3v4l.org

run code in 300+ PHP versions simultaneously
<?php $regex = '(((?!a).)*)*a\\{'; $test_string = 'AAAAAAAAAAAAAA{A'; echo "1:".mb_ereg_replace($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)
8.3.60.0140.00316.88
8.3.50.0120.01222.21
8.3.40.0090.00919.04
8.3.30.0070.02019.08
8.3.20.0090.00020.34
8.3.10.0000.01023.83
8.3.00.0070.00419.50
8.2.180.0000.01816.48
8.2.170.0110.00722.96
8.2.160.0100.00720.39
8.2.150.0000.00924.18
8.2.140.0050.00524.66
8.2.130.0060.01026.16
8.2.120.0030.00622.33
8.2.110.0060.00621.31
8.2.100.0090.00618.03
8.2.90.0040.00719.05
8.2.80.0060.00617.97
8.2.70.0000.01117.75
8.2.60.0040.00718.05
8.2.50.0080.00318.10
8.2.40.0030.01020.60
8.2.30.0000.01218.14
8.2.20.0040.00818.01
8.2.10.0000.01018.03
8.2.00.0000.01117.96
8.1.280.0090.00925.92
8.1.270.0070.00323.94
8.1.260.0060.00326.35
8.1.250.0090.00028.09
8.1.240.0090.00919.57
8.1.230.0030.01017.64
8.1.220.0000.01117.74
8.1.210.0000.01118.77
8.1.200.0080.00417.47
8.1.190.0040.00717.36
8.1.180.0000.01218.10
8.1.170.0000.01218.71
8.1.160.0030.00922.22
8.1.150.0040.00718.79
8.1.140.0060.00617.78
8.1.130.0000.01017.96
8.1.120.0030.00717.72
8.1.110.0000.01017.70
8.1.100.0000.01117.64
8.1.90.0030.00817.74
8.1.80.0060.00317.74
8.1.70.0030.00717.68
8.1.60.0040.00717.86
8.1.50.0040.00717.72
8.1.40.0040.00817.72
8.1.30.0070.00717.93
8.1.20.0050.00517.79
8.1.10.0070.00417.73
8.1.00.0040.00717.62
8.0.300.0030.00819.09
8.0.290.0080.00317.00
8.0.280.0050.00518.56
8.0.270.0000.01017.36
8.0.260.0030.00617.32
8.0.250.0080.00317.30
8.0.240.0080.00417.31
8.0.230.0070.00417.19
8.0.220.0080.00317.15
8.0.210.0050.00517.19
8.0.200.0000.01017.34
8.0.190.0030.00717.26
8.0.180.0000.01417.15
8.0.170.0090.00317.16
8.0.160.0000.01017.20
8.0.150.0030.00717.15
8.0.140.0000.01117.09
8.0.130.0000.00913.65
8.0.120.0030.00917.19
8.0.110.0040.00717.10
8.0.100.0000.01017.13
8.0.90.0040.00717.32
8.0.80.0090.00917.29
8.0.70.0040.00717.29
8.0.60.0040.00817.04
8.0.50.0040.00716.95
8.0.30.0110.01217.34
8.0.20.0140.01117.42
8.0.10.0040.00716.93
8.0.00.0150.01217.14
7.4.330.0000.00815.00
7.4.320.0000.01116.79
7.4.300.0030.00616.89
7.4.290.0000.01016.89
7.4.280.0070.00416.79
7.4.270.0000.01016.76
7.4.260.0000.01116.65
7.4.250.0030.00716.86
7.4.240.0020.00816.79
7.4.230.0070.00316.70
7.4.220.0000.02516.75
7.4.210.0060.01616.90
7.4.200.0040.00716.79
7.4.190.0080.00416.83
7.4.160.0040.01516.67
7.4.150.0130.01017.40
7.4.140.0140.01617.86
7.4.130.0030.01916.88
7.4.120.0100.01216.79
7.4.110.0070.01716.56
7.4.100.0090.01716.70
7.4.90.0180.00316.53
7.4.80.0100.02019.39
7.4.70.0120.00916.75
7.4.60.0120.00916.55
7.4.50.0030.00916.70
7.4.40.0060.01322.77
