3v4l.org

run code in 300+ PHP versions simultaneously
<?php $regex = '(((?!a).)*)*a\\{'; $test_string = 'AAAAAAAAAAAAAA{AA'; echo "1:".var_dump(mb_ereg_replace($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)
8.3.60.0130.01317.00
8.3.50.0120.01922.12
8.3.40.0160.01019.09
8.3.30.0120.01519.27
8.3.20.0070.00420.28
8.3.10.0000.01123.41
8.3.00.0080.00419.50
8.2.180.0130.01018.73
8.2.170.0110.01122.96
8.2.160.0200.01020.39
8.2.150.0040.00824.18
8.2.140.0070.00424.66
8.2.130.0000.01126.16
8.2.120.0000.01122.33
8.2.110.0070.00721.04
8.2.100.0120.00617.97
8.2.90.0090.00619.20
8.2.80.0070.00717.97
8.2.70.0060.00917.75
8.2.60.0000.01517.93
8.2.50.0000.01418.10
8.2.40.0040.01520.73
8.2.30.0000.01418.09
8.2.20.0030.01117.84
8.2.10.0070.00718.14
8.2.00.0040.01117.97
8.1.280.0060.01625.92
8.1.270.0060.00624.00
8.1.260.0060.00626.35
8.1.250.0050.00528.09
8.1.240.0070.00722.19
8.1.230.0070.01117.83
8.1.220.0060.00917.74
8.1.210.0090.00618.77
8.1.200.0030.01217.48
8.1.190.0070.00717.48
8.1.180.0030.01018.10
8.1.170.0080.00818.97
8.1.160.0060.00922.13
8.1.150.0000.01418.91
8.1.140.0070.00717.60
8.1.130.0030.01017.91
8.1.120.0000.01317.67
8.1.110.0070.00717.64
8.1.100.0030.01017.77
8.1.90.0030.01017.77
8.1.80.0000.01417.61
8.1.70.0000.01317.69
8.1.60.0060.00917.83
8.1.50.0040.01117.82
8.1.40.0000.01417.83
8.1.30.0090.00617.94
8.1.20.0000.01417.85
8.1.10.0030.01017.83
8.1.00.0030.01017.75
8.0.300.0090.00618.77
8.0.290.0060.00916.88
8.0.280.0000.01418.60
8.0.270.0000.01317.36
8.0.260.0070.00718.67
8.0.250.0000.01317.33
8.0.240.0060.00917.28
8.0.230.0030.01017.19
8.0.220.0060.00617.27
8.0.210.0030.01017.22
8.0.200.0060.00617.25
8.0.190.0070.00717.17
8.0.180.0030.01017.19
8.0.170.0040.01117.21
8.0.160.0000.01317.17
8.0.150.0000.01317.21
8.0.140.0060.00917.20
8.0.130.0040.00813.65
8.0.120.0030.01017.23
8.0.110.0040.01017.07
8.0.100.0070.00717.25
8.0.90.0030.01017.11
8.0.80.0070.01717.28
8.0.70.0030.01217.03
8.0.60.0030.01017.04
8.0.50.0000.01417.14
8.0.30.0110.02317.29
8.0.20.0130.01517.46
8.0.10.0000.01417.13
8.0.00.0080.01916.93
7.4.330.0000.01115.20
7.4.320.0030.00916.89
7.4.300.0060.00616.89
7.4.290.0080.00516.69
7.4.280.0030.01016.79
7.4.270.0040.01116.84
7.4.260.0070.00716.72
7.4.250.0000.01416.82
7.4.240.0030.01016.70
7.4.230.0030.01016.83
7.4.220.0130.01616.73
7.4.210.0050.02216.76
7.4.200.0000.01316.76
7.4.190.0030.01016.85
7.4.160.0090.01616.88
7.4.150.0070.02017.40
7.4.140.0130.01917.86
7.4.130.0060.02316.71
7.4.120.0100.02216.84
7.4.110.0100.01716.63
7.4.100.0110.01816.83
7.4.90.0120.01916.73
7.4.80.0070.02419.39
7.4.70.0100.01716.57
7.4.60.0100.01616.79
7.4.50.0030.01416.81
7.4.40.0090.01222.77
7.4.30.0070.02116.63
7.4.00.0080.01815.05
7.3.330.0040.00713.36
7.3.320.0000.01313.39
7.3.310.0030.01016.55
7.3.300.0070.00716.60
7.3.290.0150.01916.61
7.3.280.0070.02116.51
7.3.270.0000.02817.40
7.3.260.0140.01416.82
