3v4l.org

run code in 300+ PHP versions simultaneously
<?php ini_set("display_errors", "On"); $regex = '(((?!a).)*)*a\\{'; $test_string = 'AAAAAAAAAAAAAA{AA'; echo "1:".mb_ereg_replace($regex,'WORKED',$test_string)."\n"; echo "2:".preg_replace('/'.$regex.'/u','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)
8.3.60.0090.01216.63
8.3.50.0090.02122.16
8.3.40.0130.01018.80
8.3.30.0070.01419.04
8.3.20.0080.00420.33
8.3.10.0030.00823.61
8.3.00.0040.00819.51
8.2.180.0110.02116.50
8.2.170.0110.01122.96
8.2.160.0070.01420.57
8.2.150.0080.00324.18
8.2.140.0080.00324.66
8.2.130.0230.00726.16
8.2.120.0040.00822.33
8.2.110.0060.00622.56
8.2.100.0070.01017.97
8.2.90.0070.00719.32
8.2.80.0070.00718.05
8.2.70.0040.01117.75
8.2.60.0000.01418.03
8.2.50.0040.01118.07
8.2.40.0030.01018.16
8.2.30.0000.01318.16
8.2.20.0030.01017.92
8.2.10.0100.00318.22
8.2.00.0040.01118.03
8.1.280.0160.01625.92
8.1.270.0060.00622.06
8.1.260.0040.00826.35
8.1.250.0070.00428.09
8.1.240.0070.00723.91
8.1.230.0070.01019.02
8.1.220.0030.01017.79
8.1.210.0000.01418.77
8.1.200.0000.01617.50
8.1.190.0030.01017.65
8.1.180.0070.00718.10
8.1.170.0060.00918.84
8.1.160.0070.00722.10
8.1.150.0030.01118.88
8.1.140.0000.01317.70
8.1.130.0000.01319.59
8.1.120.0030.01017.78
8.1.110.0000.01817.70
8.1.100.0030.01017.73
8.1.90.0080.00617.75
8.1.80.0100.00317.77
8.1.70.0070.00717.64
8.1.60.0040.01117.71
8.1.50.0040.01117.76
8.1.40.0000.01417.82
8.1.30.0000.01417.95
8.1.20.0030.01318.04
8.1.10.0000.01417.77
8.1.00.0000.01417.79
8.0.300.0070.00718.77
8.0.290.0080.00617.41
8.0.280.0000.01318.53
8.0.270.0030.01017.42
8.0.260.0000.01319.01
8.0.250.0060.00617.29
8.0.240.0000.01317.18
8.0.230.0030.01017.23
8.0.220.0000.01417.19
8.0.210.0030.01017.20
8.0.200.0030.00917.38
8.0.190.0040.01117.34
8.0.180.0040.01117.32
8.0.170.0000.01417.24
8.0.160.0000.01317.37
8.0.150.0000.01417.08
8.0.140.0000.01417.10
8.0.130.0040.00813.71
8.0.120.0060.00917.25
8.0.110.0030.01117.21
8.0.100.0070.00717.14
8.0.90.0030.01017.21
8.0.80.0100.02717.30
8.0.70.0000.01317.29
8.0.60.0030.01017.14
8.0.50.0000.01417.30
8.0.30.0130.02217.52
8.0.20.0130.02917.45
8.0.10.0030.01017.23
8.0.00.0100.01917.00
7.4.330.0000.01115.00
7.4.320.0040.00816.85
7.4.300.0040.00816.88
7.4.290.0030.01016.90
7.4.280.0000.01416.88
7.4.270.0030.01016.81
7.4.260.0030.01016.76
7.4.250.0090.00616.67
7.4.240.0020.01216.82
7.4.230.0030.01017.00
7.4.220.0040.02516.74
7.4.210.0060.02316.90
7.4.200.0030.01016.55
7.4.190.0070.00716.93
7.4.160.0070.01816.76
7.4.150.0060.03217.40
7.4.140.0130.02017.86
7.4.130.0050.02216.95
7.4.120.0060.02216.74
7.4.110.0130.01416.71
7.4.100.0100.01716.62
7.4.90.0150.01116.75
7.4.80.0030.02719.39
7.4.70.0090.01716.57
7.4.60.0130.01316.86
7.4.50.0000.01716.88
7.4.40.0060.01622.77
7.4.30.0150.01116.72
7.4.00.0040.01815.37
7.3.330.0030.01013.47
7.3.320.0030.01013.46
7.3.310.0030.01016.43
7.3.300.0030.01016.47
7.3.290.0100.02416.67
7.3.280.0110.01716.54
7.3.270.0120.01617.40
7.3.260.0090.01916.71
7.3.250.0080.02316.73
7.3.240.0140.02416.77
7.3.230.0200.00816.77
7.3.210.0000.02716.70
7.3.200.0130.01619.39
7.3.190.0090.01816.84
7.3.180.0030.02416.56
7.3.170.0040.02216.58
7.3.160.0150.01816.79
7.3.120.0000.02114.93
7.2.330.0130.01616.70
7.2.320.0100.02316.75
7.2.310.0070.02116.89
7.2.300.0100.01716.77
7.2.290.0060.02916.66
7.2.60.0140.00717.16
7.2.00.0160.01019.66
7.1.200.0140.01815.83
7.1.100.0000.02218.33
7.1.70.0030.01317.36
7.1.60.0040.02619.33
7.1.50.0100.02717.35
7.1.00.0000.09022.35
7.0.200.0170.01414.87
7.0.140.0130.07322.10