7.4.30.0000.02116.68
7.4.00.0130.00915.29
7.3.330.0050.00513.44
7.3.320.0000.00913.39
7.3.310.0070.00416.69
7.3.300.0040.00716.54
7.3.290.0030.01916.60
7.3.280.0090.01416.54
7.3.270.0130.01017.40
7.3.260.0090.01316.71
7.3.250.0130.01316.78
7.3.240.0150.01216.50
7.3.230.0120.00916.76
7.3.210.0100.01316.47
7.3.200.0130.01619.39
7.3.190.0100.01316.46
7.3.180.0060.01516.45
7.3.170.0030.01716.63
7.3.160.0030.01716.39
7.3.120.0070.01015.20
7.3.110.0090.01415.16
7.3.100.0090.01115.04
7.3.90.0100.01315.10
7.3.80.0030.01515.15
7.3.70.0060.00914.93
7.3.60.0030.01314.93
7.3.50.0060.01115.06
7.3.40.0140.00614.79
7.3.30.0020.01314.94
7.3.20.0090.00916.71
7.3.10.0050.01216.67
7.3.00.0070.01216.77
7.2.330.0170.00716.71
7.2.320.0000.02116.70
7.2.310.0030.01716.79
7.2.300.0180.00416.83
7.2.290.0080.01416.79
7.2.250.0080.01515.11
7.2.240.0090.01115.28
7.2.230.0100.01315.14
7.2.220.0120.01015.08
7.2.210.0080.01215.40
7.2.200.0030.01215.29
7.2.190.0050.01215.00
7.2.180.0060.01515.24
7.2.170.0060.01315.23
7.2.160.0070.01315.13
7.2.150.0030.01416.93
7.2.140.0120.00317.10
7.2.130.0090.00917.18
7.2.120.0060.01217.11
7.2.110.0100.01017.07
7.2.100.0040.01117.07
7.2.90.0030.01017.14
7.2.80.0060.00917.06
7.2.70.0030.01616.96
7.2.60.0050.01017.07
7.2.50.0100.01016.86
7.2.40.0000.01617.10
7.2.30.0080.00616.98
7.2.20.0040.00816.93
7.2.10.0060.00917.19
7.2.00.0060.00918.31
7.1.330.0050.01215.87
7.1.320.0030.01415.89
7.1.310.0050.01315.86
7.1.300.0050.01015.89
7.1.290.0060.00816.08
7.1.280.0030.01315.90
7.1.270.0050.01216.04
7.1.260.0070.00715.91
7.1.250.0030.01315.96
7.1.200.0030.01416.05
7.1.100.0070.01018.08
7.1.70.0080.00617.23
7.1.60.0070.02319.33
7.1.50.0070.01816.90
7.1.00.0030.08322.45
7.0.200.0470.01014.89
7.0.140.0130.07022.08
7.0.60.0030.05719.91
7.0.50.0070.08317.82
7.0.40.0100.09320.06
7.0.30.0200.05020.22
7.0.20.0270.05320.20
7.0.10.0030.07020.05
7.0.00.0100.08720.05
5.6.280.0030.14321.09
5.6.210.0100.13020.55
5.6.200.0130.12718.15
5.6.190.0030.09720.43
5.6.180.0100.07720.42
5.6.170.0370.12020.43
5.6.160.0100.12320.56
5.6.150.0070.12718.21
5.6.140.0070.12018.15
5.6.130.0070.13318.20
5.6.120.0070.13021.14
5.6.110.0070.12020.97
5.6.100.0130.12320.98
5.6.90.0170.09020.96
5.6.80.0370.10320.53
5.6.70.4600.07320.50
5.5.350.0070.12320.32
5.5.340.0130.12718.04
5.5.330.0000.14020.28
5.5.320.0030.13720.20
5.5.310.0400.11720.19
5.5.300.0030.09318.00
5.5.290.0100.11018.05
5.5.280.0000.13720.76
5.5.270.0170.06720.84
5.5.260.0100.13320.89
5.5.250.0030.08320.78
5.5.240.0200.07720.27
5.4.450.0800.11019.57
5.4.440.0730.12019.52
5.4.430.0800.10719.43
5.4.420.0730.10719.59
5.4.410.0870.10319.04
5.4.400.0930.14319.34