7.3.250.0170.02316.72
7.3.240.0150.02116.50
7.3.230.0030.02416.48
7.3.210.0030.02316.68
7.3.200.0090.02219.39
7.3.190.0030.02616.46
7.3.180.0070.01716.61
7.3.170.0070.02016.60
7.3.160.0110.01516.69
7.3.120.0080.01815.24
7.3.110.0040.02515.05
7.3.100.0100.01414.73
7.3.90.0030.02115.18
7.3.80.0070.01614.84
7.3.70.0110.01114.98
7.3.60.0060.01615.02
7.3.50.0100.01315.16
7.3.40.0030.01215.07
7.3.30.0070.01615.16
7.3.20.0060.01816.76
7.3.10.0030.02016.97
7.3.00.0030.02216.54
7.2.330.0090.01916.84
7.2.320.0090.01917.00
7.2.310.0110.01816.87
7.2.300.0090.01916.81
7.2.290.0060.02116.72
7.2.250.0030.02415.21
7.2.240.0100.02015.21
7.2.230.0070.01715.19
7.2.220.0100.01015.33
7.2.210.0030.01715.00
7.2.200.0030.01415.00
7.2.190.0090.01915.28
7.2.180.0030.01615.34
7.2.170.0090.00915.12
7.2.80.0070.01316.75
7.2.60.0000.02016.87
7.2.00.0150.01519.65
7.1.330.0000.02115.83
7.1.320.0060.00915.75
7.1.310.0090.01215.98
7.1.300.0060.02115.95
7.1.290.0030.01515.82
7.1.280.0030.01415.80
7.1.270.0030.01916.11
7.1.260.0070.01816.04
7.1.200.0130.00716.01
7.1.100.0030.01418.04
7.1.70.0000.02717.40
7.1.60.0140.02419.33
7.1.50.0100.02317.23
7.1.00.0030.08022.30
7.0.200.0720.00914.80
7.0.140.0070.08022.07
7.0.120.0200.08321.95
7.0.110.0100.04322.09
7.0.100.0000.05321.95
7.0.90.0000.05322.14
7.0.80.0170.07021.98
7.0.70.0130.05021.96
7.0.60.0070.05022.04
7.0.50.0030.08721.94
7.0.40.0030.09019.93
7.0.30.0030.04320.02
7.0.20.0070.08019.92
7.0.10.0030.09019.96
7.0.00.0030.07020.05
5.6.280.0100.15720.80
5.6.270.0030.11320.75
5.6.260.0170.10720.81
5.6.250.0070.08020.82
5.6.240.0100.12721.02
5.6.230.0070.07321.04
5.6.220.0100.06321.00
5.6.210.0030.09020.61
5.6.200.0000.07020.95
5.6.190.0030.08720.95
5.6.180.0030.07020.77
5.6.170.0070.11020.77
5.6.160.0000.09020.87
5.6.150.0070.11320.97
5.6.140.0170.06020.77
5.6.130.0030.08721.00
5.6.120.0000.06320.77
5.6.110.0070.10020.68
5.6.100.0030.11721.01
5.6.90.0030.12720.93
5.6.80.0070.12020.39
5.6.70.0030.09320.14
5.6.60.0030.07020.30
5.6.50.0000.07020.23
5.6.40.0070.14720.09
5.6.30.0000.11320.36
5.6.20.0030.14020.05
5.6.10.0000.15020.24
5.6.00.0070.09320.11
5.5.380.0030.06717.63
5.5.370.0000.07717.61
5.5.360.0070.10017.45
5.5.350.0170.10317.60
5.5.340.0000.07318.13
5.5.330.0070.14018.18
5.5.320.0130.10718.13
5.5.310.0000.11717.80
5.5.300.0000.07017.87
5.5.290.0030.07018.28
5.5.280.0000.07018.16
5.5.270.0000.07718.03
5.5.260.0070.08318.11
5.5.250.0030.11717.60
5.5.240.0070.11717.66
5.5.230.0030.06317.57
5.5.220.0000.06717.50
5.5.210.0070.06317.41
5.5.200.0030.11017.51
5.5.190.0000.09717.16
5.5.180.0000.10017.51
5.5.160.0070.09017.24
5.5.150.0070.09717.40
5.5.140.0070.10317.21
5.5.130.0100.12317.53
5.5.120.0100.11317.49
5.5.110.0070.08317.23
5.5.100.0070.12317.41
5.5.90.0030.08017.39
5.5.80.0100.08717.53
5.5.70.0070.11717.13
5.5.60.0030.10017.45
5.5.50.0100.11717.11
5.5.40.0070.10017.03
5.5.30.0170.08317.41
