3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( mb_convert_encoding( mb_substr( mb_convert_encoding( "¨l", "ISO-8859-1", "UTF-8" ), 0, null, "UTF-8" ), "UTF-8", "ISO-8859-1" ) );

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)
8.5.00.0120.00919.86
8.4.150.0020.00114.05
8.4.140.0110.01117.60
8.4.130.0130.00717.82
8.4.120.0150.00520.34
8.4.110.0060.00722.46
8.4.100.0100.01017.33
8.4.90.0150.00718.29
8.4.80.0110.00917.50
8.4.70.0160.00517.50
8.4.60.0120.00718.75
8.4.50.0070.00517.62
8.4.40.0160.00317.33
8.4.30.0160.00320.78
8.4.20.0100.01019.86
8.4.10.0060.00319.37
8.3.280.0120.00920.61
8.3.270.0110.00816.62
8.3.260.0110.00916.19
8.3.250.0120.00618.89
8.3.240.0140.00616.59
8.3.230.0080.00316.68
8.3.220.0070.00816.99
8.3.210.0060.00216.43
8.3.200.0030.00516.50
8.3.190.0080.01016.82
8.3.180.0100.00916.25
8.3.170.0140.00417.20
8.3.160.0090.00618.53
8.3.150.0110.00716.43
8.3.140.0110.00716.43
8.3.130.0130.00716.29
8.3.120.0040.00718.91
8.3.110.0210.01116.37
8.3.100.0170.00717.13
8.3.90.0230.00216.98
8.3.80.0250.01016.31
8.3.70.0230.00616.19
8.3.60.0200.00416.19
8.3.50.0150.00416.48
8.3.40.0090.00617.19
8.3.30.0090.00617.18
8.3.20.0120.00317.19
8.3.10.0160.00017.25
8.3.00.0160.00217.19
8.2.290.0110.00720.34
8.2.280.0040.00418.95
8.2.270.0070.01116.62
8.2.260.0040.01116.50
8.2.250.0040.00418.49
8.2.240.0100.00619.09
8.2.230.0130.00616.34
8.2.220.0170.00316.58
8.2.210.0190.00016.59
8.2.200.0260.00916.55
8.2.190.0250.00316.60
8.2.180.0190.00516.45
8.2.170.0190.00317.56
8.2.160.0180.00417.38
8.2.150.0170.00617.50
8.2.140.0120.01117.29
8.2.130.0160.00617.38
8.2.120.0180.00317.49
8.2.110.0150.00817.63
8.2.100.0120.01117.31
8.2.90.0310.00317.50
8.2.80.0270.00217.50
8.2.70.0180.00417.60
8.2.60.0190.00517.47
8.2.50.0200.00517.56
8.2.40.0150.01017.61
8.2.30.0190.00417.44
8.2.20.0200.00517.50
8.2.10.0200.00417.56
8.2.00.0190.00517.37
8.1.330.0120.00922.03
8.1.320.0120.00815.93
8.1.310.0110.00816.09
8.1.300.0060.00320.20
8.1.290.0230.00715.94
8.1.280.0210.00616.00
8.1.270.0190.00417.07
8.1.260.0180.00617.12
8.1.250.0200.00517.24
8.1.240.0170.00717.24
8.1.230.0140.00917.13
8.1.220.0150.00917.24
8.1.210.0200.00217.23
8.1.200.0180.00817.17
8.1.190.0170.00517.24
8.1.180.0180.00317.29
8.1.170.0190.00417.30
8.1.160.0160.00617.30
8.1.150.0130.00917.24
8.1.140.0200.00417.05
8.1.130.0230.00517.17
8.1.120.0240.00717.36
8.1.110.0180.01317.36
8.1.100.0270.00317.22
8.1.90.0230.01017.42
8.1.80.0130.01317.30
8.1.70.0240.00517.43
8.1.60.0230.01217.36
8.1.50.0260.00817.24
8.1.40.0260.00317.42
8.1.30.0280.00617.59
8.1.20.0260.00717.42
8.1.10.0310.00817.42
8.1.00.0230.01117.22

preferences:
32.22 ms | 403 KiB | 5 Q