3v4l.org

run code in 300+ PHP versions simultaneously
<?php $regex = '/(((?!a).)*)*a\\{/u'; $test_string = 'AAAAAAAAAAAAAA{AA'; echo "1:".mb_ereg_replace($regex,'WORKED',$test_string)."\n"; echo "2:".preg_replace($regex.'','WORKED',$test_string)."\n"; echo "3:".preg_replace($regex,'WORKED',$test_string)."\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)
8.3.60.0130.01717.00
8.3.50.0100.02422.21
8.3.40.0120.00918.87
8.3.30.0100.01019.04
8.3.20.0000.01120.31
8.3.10.0060.00623.79
8.3.00.0060.00619.63
8.2.180.0090.01218.31
8.2.170.0070.01422.96
8.2.160.0100.01020.49
8.2.150.0030.02024.18
8.2.140.0040.00724.66
8.2.130.0060.00626.16
8.2.120.0070.00422.50
8.2.110.0090.00322.48
8.2.100.0000.01818.09
8.2.90.0070.00719.39
8.2.80.0030.01018.05
8.2.70.0000.01617.75
8.2.60.0070.00718.05
8.2.50.0040.01118.07
8.2.40.0000.01418.16
8.2.30.0070.00718.07
8.2.20.0000.01317.94
8.2.10.0000.01318.04
8.2.00.0040.01117.95
8.1.280.0100.01625.92
8.1.270.0060.00623.96
8.1.260.0000.01126.35
8.1.250.0040.00728.09
8.1.240.0030.01023.91
8.1.230.0070.01019.29
8.1.220.0030.01017.78
8.1.210.0070.00718.77
8.1.200.0060.00917.60
8.1.190.0070.00717.53
8.1.180.0060.00818.10
8.1.170.0000.01418.91
8.1.160.0030.01022.01
8.1.150.0030.01018.77
8.1.140.0000.01417.82
8.1.130.0030.00917.82
8.1.120.0000.01317.74
8.1.110.0030.01117.77
8.1.100.0040.01117.70
8.1.90.0030.01017.71
8.1.80.0000.01317.77
8.1.70.0070.00717.62
8.1.60.0060.00917.72
8.1.50.0090.00617.74
8.1.40.0040.01117.69
8.1.30.0030.01117.84
8.1.20.0030.01017.81
8.1.10.0030.01217.72
8.1.00.0060.00917.71
8.0.300.0030.01018.77
8.0.290.0000.01317.17
8.0.280.0070.00718.65
8.0.270.0030.01017.30
8.0.260.0000.01217.26
8.0.250.0030.01017.29
8.0.240.0000.01517.30
8.0.230.0000.01317.15
8.0.220.0030.01017.23
8.0.210.0000.01317.22
8.0.200.0000.01317.29
8.0.190.0030.01117.25
8.0.180.0030.01017.19
8.0.170.0030.01217.27
8.0.160.0080.00617.17
8.0.150.0070.00717.21
8.0.140.0050.00817.16
8.0.130.0000.01213.68
8.0.120.0000.01417.22
8.0.110.0000.01417.18
8.0.100.0030.01017.13
8.0.90.0000.01417.33
8.0.80.0060.01817.20
8.0.70.0070.00717.15
8.0.60.0030.01217.29
8.0.50.0000.01517.16
8.0.30.0180.01517.28
8.0.20.0170.01317.40
8.0.10.0000.01417.22
8.0.00.0060.02616.99
7.4.330.0060.00615.20
7.4.320.0030.01016.81
7.4.300.0030.01016.85
7.4.290.0000.01316.91
7.4.280.0070.00716.76
7.4.270.0030.01016.86
7.4.260.0000.01316.82
7.4.250.0000.01416.69
7.4.240.0030.01016.76
7.4.230.0030.01016.95
7.4.220.0060.03616.76
7.4.210.0060.02216.84
