3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(preg_match('b(?<a>a)?', 'xxxxbxxxx'));

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)
8.3.60.0110.00718.20
8.3.50.0120.00721.14
8.3.40.0110.00818.64
8.3.30.0100.00720.34
8.3.20.0000.00720.16
8.3.10.0040.00422.13
8.3.00.0050.00322.58
8.2.180.0110.00416.71
8.2.170.0120.00622.96
8.2.160.0130.00020.35
8.2.150.0050.00224.18
8.2.140.0040.00424.66
8.2.130.0080.00026.16
8.2.120.0040.00419.41
8.2.110.0070.00422.14
8.2.100.0100.00019.39
8.2.90.0060.00319.11
8.2.80.0000.00819.45
8.2.70.0030.00617.37
8.2.60.0050.00217.80
8.2.50.0040.00418.07
8.2.40.0070.00018.03
8.2.30.0030.00517.87
8.2.20.0070.00017.41
8.2.10.0040.00417.53
8.2.00.0040.00417.62
8.1.280.0070.00725.92
8.1.270.0080.00020.25
8.1.260.0070.00026.35
8.1.250.0050.00328.09
8.1.240.0030.00623.91
8.1.230.0030.00719.14
8.1.220.0030.00617.74
8.1.210.0050.00318.77
8.1.200.0060.00617.22
8.1.190.0050.00317.40
8.1.180.0060.00320.10
8.1.170.0080.00018.58
8.1.160.0070.00022.13
8.1.150.0040.00418.51
8.1.140.0000.00817.34
8.1.130.0000.00717.68
8.1.120.0070.00017.25
8.1.110.0000.00817.18
8.1.100.0000.00817.28
8.1.90.0070.00017.21
8.1.80.0040.00417.37
8.1.70.0000.00717.20
8.1.60.0040.00417.44
8.1.50.0000.00717.36
8.1.40.0030.00617.31
8.1.30.0000.00817.50
8.1.20.0000.00817.43
8.1.10.0030.00517.28
8.1.00.0000.00817.33
8.0.300.0000.00718.77
8.0.290.0000.00716.93
8.0.280.0000.00718.30
8.0.270.0030.00317.01
8.0.260.0060.00016.75
8.0.250.0030.00316.86
8.0.240.0070.00016.92
8.0.230.0070.00016.89
8.0.220.0030.00316.82
8.0.210.0070.00016.83
8.0.200.0000.00816.78
8.0.190.0030.00516.79
8.0.180.0040.00416.86
8.0.170.0000.00816.75
8.0.160.0020.00516.76
8.0.150.0040.00416.81
8.0.140.0070.00316.79
8.0.130.0000.00513.22
8.0.120.0000.00816.72
8.0.110.0070.00016.90
8.0.100.0050.00216.68
8.0.90.0050.00316.68
8.0.80.0030.01216.82
8.0.70.0050.00316.69
8.0.60.0030.00416.66
8.0.50.0070.00016.89
8.0.30.0110.01017.04
8.0.20.0170.00817.40
8.0.10.0000.00716.91
8.0.00.0090.01416.51
7.4.330.0020.00215.00
7.4.320.0000.00716.43
7.4.300.0000.00716.36
7.4.290.0000.00716.47
7.4.280.0000.00616.27
7.4.270.0000.00716.38
7.4.260.0030.00316.45
7.4.250.0040.00416.41
7.4.240.0000.00716.38
7.4.230.0000.00616.35
7.4.220.0110.00716.38
7.4.210.0090.00916.42
7.4.200.0000.00716.58
7.4.190.0030.00316.34
7.4.160.0130.00316.30
7.4.150.0040.01317.40
7.4.140.0100.00717.86
7.4.130.0120.00716.55
7.4.120.0130.00316.43
7.4.110.0070.01116.47
7.4.100.0060.01616.48
7.4.90.0130.00316.36
7.4.80.0110.00619.39
7.4.70.0100.00716.07
7.4.60.0170.00316.32
7.4.50.0050.00016.38
7.4.40.0060.00622.77
7.4.30.0030.01216.33
7.4.00.0090.00914.76
7.3.330.0020.00212.95
7.3.320.0000.00513.13
7.3.310.0050.00216.13
7.3.300.0060.00016.19
7.3.290.0120.00316.25
7.3.280.0090.00616.25
7.3.270.0090.00917.40
7.3.260.0110.00516.39
7.3.250.0090.01116.31
7.3.240.0120.00616.15
7.3.230.0100.00716.44
7.3.210.0090.01416.21
7.3.200.0130.00319.39
7.3.190.0060.01616.34
7.3.180.0090.00616.26
7.3.170.0040.01216.27
7.3.160.0140.00016.34
7.3.120.0090.00914.72
7.3.10.0060.01016.36
7.3.00.0080.00816.38
7.2.330.0100.00716.25
7.2.320.0100.00716.23
7.2.310.0030.01316.42
7.2.300.0060.00916.41
7.2.290.0130.00316.39
7.2.130.0080.00816.57
7.2.120.0050.00716.55
7.2.110.0050.00816.47
7.2.100.0060.01016.41
7.2.90.0070.00916.54
7.2.80.0090.00316.52
7.2.70.0090.00816.61
7.2.60.0100.00516.51
7.2.50.0130.00516.52
7.2.40.0010.01416.81
7.2.30.0060.01116.62
7.2.20.0070.00716.48
7.2.10.0070.01116.53
7.2.00.0040.00817.17
7.1.250.0070.00815.58
7.1.100.0060.00817.88
7.1.70.0040.00417.19
7.1.60.0030.01017.18
7.1.50.0130.00916.94
