3v4l.org

run code in 300+ PHP versions simultaneously
<?php strtolower(preg_replace('/((?<=[a-z])(?=[A-Z]))/', '_', 'AbCdEfGh'))

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)
5.4.340.0080.04311.97
5.4.320.0090.04312.46
5.4.310.0040.04112.46
5.4.300.0080.04012.46
5.4.290.0050.03912.46
5.4.280.0090.03812.36
5.4.270.0090.03712.36
5.4.260.0050.04112.36
5.4.250.0080.03712.36
5.4.240.0080.03612.36
5.4.230.0070.03712.35
5.4.220.0040.03912.35
5.4.210.0050.04112.35
5.4.200.0080.04412.35
5.4.190.0040.03712.34
5.4.180.0040.03912.35
5.4.170.0070.03912.36
5.4.160.0060.03412.36
5.4.150.0050.03612.35
5.4.140.0060.03612.04
5.4.130.0060.03512.02
5.4.120.0050.03511.98
5.4.110.0090.03711.98
5.4.100.0080.03711.98
5.4.90.0030.04111.98
5.4.80.0080.03911.98
5.4.70.0070.03711.97
5.4.60.0050.03611.97
5.4.50.0120.03811.97
5.4.40.0030.03811.96
5.4.30.0080.03711.96
5.4.20.0030.03911.96
5.4.10.0060.03411.96
5.4.00.0060.03611.45
5.3.290.0090.04112.80
5.3.280.0060.04412.71
5.3.270.0060.03912.72
5.3.260.0100.03812.72
5.3.250.0060.04312.71
5.3.240.0050.03912.72
5.3.230.0060.04112.71
5.3.220.0090.03412.68
5.3.210.0050.04612.68
5.3.200.0060.03712.68
5.3.190.0070.03912.68
5.3.180.0100.04012.67
5.3.170.0070.03612.67
5.3.160.0070.04112.68
5.3.150.0050.03812.67
5.3.140.0070.03812.66
5.3.130.0050.04112.65
5.3.120.0070.03812.66
5.3.110.0050.04212.66
5.3.100.0070.03712.12
5.3.90.0050.03712.08
5.3.80.0060.04512.07
5.3.70.0080.03712.07
5.3.60.0050.03812.07
5.3.50.0050.03712.00
5.3.40.0070.03512.00
5.3.30.0030.03711.95
5.3.20.0060.03511.73
5.3.10.0040.03711.70
5.3.00.0100.03611.68
5.2.170.0070.0289.18
5.2.160.0040.0299.18
5.2.150.0040.0319.18
5.2.140.0040.0309.18
5.2.130.0020.0319.14
5.2.120.0070.0459.14
5.2.110.0060.0329.14
5.2.100.0040.0369.14
5.2.90.0040.0339.14
5.2.80.0070.0319.14
5.2.70.0080.0319.14
5.2.60.0080.0279.09
5.2.50.0030.0329.06
5.2.40.0040.0349.04
5.2.30.0030.0339.01
5.2.20.0080.0269.01
5.2.10.0050.0298.93
5.2.00.0040.0298.78
5.1.60.0050.0238.07
5.1.50.0070.0238.07
5.1.40.0040.0268.05
5.1.30.0080.0238.40
5.1.20.0070.0258.42
5.1.10.0070.0258.14
5.1.00.0060.0288.14
5.0.50.0040.0216.62
5.0.40.0060.0346.48
5.0.30.0050.0326.29
5.0.20.0030.0206.27
5.0.10.0030.0226.24
5.0.00.0040.0346.23
4.4.90.0050.0144.77
4.4.80.0020.0164.76
4.4.70.0050.0154.76
4.4.60.0020.0164.75
4.4.50.0060.0174.77
4.4.40.0030.0324.71
4.4.30.0030.0154.76
4.4.20.0020.0164.84
4.4.10.0030.0174.85
4.4.00.0030.0284.76
4.3.110.0040.0164.67
4.3.100.0030.0214.67
4.3.90.0020.0264.63
4.3.80.0030.0264.58
4.3.70.0030.0164.63
4.3.60.0050.0304.63
4.3.50.0020.0174.62
4.3.40.0020.0264.53
4.3.30.0010.0183.28
4.3.20.0020.0173.26
4.3.10.0050.0143.21
4.3.00.0030.0207.42

preferences:
147.47 ms | 1398 KiB | 7 Q