5.4.390.0830.10319.04
5.4.380.0470.09318.59
5.4.370.0330.11018.53
5.4.360.0230.11718.59
5.4.350.0470.12018.75
5.4.340.0230.10718.73
5.4.320.0070.07512.48
5.4.310.0090.07712.48
5.4.300.0050.07412.48
5.4.290.0060.08712.48
5.4.280.0130.08112.36
5.4.270.0080.14212.36
5.4.260.0080.11212.36
5.4.250.0100.09212.36
5.4.240.0100.09912.36
5.4.230.0110.09412.36
5.4.220.0060.13212.36
5.4.210.0080.12712.35
5.4.200.0100.16512.35
5.4.190.0090.12212.35
5.4.180.0070.12112.35
5.4.170.0050.08512.36
5.4.160.0090.11712.35
5.4.150.0110.10612.35
5.4.140.0090.08012.04
5.4.130.0080.08212.02
5.4.120.0080.07012.00
5.4.110.0090.08212.00
5.4.100.0080.10912.00
5.4.90.0090.09611.99
5.4.80.0100.07912.00
5.4.70.0050.07311.99
5.4.60.0080.07711.99
5.4.50.0090.07611.99
5.4.40.0040.07111.98
5.4.30.0070.08211.98
5.4.20.0070.07911.98
5.4.10.0090.07211.98
5.4.00.0060.07811.46
5.3.290.0070.07812.80
5.3.280.0050.09012.71
5.3.270.0070.08112.72
5.3.260.0080.08112.71
5.3.250.0090.07812.72
5.3.240.0090.08512.72
5.3.230.0080.08612.71
5.3.220.0080.08112.68
5.3.210.0090.07112.68
5.3.200.0060.07612.68
5.3.190.0100.10012.68
5.3.180.0130.08812.68
5.3.170.0100.07912.66
5.3.160.0080.08112.68
5.3.150.0090.10912.67
5.3.140.0070.08812.66
5.3.130.0050.08312.66
5.3.120.0120.11212.66
5.3.110.0060.08212.65
5.3.100.0080.07712.12
5.3.90.0060.09812.08
5.3.80.0120.11712.08
5.3.70.0090.09712.07
5.3.60.0040.04712.07
5.3.50.0080.04312.00
5.3.40.0080.05912.00
5.3.30.0150.05711.96
5.3.20.0060.06411.75
5.3.10.0150.05511.70
5.3.00.0150.05611.70
5.2.170.0070.0519.19
5.2.160.0090.0479.19
5.2.150.0070.0499.19
5.2.140.0090.0509.19
5.2.130.0100.0399.15
5.2.120.0060.0339.14
5.2.110.0030.0369.14
5.2.100.0070.0409.15
5.2.90.0050.0339.14
5.2.80.0060.0339.14
5.2.70.0050.0339.14
5.2.60.0050.0369.11
5.2.50.0070.0329.07
5.2.40.0030.0339.06
5.2.30.0100.03216.91
5.2.20.0100.02816.90
5.2.10.0060.0308.93
5.2.00.0080.0318.80
5.1.60.0080.0638.09
5.1.50.0040.0668.09
5.1.40.0060.0648.07
5.1.30.0010.0728.43
5.1.20.0050.0688.45
5.1.10.0070.0658.17
5.1.00.0040.0668.17
5.0.50.0030.0626.64
5.0.40.0040.0566.50
5.0.30.0030.0686.31
5.0.20.0050.0566.29
5.0.10.0040.0766.26
5.0.00.0020.0776.25
4.4.90.0030.0564.78
4.4.80.0120.01912.55
4.4.70.0080.02312.55
4.4.60.0100.02112.56
4.4.50.0080.0604.77
4.4.40.0040.0684.71
4.4.30.0020.0584.76
4.4.20.0050.0544.85
4.4.10.0040.0554.85
4.4.00.0070.0934.76
4.3.110.0050.0684.67
4.3.100.0060.0744.67
4.3.90.0040.0584.63
4.3.80.0080.0814.58
4.3.70.0020.0534.63
4.3.60.0010.0534.63
4.3.50.0030.0754.63
4.3.40.0040.0704.53
4.3.30.0040.0153.27
4.3.20.0010.0173.25
4.3.10.0030.0153.22
4.3.00.0030.01710.37

preferences:
44.71 ms | 401 KiB | 5 Q