7.4.200.0030.01016.61
7.4.190.0000.01416.92
7.4.160.0070.01816.85
7.4.150.0100.01717.40
7.4.140.0130.02517.86
7.4.130.0080.01916.82
7.4.120.0080.01916.68
7.4.110.0100.01616.79
7.4.100.0130.01616.76
7.4.90.0030.02416.77
7.4.80.0110.02219.39
7.4.70.0100.01716.55
7.4.60.0070.02116.75
7.4.50.0040.01416.63
7.4.40.0100.01422.77
7.4.30.0070.02116.74
7.4.00.0030.01914.92
7.3.330.0000.01113.42
7.3.320.0000.01113.37
7.3.310.0030.01116.61
7.3.300.0030.01016.57
7.3.290.0030.02016.61
7.3.280.0060.02016.54
7.3.270.0100.01917.40
7.3.260.0170.02416.68
7.3.250.0130.02716.49
7.3.240.0180.01816.60
7.3.230.0130.01316.80
7.3.210.0150.01216.70
7.3.200.0110.01719.39
7.3.190.0030.02416.77
7.3.180.0140.01416.63
7.3.170.0090.01816.66
7.3.160.0130.01316.59
7.3.120.0030.02015.08
7.3.10.0130.01016.98
7.3.00.0060.01516.82
7.2.330.0030.02516.72
7.2.320.0130.02316.76
7.2.310.0040.02316.84
7.2.300.0080.02016.86
7.2.290.0070.02016.73
7.2.130.0030.01717.12
7.2.120.0110.01117.06
7.2.110.0000.02217.11
7.2.100.0000.02117.04
7.2.90.0120.00916.80
7.2.80.0120.00616.96
7.2.70.0030.01617.00
7.2.60.0050.01617.03
7.2.50.0090.01916.76
7.2.40.0110.01417.00
7.2.30.0040.02317.05
7.2.20.0070.02217.15
7.2.10.0090.01617.02
7.2.00.0060.01418.43
7.1.250.0070.01415.96
7.1.200.0070.01316.05
7.1.100.0030.01418.13
7.1.70.0000.01917.30
7.1.60.0100.03119.33
7.1.50.0060.02317.23
7.1.00.0000.09322.42
7.0.200.0360.01814.80
7.0.140.0070.08321.99
7.0.60.0070.06719.93
7.0.50.0030.08717.89
7.0.40.0030.05720.01
7.0.30.0200.06020.02
7.0.20.0370.08320.21
7.0.10.0130.06320.23
7.0.00.0130.06020.17
5.6.280.0070.11020.91
5.6.210.0070.12020.54
5.6.200.0100.11318.21
5.6.190.0170.11720.41
5.6.180.0070.08720.63
5.6.170.0270.10720.38
5.6.160.0030.08020.51
5.6.150.0070.07018.21
5.6.140.0100.06318.15
5.6.130.0000.07718.26
5.6.120.0100.10721.14
5.6.110.0170.12321.07
5.6.100.0070.12020.96
5.6.90.0130.10320.96
5.6.80.0030.10320.39
5.6.70.3030.06320.36
5.5.350.0170.11720.41
5.5.340.0000.07317.97
5.5.330.0130.11720.40
5.5.320.0030.12320.16
5.5.310.0300.11320.35
5.5.300.0030.09718.04
5.5.290.0030.12717.91
5.5.280.0100.11720.86
5.5.270.0030.07720.78
5.5.260.0030.06720.87
5.5.250.0170.09720.48
5.5.240.0200.10720.10
5.4.450.0630.10719.50
5.4.440.1200.12019.51
5.4.430.0670.09719.13
5.4.420.1200.14019.66
5.4.410.1000.07719.00
5.4.400.1100.11719.11
5.4.390.0830.11019.19
5.4.380.0370.10018.50
5.4.370.0370.09018.52
5.4.360.0330.09018.79
5.4.350.0270.09718.80
5.4.340.0230.09318.80
5.4.320.0080.06212.48
