3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo 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)
8.3.40.0140.00018.89
8.3.30.0140.00019.08
8.3.20.0000.00820.38
8.3.10.0050.00323.48
8.3.00.0080.00019.51
8.2.170.0120.00322.96
8.2.160.0100.00322.20
8.2.150.0090.00024.18
8.2.140.0080.00024.66
8.2.130.0090.00626.16
8.2.120.0090.00020.70
8.2.110.0090.00021.14
8.2.100.0090.00317.91
8.2.90.0030.00517.96
8.2.80.0040.00420.59
8.2.70.0040.00417.75
8.2.60.0000.00817.91
8.2.50.0000.00818.07
8.2.40.0060.00318.07
8.2.30.0050.00517.94
8.2.20.0040.00417.74
8.2.10.0050.00317.83
8.2.00.0040.00417.71
8.1.270.0070.00320.70
8.1.260.0030.00526.35
8.1.250.0110.00728.09
8.1.240.0200.00323.78
8.1.230.0040.00722.66
8.1.220.0030.00517.74
8.1.210.0040.00418.77
8.1.200.0070.00317.22
8.1.190.0080.00017.23
8.1.180.0040.00418.10
8.1.170.0060.00320.56
8.1.160.0060.00321.97
8.1.150.0000.00718.79
8.1.140.0000.00717.49
8.1.130.0070.00017.78
8.1.120.0000.00717.48
8.1.110.0080.00017.47
8.1.100.0000.00717.48
8.1.90.0030.00517.37
8.1.80.0000.00817.46
8.1.70.0050.00317.41
8.1.60.0060.00317.50
8.1.50.0040.00417.50
8.1.40.0110.00017.57
8.1.30.0050.00517.70
8.1.20.0060.00317.64
8.1.10.0080.00017.50
8.1.00.0040.00417.34
8.0.300.0000.00820.09
8.0.290.0080.00016.88
8.0.280.0030.00318.39
8.0.270.0000.00717.13
8.0.260.0060.00017.21
8.0.250.0030.00517.13
8.0.240.0030.00317.13
8.0.230.0030.00317.06
8.0.220.0040.00416.84
8.0.210.0030.00316.97
8.0.200.0080.00017.02
8.0.190.0070.00017.02
8.0.180.0040.00416.88
8.0.170.0000.00717.00
8.0.160.0070.00016.90
8.0.150.0000.00716.90
8.0.140.0040.00416.83
8.0.130.0030.00313.39
8.0.120.0040.00416.95
8.0.110.0000.00816.92
8.0.100.0040.00317.03
8.0.90.0000.00716.81
8.0.80.0070.01016.94
8.0.70.0040.00316.99
8.0.60.0030.00517.03
8.0.50.0000.00716.83
8.0.30.0120.00917.15
8.0.20.0140.00617.40
8.0.10.0040.00416.89
8.0.00.0130.01016.92
7.4.330.0050.00015.04
7.4.320.0030.00316.69
7.4.300.0000.00616.59
7.4.290.0000.00716.66
7.4.280.0060.00316.62
7.4.270.0030.00316.59
7.4.260.0040.00416.46
7.4.250.0000.00716.54
7.4.240.0020.00516.63
7.4.230.0030.00316.47
7.4.220.0210.00716.53
7.4.210.0050.01116.62
7.4.200.0040.00416.38
7.4.160.0100.00616.53
7.4.150.0120.00617.40
7.4.140.0070.01017.86
7.4.130.0130.00616.54
7.4.120.0050.01116.66
7.4.110.0090.00916.47
7.4.100.0060.01016.60
7.4.90.0030.01416.90
7.4.80.0070.01019.39
7.4.70.0140.00316.55
7.4.60.0150.01116.54
7.4.50.0040.00416.65
7.4.40.0090.01316.75
7.4.30.0100.01316.64
7.4.00.0070.00715.16
7.3.330.0000.00513.24
7.3.320.0030.00313.09
