3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(substr((string)null, 0, 4));

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)
8.3.40.0060.00918.67
8.3.30.0080.00818.59
8.3.20.0080.00020.39
8.3.10.0080.00021.77
8.3.00.0000.00819.23
8.2.170.0120.00322.96
8.2.160.0030.01020.53
8.2.150.0040.00424.18
8.2.140.0090.00024.66
8.2.130.0050.00317.38
8.2.120.0070.00026.35
8.2.110.0060.00320.47
8.2.100.0070.00317.91
8.2.90.0040.00419.05
8.2.80.0000.00817.97
8.2.70.0090.00017.63
8.2.60.0040.00417.93
8.2.50.0000.00718.07
8.2.40.0060.00319.34
8.2.30.0000.00720.50
8.2.20.0030.00717.58
8.2.10.0050.00317.93
8.2.00.0090.00017.90
8.1.270.0060.00323.80
8.1.260.0040.00428.09
8.1.250.0000.00728.09
8.1.240.0090.00023.82
8.1.230.0080.00319.30
8.1.220.0030.00617.74
8.1.210.0080.00018.77
8.1.200.0000.00917.22
8.1.190.0000.01317.00
8.1.180.0000.00718.10
8.1.170.0000.00818.52
8.1.160.0040.00421.93
8.1.150.0070.00018.75
8.1.140.0080.00019.36
8.1.130.0040.00417.62
8.1.120.0040.00417.40
8.1.110.0000.00717.36
8.1.100.0040.00417.31
8.1.90.0000.00717.23
8.1.80.0080.00017.32
8.1.70.0030.00317.18
8.1.60.0070.00017.41
8.1.50.0040.00417.38
8.1.40.0040.00417.30
8.1.30.0030.00517.36
8.1.20.0080.00017.50
8.1.10.0000.00817.39
8.1.00.0000.00717.40
8.0.300.0070.00018.77
8.0.290.0040.00416.63
8.0.280.0070.00018.30
8.0.270.0040.00417.16
8.0.260.0000.00617.13
8.0.250.0030.00616.80
8.0.240.0060.00316.90
8.0.230.0090.00016.79
8.0.220.0030.00316.82
8.0.210.0040.00416.84
8.0.200.0040.00416.71
8.0.190.0030.00516.73
8.0.180.0050.00216.84
8.0.170.0060.00316.86
8.0.160.0000.00816.80
8.0.150.0030.00316.73
8.0.140.0030.00316.79
8.0.130.0060.00013.31
8.0.120.0040.00416.69
8.0.110.0040.00416.80
8.0.100.0050.00216.92
8.0.90.0070.00016.69
8.0.80.0140.00316.82
8.0.70.0070.00016.70
8.0.60.0080.00016.77
8.0.50.0000.00816.73
8.0.30.0080.01117.06
8.0.20.0130.00717.40
8.0.10.0050.00216.85
8.0.00.0090.01116.66
7.4.330.0000.00516.73
7.4.320.0000.00616.50
7.4.300.0000.00616.48
7.4.290.0070.00016.41
7.4.280.0090.00016.45
7.4.270.0030.00316.51
7.4.260.0000.00716.42
7.4.250.0050.00316.18
7.4.240.0040.00416.33
7.4.230.0070.00016.11
7.4.220.0030.01416.40
7.4.210.0110.00316.23
7.4.200.0070.00016.16
7.4.160.0080.01116.22
7.4.150.0090.00917.40
7.4.140.0120.00817.86
7.4.130.0040.01916.20
7.4.120.0050.01216.32
7.4.110.0060.01216.39
7.4.100.0090.00916.38
7.4.90.0070.01116.27
7.4.80.0030.01319.39
7.4.70.0030.01316.30
7.4.60.0070.01116.19
7.4.50.0090.00316.33
7.4.40.0090.00616.10
7.4.30.0090.00916.29
7.4.00.0080.00814.70
7.3.330.0000.00513.10
7.3.320.0000.00513.07
7.3.310.0000.00716.26
7.3.300.0000.00716.18
7.3.290.0060.00816.15
7.3.280.0140.00516.26
7.3.270.0080.00817.40
7.3.260.0070.01016.32
7.3.240.0080.01116.25
7.3.230.0150.00316.39
7.3.210.0160.00016.38
7.3.200.0040.01316.09
7.3.190.0050.01116.53
7.3.180.0090.00616.29
7.3.170.0030.01316.27
7.3.160.0160.00016.45
7.2.330.0120.00616.32
7.2.320.0130.00416.19
7.2.310.0090.00616.64
7.2.300.0070.01016.52
7.2.290.0110.01116.54
7.2.60.0070.00716.79
7.2.00.0000.01519.24
7.1.200.0030.01015.71
7.1.100.0060.00918.00
7.1.70.0000.01117.13
7.1.60.0060.01919.48
7.1.50.0040.01416.80
7.1.00.0070.07322.51
7.0.200.0030.00914.79
7.0.60.0070.07020.02
7.0.50.0070.08017.89
7.0.40.0070.06319.90
7.0.30.0200.04020.00
7.0.20.0270.04320.00
7.0.10.0170.08020.22
7.0.00.0170.06720.12
5.6.280.0100.04320.91
5.6.210.0030.04320.66
5.6.200.0030.05318.09
5.6.190.0030.09020.56
5.6.180.0230.03720.48
5.6.170.0230.06020.45
5.6.160.0230.07020.50
5.6.150.0030.05318.21
5.6.140.0000.08318.14
5.6.130.0030.04318.11
5.6.120.0130.08021.11
5.6.110.0070.09020.99
5.6.100.0100.07721.10
5.6.90.0030.04021.00
5.6.80.0100.07020.43
5.5.350.4370.03720.31
5.5.340.0100.07017.98
5.5.330.0070.08720.37
5.5.320.0030.08020.32
5.5.310.0130.04720.21
5.5.300.0070.03717.88
5.5.290.0100.07018.02
5.5.280.0130.07720.85
5.5.270.0070.07720.88
5.5.260.0100.04720.78
5.5.250.0100.03320.71
5.5.240.0200.04020.03

preferences:
47.12 ms | 400 KiB | 5 Q