87
8.2.170.0200.00619.22
8.2.160.0190.00819.98
8.2.150.0190.00620.47
8.2.140.0180.00720.23
8.2.130.0200.00520.59
8.2.120.0180.00519.48
8.2.110.0160.00820.48
8.2.100.0180.00718.84
8.2.90.0190.00619.00
8.2.80.0190.00419.01
8.2.70.0170.00433.71
8.2.60.0180.00718.50
8.2.50.0180.00618.60
8.2.40.0180.00418.94
8.2.30.0130.00618.44
8.2.20.0160.00618.77
8.2.10.0140.00518.41
8.2.00.0140.00518.65
8.1.340.0160.00718.69
8.1.330.0220.00616.20
8.1.320.0170.00715.91
8.1.310.0190.00916.24
8.1.300.0210.00516.94
8.1.290.0200.00520.58
8.1.280.0210.00519.65
8.1.270.0190.00519.96
8.1.260.0180.00620.44
8.1.250.0170.00620.81
8.1.240.0200.00519.64
8.1.230.0190.00719.71
8.1.220.0190.00518.77
8.1.210.0160.00618.92
8.1.200.0130.00718.31
8.1.190.0150.00718.27
8.1.180.0150.00718.36
8.1.170.0160.00718.62
8.1.160.0180.00418.55
8.1.150.0180.00418.33
8.1.140.0150.00718.28
8.1.130.0130.00517.91
8.1.120.0130.00517.96
8.1.110.0130.00517.86
8.1.100.0120.00417.84
8.1.90.0100.00517.70
8.1.80.0120.00417.81
8.1.70.0110.00517.77
8.1.60.0110.00717.95
8.1.50.0140.00617.85
8.1.40.0130.00517.92
8.1.30.0120.00517.97
8.1.20.0130.00518.00
8.1.10.0120.00417.86
8.1.00.0120.00517.75
8.0.300.0170.00618.72
8.0.290.0180.00718.01
8.0.280.0170.00618.08
8.0.270.0160.00617.63
8.0.260.0140.00317.34
8.0.250.0120.00417.37
8.0.240.0120.00517.36
8.0.230.0110.00617.31
8.0.220.0130.00317.24
8.0.210.0110.00517.23
8.0.200.0100.00617.28
8.0.190.0110.00517.21
8.0.180.0120.00417.19
8.0.170.0120.00517.34
8.0.160.0110.00617.22
8.0.150.0110.00617.18
8.0.140.0110.00617.19
8.0.130.0130.00517.19
8.0.120.0120.00517.17
8.0.110.0130.00417.18
8.0.100.0120.00417.18
8.0.90.0120.00417.16
8.0.80.0120.00417.19
8.0.70.0100.00617.16
8.0.60.0110.00517.11
8.0.50.0110.00517.19
8.0.30.0100.00717.16
8.0.20.0130.00417.22
8.0.10.0120.00517.30
7.4.330.0090.00416.78
7.4.320.0140.00417.13
7.4.300.0120.00516.99
7.4.290.0150.00516.96
7.4.280.0140.00516.97
7.4.270.0140.00517.01
7.4.260.0150.00416.99
7.4.250.0130.00516.94
7.4.240.0130.00416.99
7.4.230.0120.00316.99
7.4.220.0110.00416.99
7.4.210.0110.00516.99
7.4.200.0120.00416.98
7.4.190.0120.00317.02
7.4.180.0120.00417.00
7.4.160.0130.00417.01
7.4.150.0130.00416.94
7.4.140.0130.00416.93
7.4.130.0140.00416.89
7.4.120.0130.00516.88
7.4.110.0130.00516.93
7.4.100.0130.00517.10
7.4.90.0130.00316.91
7.4.80.0130.00416.87
7.4.70.0140.00416.81
7.4.60.0120.00516.87
7.4.50.0130.00416.91
7.4.40.0120.00516.87
7.4.30.0120.00416.94
7.4.20.0130.00516.96
7.4.10.0120.00516.94
7.4.00.0110.00516.96

preferences:
63.22 ms | 1226 KiB | 5 Q