7.3.310.0040.00316.21
7.3.300.0030.00516.29
7.3.290.0040.01116.34
7.3.280.0120.00616.36
7.3.270.0110.00617.40
7.3.260.0140.00716.66
7.3.250.0090.01316.45
7.3.240.0090.00616.45
7.3.230.0040.01216.39
7.3.210.0080.01116.30
7.3.200.0130.00319.39
7.3.190.0030.01516.46
7.3.180.0160.00016.61
7.3.170.0060.01016.69
7.3.160.0040.01416.55
7.2.330.0150.01116.71
7.2.320.0040.01816.57
7.2.310.0030.01316.67
7.2.300.0120.00616.57
7.2.290.0070.01016.77
7.2.60.0080.00816.74
7.1.200.0060.00616.00
7.1.70.0000.01117.37
7.1.60.0130.01319.32
7.1.50.0140.01017.11
7.1.00.0030.07722.39
7.0.200.0030.00716.81
7.0.140.0030.07022.12
7.0.100.0070.04719.83
7.0.90.0030.06319.99
7.0.80.0470.06719.83
7.0.70.0500.07319.87
7.0.60.0430.08019.93
7.0.50.0470.08020.37
7.0.40.0130.06320.13
7.0.30.0130.08020.11
7.0.20.0030.06020.01
7.0.10.0070.06320.02
7.0.00.0100.08020.11
5.6.280.0030.07321.09
5.6.250.0130.08020.70
5.6.240.0030.06320.68
5.6.230.0070.05720.45
5.6.220.0100.07020.59
5.6.210.0030.07720.40
5.6.200.0100.08021.02
5.6.190.0130.07721.04
5.6.180.0170.07021.01
5.6.170.0030.06721.09
5.6.160.0130.04021.02
5.6.150.0100.08021.13
5.6.140.0170.07321.07
5.6.130.0070.08721.03
5.6.120.0170.07021.13
5.6.110.0200.07021.07
5.6.100.0130.07320.91
5.6.90.0130.07021.05
5.6.80.0170.07020.48
5.6.70.0100.07720.29
5.6.60.0130.04020.39
5.6.50.0000.05020.49
5.6.40.0100.07720.38
5.6.30.0030.07720.32
5.6.20.0170.06720.41
5.6.10.0130.05720.36
5.6.00.0070.07020.39
5.5.380.0030.06320.31
5.5.370.0170.06020.31
5.5.360.0100.07720.29
5.5.350.0100.07720.33
5.5.340.0070.08020.87
5.5.330.0100.08320.87
5.5.320.0100.08020.77
5.5.310.0130.06320.75
5.5.300.0100.08320.75
5.5.290.0030.08020.89
5.5.280.0070.08720.85
5.5.270.0130.08720.78
5.5.260.0030.07320.75
5.5.250.0000.08320.70
5.5.240.0070.04720.00
5.5.230.0030.05020.17
5.5.220.0100.07020.19
5.5.210.0100.08020.20
5.5.200.0030.08320.22
5.5.190.0070.04720.24
5.5.180.0030.08720.11
5.5.160.0070.05020.25
5.5.150.0230.05720.07
5.5.140.0030.06720.22
5.5.130.0100.06320.21
5.5.120.0070.08020.16
5.5.110.0070.07720.26
5.5.100.0030.07019.95
5.5.90.0000.08320.07
5.5.80.0100.07720.10
5.5.70.0100.03720.14
5.5.60.0170.05720.11
5.5.50.0030.04020.14
5.5.40.0030.08019.99
5.5.30.0000.07720.07
5.5.20.0030.07720.13
5.5.10.0170.05720.12
5.5.00.0100.08020.02
5.4.450.0070.08319.39
5.4.440.0100.06719.39
5.4.430.0070.08019.44
5.4.420.0130.07319.42
5.4.410.0130.07319.32
5.4.400.0200.05319.23
5.4.390.0070.07319.03
5.4.380.0170.07019.12
5.4.370.0030.07318.96
5.4.360.0000.08318.95
5.4.350.0070.05019.09