5.5.20.0030.13317.43
5.5.10.0130.10717.40
5.5.00.0030.11717.38
5.4.450.0000.06319.28
5.4.440.0070.06019.46
5.4.430.0000.06719.39
5.4.420.0000.06319.27
5.4.410.0070.09719.30
5.4.400.0000.09719.24
5.4.390.0000.07319.05
5.4.380.0030.07319.01
5.4.370.0070.09719.16
5.4.360.0000.11719.00
5.4.350.0130.07319.15
5.4.340.0130.08019.15
5.4.320.0030.07719.15
5.4.310.0070.11019.07
5.4.300.0000.06319.09
5.4.290.0170.09019.00
5.4.280.0030.10318.88
5.4.270.0030.10019.25
5.4.260.0000.08318.88
5.4.250.0070.05718.92
5.4.240.0000.09319.07
5.4.230.0130.09018.97
5.4.220.0070.10319.14
5.4.210.0100.08019.14
5.4.200.0070.07719.24
5.4.190.0030.12319.09
5.4.180.0000.08018.89
5.4.170.0070.07718.99
5.4.160.0030.11018.96
5.4.150.0070.10319.05
5.4.140.0030.15016.51
5.4.130.0100.05316.25
5.4.120.0070.09016.36
5.4.110.0070.07716.40
5.4.100.0030.11016.21
5.4.90.0030.09316.52
5.4.80.0000.09716.24
5.4.70.0070.07316.53
5.4.60.0130.09716.48
5.4.50.0100.08016.34
5.4.40.0070.09316.13
5.4.30.0000.06716.43
5.4.20.0030.11316.46
5.4.10.0070.09316.43
5.4.00.0030.06315.88
5.3.290.0030.10714.71
5.3.280.0070.06314.71
5.3.270.0030.11314.46
5.3.260.0070.08314.53
5.3.250.0030.11714.52
5.3.240.0100.07314.52
5.3.230.0030.09714.45
5.3.220.0000.09314.63
5.3.210.0030.10314.43
5.3.200.0030.06714.50
5.3.190.0130.07014.71
5.3.180.0070.09314.53
5.3.170.0070.11314.50
5.3.160.0030.08014.55
5.3.150.0030.06714.60
5.3.140.0000.06314.66
5.3.130.0070.06014.54
5.3.120.0030.10014.59
5.3.110.0030.10314.52
5.3.100.0130.08313.91
5.3.90.0000.06713.84
5.3.80.0000.05714.14
5.3.70.0030.05713.91
5.3.60.0000.04014.04
5.3.50.0070.04013.91
5.3.40.0070.07013.83
5.3.30.0000.06013.88
5.3.20.0000.08013.64
5.3.10.0070.03013.78
5.3.00.0070.04013.55
5.2.170.0000.03311.94
5.2.160.0030.03011.94
5.2.150.0000.06311.94
5.2.140.0030.06311.94
5.2.130.0070.02311.94
5.2.120.0000.04311.94
5.2.110.0000.03011.94
5.2.100.0070.05311.94
5.2.90.0070.05711.94
5.2.80.0030.07711.94
5.2.70.0030.06311.94
5.2.60.0000.04011.94
5.2.50.0030.02711.94
5.2.40.0000.03011.94
5.2.30.0070.04018.60
5.2.20.0100.06018.68
5.2.10.0000.05711.94
5.2.00.0000.06311.94
5.1.60.0000.14711.94
5.1.50.0000.09311.94
5.1.40.0000.09711.94
5.1.30.0000.08711.94
5.1.20.0000.08711.94
5.1.10.0170.11011.94
5.1.00.0000.12011.94
5.0.50.0000.08011.94
5.0.40.0000.07011.94
5.0.30.0000.08711.94
5.0.20.0000.08311.94
5.0.10.0000.06011.94
5.0.00.0030.07711.94
4.4.90.0000.10311.94
4.4.80.0000.04713.72
4.4.70.0070.03313.79
4.4.60.0030.01313.68
4.4.50.0000.13311.94
4.4.40.0100.07011.94
4.4.30.0030.07311.94
4.4.20.0070.08711.94
4.4.10.0000.09011.94
4.4.00.0000.08311.94
4.3.110.0000.07011.94
4.3.100.0030.06311.94
4.3.90.0030.06311.94
4.3.80.0000.07011.94
4.3.70.0000.05311.94
4.3.60.0030.05311.94
4.3.50.0000.06711.94
4.3.40.0000.06311.94
4.3.30.0030.01011.94
4.3.20.0000.01711.94
4.3.10.0000.01311.94
4.3.00.0000.01311.94

preferences:
36.51 ms | 401 KiB | 5 Q