3v4l.org

run code in 300+ PHP versions simultaneously
<?php $idValue = null; var_dump(substr($idValue, 0, 1024));

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)
8.3.70.0170.00316.63
8.3.60.0060.00918.43
8.3.50.0130.00317.95
8.3.40.0110.00318.68
8.3.30.0090.00618.38
8.3.20.0080.00018.82
8.3.10.0040.00420.70
8.3.00.0040.00417.91
8.2.190.0140.00316.58
8.2.180.0070.00718.66
8.2.170.0150.00822.96
8.2.160.0030.01018.98
8.2.150.0080.00024.18
8.2.140.0000.00924.66
8.2.130.0080.00026.16
8.2.120.0100.00019.95
8.2.110.0000.00919.24
8.2.100.0000.01017.91
8.2.90.0000.00817.63
8.2.80.0090.00018.65
8.2.70.0000.00817.93
8.2.60.0080.00018.04
8.2.50.0080.00018.10
8.2.40.0040.00419.22
8.2.30.0040.00419.40
8.2.20.0070.00018.09
8.2.10.0030.00618.05
8.2.00.0030.00519.42
8.1.280.0140.00725.92
8.1.270.0000.00823.88
8.1.260.0060.00326.35
8.1.250.0040.00428.09
8.1.240.0060.00323.87
8.1.230.0070.00420.85
8.1.220.0000.00818.48
8.1.210.0040.00418.96
8.1.200.0000.00817.23
8.1.190.0060.00317.13
8.1.180.0050.00318.10
8.1.170.0000.00818.44
8.1.160.0000.00818.73
8.1.150.0040.00418.73
8.1.140.0000.00717.61
8.1.130.0030.00318.88
8.1.120.0070.00017.23
8.1.110.0000.00717.30
8.1.100.0050.00217.37
8.1.90.0070.00317.34
8.1.80.0030.00617.29
8.1.70.0030.00717.27
8.1.60.0090.00017.39
8.1.50.0000.00817.44
8.1.40.0040.00417.33
8.1.30.0000.00717.54
8.1.20.0000.00717.53
8.1.10.0080.00017.45
8.1.00.0000.00717.25
8.0.300.0050.00319.73
8.0.290.0040.00416.63
8.0.280.0030.00318.38
8.0.270.0070.00017.10
8.0.260.0060.00317.20
8.0.250.0000.00716.89
8.0.240.0030.00316.77
8.0.230.0040.00416.89
8.0.220.0000.00716.77
8.0.210.0000.00716.85
8.0.200.0030.00316.94
8.0.190.0060.00316.88
8.0.180.0000.00716.85
8.0.170.0040.00416.85
8.0.160.0000.00716.71
8.0.150.0040.00416.75
8.0.140.0050.00316.66
8.0.130.0000.00613.26
8.0.120.0000.00816.68
8.0.110.0070.00016.88
8.0.100.0040.00416.78
8.0.90.0030.00316.69
8.0.80.0100.00716.81
8.0.70.0000.00716.85
8.0.60.0000.00716.77
8.0.50.0040.00416.77
8.0.30.0060.01016.86
8.0.20.0070.01317.40
8.0.10.0000.00716.82
8.0.00.0090.01316.77
7.4.330.0000.00515.55
7.4.320.0060.00016.48
7.4.300.0000.00716.42
7.4.290.0070.00016.49
7.4.280.0060.00316.44
7.4.270.0030.00316.54
7.4.260.0000.00616.34
7.4.250.0000.00716.46
7.4.240.0040.00416.45
7.4.230.0050.00216.63
7.4.220.0080.00016.53
7.4.210.0020.01316.46
7.4.200.0000.00716.44
7.4.160.0110.00516.33
7.4.140.0140.00717.86
7.4.130.0040.01216.25
7.4.120.0100.00816.40
7.4.110.0100.00716.39
7.4.100.0130.00416.21
7.4.90.0090.00916.34
7.4.80.0060.01319.39
7.4.70.0090.00916.48
7.4.60.0030.01316.25
7.4.50.0100.00616.34
7.4.40.0100.00716.26
7.4.00.0140.00314.93
7.3.330.0050.00013.10
7.3.320.0060.00013.07
7.3.310.0080.00016.19
7.3.300.0000.00615.96
7.3.290.0040.00416.15
7.3.280.0100.00316.24
7.3.260.0090.01116.29
7.3.240.0090.00816.26
7.3.230.0110.00616.24
7.3.210.0090.00616.22
7.3.200.0130.00316.30
7.3.190.0150.00016.17
7.3.180.0100.00616.18
7.3.170.0090.00616.43
7.3.160.0150.00016.16
7.2.330.0180.00016.47
7.2.320.0060.01316.45
7.2.310.0060.01316.37
7.2.300.0120.00616.43
7.2.290.0100.01316.55
7.2.60.1080.00514.64
7.2.50.1570.00814.87
7.2.40.1800.00914.95
7.2.30.1080.00515.28
7.2.20.1340.01015.04
7.2.10.2330.01515.23
7.2.00.1700.01114.73
7.1.200.0100.00315.80
7.1.170.1380.00713.41
7.1.160.1170.01016.38
7.1.150.1340.01416.34
7.1.140.1140.01216.01
7.1.130.1210.01116.05
7.1.120.1110.00816.57
7.1.110.1300.01416.07
7.1.100.1360.01616.12
7.1.90.1560.01316.26
7.1.80.1380.00816.27
7.1.70.1430.01215.29
7.1.60.1750.01632.73
7.1.50.1700.01832.65
7.1.40.2080.01632.33
7.1.30.1920.01932.46
7.1.20.1940.01232.54
7.1.10.1400.00814.55
7.1.00.1650.01315.00

preferences:
20.29 ms | 401 KiB | 5 Q