5.4.340.0030.06719.03
5.4.320.0070.07719.23
5.4.310.0070.06018.95
5.4.300.0100.03318.94
5.4.290.0100.06319.11
5.4.280.0070.05718.80
5.4.270.0070.08018.99
5.4.260.0100.06019.13
5.4.250.0030.04019.09
5.4.240.0070.05718.94
5.4.230.0100.03318.77
5.4.220.0030.07718.84
5.4.210.0070.06019.04
5.4.200.0170.06318.89
5.4.190.0100.06319.01
5.4.180.0030.07718.77
5.4.170.0100.07319.13
5.4.160.0130.04319.12
5.4.150.0100.05318.96
5.4.140.0100.06716.41
5.4.130.0030.04716.05
5.4.120.0100.06716.29
5.4.110.0200.04016.45
5.4.100.0100.06716.43
5.4.90.0070.08016.20
5.4.80.0000.04716.29
5.4.70.0100.05316.29
5.4.60.0200.04316.21
5.4.50.0030.04716.19
5.4.40.0130.07016.28
5.4.30.0070.04016.31
5.4.20.0070.04016.38
5.4.10.0000.04716.18
5.4.00.0070.04315.71
5.3.290.0130.06714.60
5.3.280.0100.06014.44
5.3.270.0070.07014.59
5.3.260.0000.07714.42
5.3.250.0070.03714.58
5.3.240.0030.07314.50
5.3.230.0130.07314.45
5.3.220.0100.06014.53
5.3.210.0100.07314.40
5.3.200.0130.07314.57
5.3.190.0100.04714.52
5.3.180.0100.07014.52
5.3.170.0130.07714.54
5.3.160.0070.07014.55
5.3.150.0070.05014.39
5.3.140.0070.07014.50
5.3.130.0070.04014.41
5.3.120.0100.05714.50
5.3.110.0100.05314.53
5.3.100.0070.07313.89
5.3.90.0200.06313.87
5.3.80.0130.04713.98
5.3.70.0030.07313.97
5.3.60.0170.06713.98
5.3.50.0070.07313.85
5.3.40.0100.07013.89
5.3.30.0100.04713.76
5.3.20.0000.07713.54
5.3.10.0070.07713.41
5.3.00.0170.06013.39
5.2.170.0030.04311.21
5.2.160.0030.05311.13
5.2.150.0130.05011.18
5.2.140.0230.01711.05
5.2.130.0070.06011.07
5.2.120.0030.06310.89
5.2.110.0000.05310.95
5.2.100.0030.06711.09
5.2.90.0030.05011.09
5.2.80.0100.06011.16
5.2.70.0070.03011.13
5.2.60.0070.04710.97
5.2.50.0070.05011.01
5.2.40.0030.06010.99
5.2.30.0070.04310.83
5.2.20.0000.04710.76
5.2.10.0070.04310.86
5.2.00.0130.04710.63
5.1.60.0030.0439.83
5.1.50.0000.0479.79
5.1.40.0030.0409.81
5.1.30.0100.03710.39
5.1.20.0100.05710.25
5.1.10.0070.05310.05
5.1.00.0100.04310.05
5.0.50.0000.0479.32
5.0.40.0030.0209.32
5.0.30.0000.0409.32
5.0.20.0000.0279.32
5.0.10.0030.0379.32
5.0.00.0030.0609.32
4.4.90.0000.0239.32
4.4.80.0000.0179.32
4.4.70.0030.0239.32
4.4.60.0000.0339.32
4.4.50.0000.0239.32
4.4.40.0000.0579.32
4.4.30.0030.0309.32
4.4.20.0030.0309.32
4.4.10.0000.0209.32
4.4.00.0070.0239.32
4.3.110.0030.0339.32
4.3.100.0070.0239.32
4.3.90.0000.0279.32
4.3.80.0030.0409.32
4.3.70.0030.0339.32
4.3.60.0030.0209.32
4.3.50.0030.0339.32
4.3.40.0000.0379.32
4.3.30.0030.0209.32
4.3.20.0000.0379.32
4.3.10.0000.0179.32
4.3.00.0030.0279.32

preferences:
45.67 ms | 400 KiB | 5 Q