7.1.00.0030.03722.45
7.0.200.0100.00316.69
7.0.140.0130.06721.99
7.0.60.0070.06719.92
7.0.50.0000.04317.77
7.0.40.0100.07020.30
7.0.30.0200.04720.21
7.0.20.0300.07320.00
7.0.10.0270.04320.00
7.0.00.0100.08020.08
5.6.280.0000.07721.10
5.6.210.0000.08720.77
5.6.200.0130.07318.12
5.6.190.0100.07020.60
5.6.180.4030.04320.63
5.6.170.0330.06320.47
5.6.160.0070.06720.33
5.6.150.0070.08318.09
5.6.140.0130.07018.21
5.6.130.0070.04718.16
5.6.120.0200.07021.11
5.6.110.0070.08321.08
5.6.100.0070.08321.03
5.6.90.0230.07720.87
5.6.80.0030.08020.43
5.6.70.0200.07720.49
5.5.350.0270.03320.38
5.5.340.0000.06017.91
5.5.330.0000.04720.19
5.5.320.0170.04320.29
5.5.310.0170.05720.12
5.5.300.0070.06317.88
5.5.290.0000.04318.00
5.5.280.0170.07720.76
5.5.270.0130.06020.95
5.5.260.0170.03320.86
5.5.250.0070.05720.79
5.5.240.0030.03720.23
5.4.450.0130.05319.55
5.4.440.0030.06319.43
5.4.430.0130.06719.46
5.4.420.0630.07019.22
5.4.410.0400.06019.50
5.4.400.0930.07018.64
5.4.390.0430.06318.48
5.4.380.0200.06018.65
5.4.370.0230.05718.49
5.4.360.0230.04318.68
5.4.350.0090.03711.97
5.4.340.0050.03711.96
5.4.320.0110.03212.45
5.4.310.0060.03812.45
5.4.300.0090.03612.45
5.4.290.0050.04212.45
5.4.280.0050.03612.34
5.4.270.0040.03812.35
5.4.260.0100.03812.34
5.4.250.0130.04718.87
5.4.240.0000.06018.84
5.4.230.0270.06718.69
5.4.220.0030.06318.90
5.4.210.0070.05318.87
5.4.200.0100.06018.83
5.4.190.0100.07018.85
5.4.180.0270.04718.91
5.4.170.0100.05318.90
5.4.160.0030.05318.89
5.4.150.0100.07018.90
5.4.140.0070.06016.21
5.4.130.0030.06016.31
5.4.120.0170.04716.41
5.4.110.0100.07316.50
5.4.100.0130.04716.40
5.4.90.0200.05716.25
5.4.80.0170.04716.24
5.4.70.0070.05316.43
5.4.60.0000.05716.50
5.4.50.0100.05016.32
5.4.40.0130.04316.55
5.4.30.0130.04716.20
5.4.20.0070.06316.43
5.4.10.0000.05716.45
5.4.00.0070.04715.68
5.3.290.0020.04312.80
5.3.280.0130.05014.51
5.3.270.0100.05014.64
5.3.260.0070.05714.30
5.3.250.0000.06014.30
5.3.240.0070.05014.59
5.3.230.0100.05714.61
5.3.220.0030.05714.58
5.3.210.0070.05714.58
5.3.200.0070.05314.41
5.3.190.0130.06714.40
5.3.180.0030.06014.33
5.3.170.0100.06014.57
5.3.160.0070.05314.57
5.3.150.0000.06014.33
5.3.140.0100.04314.60
5.3.130.0100.05014.55
5.3.120.0070.05714.24
5.3.110.0130.05714.56
5.3.100.0000.05714.18
5.3.90.0100.04314.02
5.3.80.0070.05014.03
5.3.70.0070.07313.88
5.3.60.0030.05013.88
5.3.50.0030.05013.94
5.3.40.0030.05013.89
5.3.30.0100.04713.84
5.3.20.0030.05313.57
5.3.10.0030.05013.58
5.3.00.0100.06713.55
5.2.170.0100.03311.14
5.2.160.0030.06311.14
5.2.150.0030.05711.07
5.2.140.0000.04711.14
5.2.130.0030.04311.01
5.2.120.0230.02710.95
5.2.110.0030.05711.03
5.2.100.0030.04011.20
5.2.90.0000.04711.20
5.2.80.0100.03311.18
5.2.70.0100.05011.09
5.2.60.0070.04010.88
5.2.50.0070.06011.03
5.2.40.0100.03710.82
5.2.30.0070.03711.08
5.2.20.0070.03711.06
5.2.10.0070.05310.86
5.2.00.0070.03710.88
5.1.60.0070.03010.05
5.1.50.0030.0339.91
5.1.40.0070.04710.00
5.1.30.0030.03310.39
5.1.20.0030.04010.43
5.1.10.0070.0439.84
5.1.00.0030.03710.00
5.0.50.0000.0308.30
5.0.40.0030.0238.43
5.0.30.0030.0408.45
5.0.20.0000.0278.27
5.0.10.0030.0308.36
5.0.00.0100.0378.15
4.4.90.0000.0276.39
4.4.80.0000.0236.39
4.4.70.0030.0206.39
4.4.60.0000.0236.39
4.4.50.0030.0206.39
4.4.40.0030.0476.39
4.4.30.0070.0176.39
4.4.20.0070.0306.39
4.4.10.0030.0206.39
4.4.00.0000.0336.39
4.3.110.0030.0206.39
4.3.100.0030.0306.39
4.3.90.0030.0236.39
4.3.80.0070.0276.39
4.3.70.0000.0336.39
4.3.60.0000.0336.39
4.3.50.0030.0206.39
4.3.40.0000.0336.39
4.3.30.0000.0236.39
4.3.20.0070.0236.39
4.3.10.0000.0236.39
4.3.00.0100.0206.84

preferences:
34.27 ms | 401 KiB | 5 Q