7.0.60.0300.06319.82
7.0.50.0000.05717.88
7.0.40.0230.07720.05
7.0.30.0230.06320.11
7.0.20.0330.05320.21
7.0.10.0030.06020.03
7.0.00.0030.08020.10
5.6.280.0030.12720.91
5.6.210.0130.11320.66
5.6.200.0070.10318.12
5.6.190.0100.11720.29
5.6.180.0200.11020.46
5.6.170.0270.06320.46
5.6.160.0100.11320.53
5.6.150.0170.11318.24
5.6.140.0130.12018.18
5.6.130.0100.12718.08
5.6.120.0100.12021.03
5.6.110.0130.11720.98
5.6.100.0130.11720.99
5.6.90.0170.12021.06
5.6.80.0100.10720.48
5.5.350.0070.11720.40
5.5.340.0070.11718.04
5.5.330.0100.12020.40
5.5.320.0200.07320.44
5.5.310.0230.10720.22
5.5.300.0030.06718.01
5.5.290.0130.11718.04
5.5.280.0100.10720.68
5.5.270.0030.12720.86
5.5.260.0030.10320.88
5.5.250.0070.12020.68
5.5.240.0330.10020.35
5.4.450.0330.14719.44
5.4.440.0830.11719.61
5.4.430.0830.09319.28
5.4.420.0000.10719.49
5.4.410.0100.10019.48
5.4.400.0230.09319.19
5.4.390.0130.10019.22
5.4.380.1130.10318.71
5.4.370.1100.10318.68
5.4.360.0670.10318.82
5.4.350.0670.09318.77
5.4.340.0870.09718.64
5.4.320.0080.06212.49
5.4.310.0030.10212.48
5.4.300.0050.07012.48
5.4.290.0060.07112.48
5.4.280.0130.10912.36
5.4.270.0080.12412.36
5.4.260.0070.10512.36
5.4.250.0090.10612.36
5.4.240.0130.11412.36
5.4.230.0070.11312.35
5.4.220.0090.11612.36
5.4.210.0150.11212.36
5.4.200.0040.09612.36
5.4.190.0080.07312.35
5.4.180.0070.10012.35
5.4.170.0110.13112.36
5.4.160.0140.11812.36
5.4.150.0100.07112.35
5.4.140.0150.15812.03
5.4.130.0150.10812.02
5.4.120.0180.10012.00
5.4.110.0130.09212.00
5.4.100.0120.10812.00
5.4.90.0130.10912.00
5.4.80.0090.08012.00
5.4.70.0070.06811.99
5.4.60.0050.06611.99
5.4.50.0080.06712.00
5.4.40.0120.07111.98
5.4.30.0120.07111.98
5.4.20.0110.07811.98
5.4.10.0070.08511.98
5.4.00.0150.10311.45
5.3.290.0090.06512.80
5.3.280.0130.11012.71
5.3.270.0120.10412.73
5.3.260.0110.07512.72
5.3.250.0100.07212.72
5.3.240.0100.10412.72
5.3.230.0100.11212.71
5.3.220.0140.10312.68
5.3.210.0110.09512.68
5.3.200.0080.06912.68
5.3.190.0100.10012.68
5.3.180.0120.15212.67
5.3.170.0110.10612.67
5.3.160.0090.11512.68
5.3.150.0130.13512.67
5.3.140.0100.13412.66
5.3.130.0100.12512.66
5.3.120.0100.12412.66
5.3.110.0070.12312.66
5.3.100.0080.10912.12
5.3.90.0090.10012.09
5.3.80.0150.12412.08
5.3.70.0090.07612.07
5.3.60.0130.06212.06
5.3.50.0130.05612.00
5.3.40.0120.07712.00
5.3.30.0190.06611.96
5.3.20.0130.06611.74
5.3.10.0170.07511.71
5.3.00.0080.04811.70
5.2.170.0060.0559.19
5.2.160.0070.0589.20
5.2.150.0110.0669.19
5.2.140.0050.0599.19
5.2.130.0050.0559.14
5.2.120.0100.0519.14
5.2.110.0110.0529.15
5.2.100.0140.0799.15
5.2.90.0110.0349.15
5.2.80.0060.0529.14
5.2.70.0050.0499.14
5.2.60.0070.0519.10
5.2.50.0100.0519.07
5.2.40.0140.0529.07
5.2.30.0140.04116.91
5.2.20.0140.03716.90
5.2.10.0060.0498.94
5.2.00.0060.0478.80
5.1.60.0030.1538.09
5.1.50.0100.2368.09
5.1.40.0080.1748.08
5.1.30.0030.1818.43
5.1.20.0050.1808.45
5.1.10.0070.1278.18
5.1.00.0070.1358.18
5.0.50.0040.1296.65
5.0.40.0070.1016.50
5.0.30.0100.1176.32
5.0.20.0060.1516.29
5.0.10.0090.1136.27
5.0.00.0060.1046.26
4.4.90.0050.1054.78
4.4.80.0090.01812.56
4.4.70.0060.01812.55
4.4.60.0090.01812.55
4.4.50.0080.1304.77
4.4.40.0040.1384.71
4.4.30.0080.1664.76
4.4.20.0050.1224.85
4.4.10.0040.1354.85
4.4.00.0050.1574.76
4.3.110.0070.1274.67
4.3.100.0060.1254.66
4.3.90.0060.1354.63
4.3.80.0060.1724.58
4.3.70.0100.1504.63
4.3.60.0030.1514.63
4.3.50.0030.1524.63
4.3.40.0030.1664.54
4.3.30.0030.0183.27
4.3.20.0010.0213.25
4.3.10.0040.0163.21
4.3.00.0330.01310.37

preferences:
45.06 ms | 401 KiB | 5 Q