3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ' '; var_dump(substr($a, 1));

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)
8.3.60.0110.01118.55
8.3.50.0100.00718.01
8.3.40.0140.00718.67
8.3.30.0140.00018.50
8.3.20.0070.00020.30
8.3.10.0080.00021.73
8.3.00.0080.00019.13
8.2.180.0000.01516.50
8.2.170.0150.00022.96
8.2.160.0040.01119.19
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0040.00422.25
8.2.120.0040.00426.35
8.2.110.0070.00320.35
8.2.100.0030.00717.78
8.2.90.0040.00419.05
8.2.80.0050.00317.97
8.2.70.0030.00517.63
8.2.60.0050.00317.80
8.2.50.0040.00418.10
8.2.40.0000.00920.46
8.2.30.0080.00019.11
8.2.20.0000.00817.59
8.2.10.0040.00417.98
8.2.00.0030.00617.90
8.1.280.0110.00725.92
8.1.270.0080.00023.92
8.1.260.0070.00028.09
8.1.250.0000.00828.09
8.1.240.0090.00023.77
8.1.230.0110.00021.05
8.1.220.0030.00517.74
8.1.210.0000.00818.77
8.1.200.0060.00317.13
8.1.190.0050.00317.23
8.1.180.0030.00518.10
8.1.170.0040.00418.53
8.1.160.0040.00423.83
8.1.150.0000.00718.85
8.1.140.0040.00419.50
8.1.130.0070.00017.67
8.1.120.0040.00417.41
8.1.110.0070.00017.32
8.1.100.0040.00417.44
8.1.90.0070.00017.32
8.1.80.0040.00417.40
8.1.70.0080.00017.44
8.1.60.0030.00617.57
8.1.50.0040.00417.50
8.1.40.0060.00317.52
8.1.30.0040.00417.49
8.1.20.0040.00417.55
8.1.10.0040.00417.32
8.1.00.0000.00717.42
8.0.300.0040.00418.77
8.0.290.0080.00016.63
8.0.280.0030.00318.29
8.0.270.0090.00017.18
8.0.260.0090.00017.24
8.0.250.0040.00416.89
8.0.240.0040.00416.96
8.0.230.0000.00716.77
8.0.220.0040.00416.76
8.0.210.0000.00816.85
8.0.200.0030.00316.76
8.0.190.0060.00616.75
8.0.180.0000.00716.89
8.0.170.0070.00016.91
8.0.160.0040.00416.96
8.0.150.0000.00716.76
8.0.140.0040.00416.79
8.0.130.0000.00513.27
8.0.120.0050.00216.77
8.0.110.0000.00816.71
8.0.100.0050.00316.84
8.0.90.0040.00416.87
8.0.80.0040.01116.77
8.0.70.0000.00716.63
8.0.60.0040.00416.77
8.0.50.0040.00416.83
8.0.30.0110.00516.82
8.0.20.0090.01117.40
8.0.10.0070.00016.95
8.0.00.0070.01516.65
7.4.330.0000.00415.08
7.4.320.0000.00716.34
7.4.300.0030.00316.57
7.4.290.0030.00616.43
7.4.280.0050.00216.57
7.4.270.0030.00316.58
7.4.260.0000.00916.32
7.4.250.0000.00716.51
7.4.240.0000.00716.37
7.4.230.0000.00816.52
7.4.220.0070.01716.47
7.4.210.0090.00616.38
7.4.200.0000.00716.36
7.4.160.0150.00016.44
7.4.150.0120.00617.40
7.4.140.0140.00917.86
7.4.130.0110.00616.36
7.4.120.0100.01016.38
7.4.110.0060.01516.50
7.4.100.0030.01316.41
7.4.90.0140.00716.43
7.4.80.0040.01419.39
7.4.70.0090.00916.29
7.4.60.0090.01516.38
7.4.50.0000.01216.43
7.4.40.0100.01316.45
7.4.30.0120.00316.29
7.4.00.0140.00314.91
7.3.330.0000.00512.89
7.3.320.0000.00612.98
7.3.310.0070.00016.23
7.3.300.0000.00716.18
7.3.290.0120.00616.12
7.3.280.0060.01216.18
7.3.270.0110.00817.40
7.3.260.0050.01216.09
7.3.250.0120.00416.06
7.3.240.0120.00616.23
7.3.230.0110.00516.39
7.3.210.0070.01416.18
7.3.200.0050.01116.35
7.3.190.0030.01315.97
7.3.180.0160.00016.20
7.3.170.0100.00716.32
7.3.160.0000.01716.53
7.2.330.0070.01016.53
7.2.320.0060.01116.30
7.2.310.0120.00816.27
7.2.300.0100.01316.40
7.2.290.0040.01316.13
7.2.60.0030.00916.78
7.2.50.0000.01116.71
7.2.00.0000.01418.87
7.1.200.0120.00315.51
7.1.70.0000.01017.09
7.1.60.0100.00019.79
7.1.50.0170.01734.44
7.1.00.0030.07722.33
7.0.200.0060.00916.66
7.0.80.0170.05720.00
7.0.70.0270.05020.02
7.0.60.0100.06719.99
7.0.50.0200.07320.33
7.0.40.0300.04720.29
7.0.30.0270.05320.35
7.0.20.0330.04720.39
7.0.10.0200.05720.30
7.0.00.0170.06720.34
5.6.280.0000.07721.11
5.6.230.0070.06320.71
5.6.220.0070.06320.55
5.6.210.0200.05020.57
5.6.200.0200.06721.11
5.6.190.0170.05321.07
5.6.180.0130.06021.13
5.6.170.0200.05021.00
5.6.160.0230.05021.13
5.6.150.0130.05721.13
5.6.140.0100.06021.09
5.6.130.0070.06321.16
5.6.120.0230.05021.05
5.6.110.0100.08721.12
5.6.100.0170.05721.07
5.6.90.0200.05721.04
5.6.80.0200.05020.46
5.6.70.0130.05320.43
5.6.60.0200.05320.54
5.6.50.0200.05320.42
5.6.40.0170.05320.41
5.6.30.0230.04720.41
5.6.20.0200.05020.44
5.6.10.0200.06320.43
5.6.00.0170.06320.36
5.5.370.0170.05020.38
5.5.360.0130.06020.44
5.5.350.0130.05720.40
5.5.340.0130.05320.89
5.5.330.0200.05020.67
5.5.320.0130.06320.92
5.5.310.0200.05020.85
5.5.300.0170.05720.91
5.5.290.0230.05020.77
5.5.280.0070.08720.82
5.5.270.0100.06320.82
5.5.260.0200.06020.82
5.5.250.0170.05320.76
5.5.240.0130.05320.17
5.5.230.0200.07020.14
5.5.220.0200.04720.25
5.5.210.0230.04720.32
5.5.200.0070.06320.22
5.5.190.0200.05320.14
5.5.180.0130.06320.18
5.5.160.0200.05020.29
5.5.150.0070.06020.28
5.5.140.0170.05320.29
5.5.130.0130.05320.04
5.5.120.0100.05720.27
5.5.110.0130.05320.11
5.5.100.0270.06019.98
5.5.90.0000.06720.06
5.5.80.0070.06320.08
5.5.70.0070.06020.14
5.5.60.0200.05020.21
5.5.50.0000.07020.14
5.5.40.0130.07720.10
5.5.30.0200.05020.07
5.5.20.0170.05320.11
5.5.10.0200.05720.09
5.5.00.0200.05320.08

preferences:
56.64 ms | 400 KiB | 5 Q