5.4.310.0030.07212.48
5.4.300.0090.07112.48
5.4.290.0040.06912.47
5.4.280.0030.07312.36
5.4.270.0050.07412.36
5.4.260.0050.08612.36
5.4.250.0050.07312.36
5.4.240.0040.07312.36
5.4.230.0060.06712.35
5.4.220.0050.06612.35
5.4.210.0050.07112.35
5.4.200.0050.08512.35
5.4.190.0020.07412.35
5.4.180.0080.06312.35
5.4.170.0020.07612.36
5.4.160.0090.06312.35
5.4.150.0080.06712.34
5.4.140.0070.08012.03
5.4.130.0070.08012.02
5.4.120.0070.06112.00
5.4.110.0070.06611.99
5.4.100.0070.07711.99
5.4.90.0060.07011.99
5.4.80.0070.06512.00
5.4.70.0050.06911.99
5.4.60.0020.06711.99
5.4.50.0060.07611.99
5.4.40.0090.06011.98
5.4.30.0090.06411.98
5.4.20.0070.06811.98
5.4.10.0070.06811.97
5.4.00.0080.06411.45
5.3.290.0100.07112.80
5.3.280.0130.07912.71
5.3.270.0050.07112.72
5.3.260.0050.07212.71
5.3.250.0070.07012.72
5.3.240.0110.06412.72
5.3.230.0080.09712.71
5.3.220.0060.07712.68
5.3.210.0060.07312.68
5.3.200.0070.06712.68
5.3.190.0080.07412.68
5.3.180.0070.07212.68
5.3.170.0090.10512.67
5.3.160.0150.10612.67
5.3.150.0050.11412.67
5.3.140.0110.10712.66
5.3.130.0100.11312.66
5.3.120.0100.11512.66
5.3.110.0100.11212.66
5.3.100.0200.10012.12
5.3.90.0080.09912.08
5.3.80.0120.10112.07
5.3.70.0180.09812.08
5.3.60.0140.05512.07
5.3.50.0100.05912.00
5.3.40.0080.04312.00
5.3.30.0100.03811.96
5.3.20.0070.04611.75
5.3.10.0050.05811.70
5.3.00.0070.05611.70
5.2.170.0090.0469.19
5.2.160.0090.0419.19
5.2.150.0060.0379.19
5.2.140.0110.0339.19
5.2.130.0050.0459.14
5.2.120.0100.0399.15
5.2.110.0080.0349.15
5.2.100.0080.0319.16
5.2.90.0060.0329.14
5.2.80.0060.0329.14
5.2.70.0060.0329.14
5.2.60.0070.0329.10
5.2.50.0080.0449.07
5.2.40.0100.0319.06
5.2.30.0070.03516.91
5.2.20.0070.03316.90
5.2.10.0030.0348.94
5.2.00.0070.0338.80
5.1.60.0060.1248.09
5.1.50.0090.1668.09
5.1.40.0090.1878.07
5.1.30.0100.1808.42
5.1.20.0090.1458.45
5.1.10.0100.1238.17
5.1.00.0070.1708.17
5.0.50.0070.1686.64
5.0.40.0040.1486.50
5.0.30.0090.1576.31
5.0.20.0120.1376.29
5.0.10.0040.1026.27
5.0.00.0030.1546.25
4.4.90.0040.0964.78
4.4.80.0090.01812.56
4.4.70.0040.02012.55
4.4.60.0060.01812.56
4.4.50.0030.1074.77
4.4.40.0040.1894.71
4.4.30.0060.1644.76
4.4.20.0030.1464.84
4.4.10.0040.1284.85
4.4.00.0010.1064.76
4.3.110.0060.0934.67
4.3.100.0050.0914.66
4.3.90.0060.1124.63
4.3.80.0030.1374.59
4.3.70.0060.0964.63
4.3.60.0040.0964.63
4.3.50.0010.1034.63
4.3.40.0030.1074.54
4.3.30.0030.0173.27
4.3.20.0020.0183.25
4.3.10.0010.0183.21
4.3.00.0170.01310.37

preferences:
47.92 ms | 401 KiB | 5 Q