3v4l.org

run code in 300+ PHP versions simultaneously
<?php $i=0; $time = microtime(true); while($i < 10) { $i++; @preg_replace('/(^|[a-z])([A-Z])/e', 'strtolower(strlen("\\1") ? "\\1_\\2" : "\\2")', 'VeryLongClassName'); } $time = microtime(true) - $time; echo '1: ' . number_format($time, 3) ."\n"; $i=0; $time = microtime(true); while($i < 10) { $i++; preg_replace('/(?!^)[[:upper:]][[:lower:]]/', '$0', preg_replace('/(?!^)[[:upper:]]+/', '_'.'$0', 'VeryLongClassName')); } $time = microtime(true) - $time; echo '2: ' . number_format($time, 3) ."\n";

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)
7.4.00.0070.01115.11
7.3.120.0070.01014.81
7.3.110.0040.01415.20
7.3.100.0030.01014.79
7.3.90.0130.00314.73
7.3.80.0060.00614.77
7.3.70.0070.01015.01
7.3.60.0130.00315.05
7.3.50.0060.01015.00
7.3.40.0090.00614.83
7.3.30.0100.00314.91
7.3.20.0030.01417.09
7.3.10.0100.00316.89
7.3.00.0040.01116.94
7.2.250.0100.00715.27
7.2.240.0120.00815.06
7.2.230.0040.00715.39
7.2.220.0030.01015.29
7.2.210.0030.01315.14
7.2.200.0030.00615.41
7.2.190.0030.01015.37
7.2.180.0060.00615.02
7.2.170.0030.01515.22
7.1.330.0030.01116.06
7.1.320.0070.00715.60
7.1.310.0000.00916.20
7.1.300.0100.00715.74
7.1.290.0090.00615.80
7.1.280.0040.00416.14
7.1.270.0000.01216.09
7.1.260.0100.00315.81
7.1.70.0090.00017.48
7.1.60.0140.01119.40
7.1.50.0070.01817.19
7.1.00.0030.03322.48
7.0.200.0030.00716.86
7.0.140.0000.07322.01
7.0.100.0370.06720.14
7.0.90.0070.08319.81
7.0.80.0030.04019.86
7.0.70.0000.05019.84
7.0.60.0030.04719.88
7.0.50.0130.03320.19
7.0.40.0030.04020.13
7.0.30.0070.04020.00
7.0.20.0100.03719.99
7.0.10.0070.03720.09
7.0.00.0000.06020.04
5.6.280.0000.07720.77
5.6.250.0070.07320.66
5.6.240.0130.07320.55
5.6.230.0070.03320.58
5.6.220.0030.04320.53
5.6.210.0030.04020.57
5.6.200.0030.04321.00
5.6.190.0030.04020.96
5.6.180.0070.04321.03
5.6.170.0070.04321.04
5.6.160.0070.04720.97
5.6.150.0100.03321.07
5.6.140.0070.04020.98
5.6.130.0000.08721.05
5.6.120.0000.04720.89
5.6.110.0070.04320.98
5.6.100.0100.03720.96
5.6.90.0070.03720.86
5.6.80.0070.03720.30
5.6.70.0030.04020.40
5.6.60.0030.04020.41
5.6.50.0030.03320.40
5.6.40.0070.04020.48
5.6.30.0100.04720.33
5.6.20.0070.07320.39
5.6.10.0100.05720.35
5.6.00.0130.06320.37
5.5.380.0030.08020.38
5.5.370.0000.04320.38
5.5.360.0170.02720.28
5.5.350.0030.05020.39
5.5.340.0070.05020.76
5.5.330.0100.03320.75
5.5.320.0070.04320.75
5.5.310.0130.06720.76
5.5.300.0030.04720.73
5.5.290.0030.04320.79
5.5.280.0070.04720.85
5.5.270.0030.04320.68
5.5.260.0030.04320.86
5.5.250.0000.04320.69
5.5.240.0030.04320.20
5.5.230.0030.04720.25
5.5.220.0070.03320.24
5.5.210.0000.03720.13
5.5.200.0100.03020.20
5.5.190.0070.04020.05
5.5.180.0100.07720.11
5.5.160.0100.04020.13
5.5.150.0030.06020.20
5.5.140.0130.05320.19
5.5.130.0130.05020.17
5.5.120.0170.07019.93
5.5.110.0100.05320.20
5.5.100.0030.04020.01
5.5.90.0070.07020.03
5.5.80.0070.08020.00
5.5.70.0030.08020.09
5.5.60.0170.03319.98
5.5.50.0100.03720.00
5.5.40.0130.06720.00
5.5.30.0000.04020.09
5.5.20.0070.06319.98
5.5.10.0100.07320.02
5.5.00.0070.08019.89
5.4.450.0030.04019.18
5.4.440.0030.04319.39
5.4.430.0030.04019.30
5.4.420.0070.03719.50
5.4.410.0030.08319.30
5.4.400.0000.04019.06
5.4.390.0100.04019.17
5.4.380.0100.03019.09
5.4.370.0000.03319.07
5.4.360.0130.03319.07
5.4.350.0000.04019.16
5.4.340.0100.04018.96
5.4.320.0170.07319.12
5.4.310.0030.07319.19
5.4.300.0200.06319.14
5.4.290.0100.07018.97
5.4.280.0100.06718.84
5.4.270.0130.07018.98
5.4.260.0100.06719.05
5.4.250.0100.07018.97
5.4.240.0070.04719.02
5.4.230.0130.06719.11
5.4.220.0030.04318.95
5.4.210.0000.08318.91
5.4.200.0130.03719.10
5.4.190.0030.04019.04
5.4.180.0100.06719.04
5.4.170.0030.06719.09
5.4.160.0030.04019.26
5.4.150.0130.07718.87
5.4.140.0070.07316.37
5.4.130.0100.07016.39
5.4.120.0030.05716.37
5.4.110.0100.05316.50
5.4.100.0070.06716.49
5.4.90.0030.07016.34
5.4.80.0030.04016.38
5.4.70.0100.07016.31
5.4.60.0200.05016.39
5.4.50.0170.06316.41
5.4.40.0100.05316.47
5.4.30.0000.05316.28
5.4.20.0130.06016.43
5.4.10.0070.07716.39
5.4.00.0030.08015.65
5.3.290.0070.06314.68
5.3.280.0100.07314.66
5.3.270.0170.06314.68
5.3.260.0100.08014.60
5.3.250.0170.05714.60
5.3.240.0030.07314.55
5.3.230.0170.06714.68
5.3.220.0070.07314.52
5.3.210.0170.07014.62
5.3.200.0100.04714.54
5.3.190.0100.07314.56
5.3.180.0100.07714.55
5.3.170.0070.04014.49
5.3.160.0030.08014.51
5.3.150.0030.07014.49
5.3.140.0000.08314.57
5.3.130.0070.08014.50
5.3.120.0100.07314.53
5.3.110.0030.07714.54
5.3.100.0030.07314.11
5.3.90.0170.06714.01
5.3.80.0030.06314.08
5.3.70.0100.06713.96
5.3.60.0100.07314.02
5.3.50.0100.06713.95
5.3.40.0100.07313.92
5.3.30.0100.07013.90
5.3.20.0070.06313.71
5.3.10.0070.07013.62
5.3.00.0070.07313.50
5.2.170.0000.07011.27
5.2.160.0100.05711.19
5.2.150.0070.05711.24
5.2.140.0030.03711.30
5.2.130.0030.06311.16
5.2.120.0100.05711.14
5.2.110.0030.06311.11
5.2.100.0030.05011.08
5.2.90.0070.05711.24
5.2.80.0030.04311.25
5.2.70.0070.03711.29
5.2.60.0100.05011.11
5.2.50.0030.04311.10
5.2.40.0100.04711.04
5.2.30.0030.07011.03
5.2.20.0030.06711.15
5.2.10.0030.03310.91
5.2.00.0030.06010.82
5.1.60.0000.05710.02
5.1.50.0030.05310.26
5.1.40.0000.03010.21
5.1.30.0030.05710.48
5.1.20.0030.05010.50
5.1.10.0070.04710.31
5.1.00.0030.06010.32
5.0.50.0070.0438.81
5.0.40.0030.0238.49
5.0.30.0030.0438.26
5.0.20.0000.0378.28
5.0.10.0070.0408.21
5.0.00.0030.0538.42
4.4.90.0030.0337.55
4.4.80.0070.0307.55
4.4.70.0070.0337.55
4.4.60.0030.0277.55
4.4.50.0000.0337.55
4.4.40.0030.0507.55
4.4.30.0030.0277.55
4.4.20.0030.0337.55
4.4.10.0030.0377.55
4.4.00.0030.0537.55
4.3.110.0100.0207.55
4.3.100.0000.0307.55
4.3.90.0000.0337.55
4.3.80.0000.0377.55
4.3.70.0030.0207.55
4.3.60.0030.0277.55
4.3.50.0100.0277.55
4.3.40.0070.0437.55
4.3.30.0070.0237.55
4.3.20.0000.0377.55
4.3.10.0030.0337.55
4.3.00.0000.0177.55

preferences:
36.41 ms | 401 KiB | 5 Q