3v4l.org

run code in 300+ PHP versions simultaneously
<?php $regex = '(((?!a).)*)*a\\{'; $test_string = 'AAAAAAAAAAAAA{AA'; echo "1:".mb_ereg_replace($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)
8.3.60.0070.01116.88
8.3.50.0090.01122.33
8.3.40.0070.01118.96
8.3.30.0090.00919.21
8.3.20.0070.00320.47
8.3.10.0060.00323.52
8.3.00.0030.00719.51
8.2.180.0110.00716.75
8.2.170.0080.01122.96
8.2.160.0090.00920.36
8.2.150.0060.00324.18
8.2.140.0070.00324.66
8.2.130.0070.00426.16
8.2.120.0050.00522.30
8.2.110.0000.01120.71
8.2.100.0090.00617.88
8.2.90.0000.01119.20
8.2.80.0000.01117.97
8.2.70.0060.00617.73
8.2.60.0000.01118.04
8.2.50.0040.00818.07
8.2.40.0070.00418.34
8.2.30.0060.00618.06
8.2.20.0000.01017.97
8.2.10.0070.00318.15
8.2.00.0060.00917.83
8.1.280.0070.01725.92
8.1.270.0070.00322.26
8.1.260.0070.00326.35
8.1.250.0030.00628.09
8.1.240.0030.00824.09
8.1.230.0060.00917.66
8.1.220.0040.00717.80
8.1.210.0030.00918.77
8.1.200.0000.01317.48
8.1.190.0100.00017.64
8.1.180.0040.00718.10
8.1.170.0070.00418.75
8.1.160.0000.01022.21
8.1.150.0040.00719.01
8.1.140.0000.01117.63
8.1.130.0030.00617.90
8.1.120.0000.01017.71
8.1.110.0030.00717.68
8.1.100.0030.00717.59
8.1.90.0070.00317.74
8.1.80.0000.01017.77
8.1.70.0000.01017.72
8.1.60.0060.00917.85
8.1.50.0070.00417.70
8.1.40.0000.01117.79
8.1.30.0030.00917.90
8.1.20.0040.00717.96
8.1.10.0000.01417.78
8.1.00.0030.00917.79
8.0.300.0080.00318.77
8.0.290.0000.01117.13
8.0.280.0070.00418.53
8.0.270.0080.00317.28
8.0.260.0050.00517.30
8.0.250.0080.00417.19
8.0.240.0030.00617.28
8.0.230.0030.00717.32
8.0.220.0050.00517.24
8.0.210.0000.01017.27
8.0.200.0000.01117.26
8.0.190.0030.00717.30
8.0.180.0000.01017.28
8.0.170.0040.00717.16
8.0.160.0030.00717.28
8.0.150.0000.01117.22
8.0.140.0030.00717.21
8.0.130.0030.00613.62
8.0.120.0050.00517.16
8.0.110.0000.01017.18
8.0.100.0040.00717.07
8.0.90.0000.01117.35
8.0.80.0070.02117.23
8.0.70.0050.00517.03
8.0.60.0000.01016.95
8.0.50.0080.00317.02
8.0.30.0150.01417.40
8.0.20.0130.01317.40
8.0.10.0030.00717.28
8.0.00.0140.01217.08
7.4.330.0000.00915.00
7.4.320.0000.00916.89
7.4.300.0030.00616.78
7.4.290.0100.00016.93
7.4.280.0000.01216.69
7.4.270.0000.01116.79
7.4.260.0000.01016.66
7.4.250.0000.01116.61
7.4.240.0030.00816.81
7.4.230.0030.00716.79
7.4.220.0090.02216.73
7.4.210.0070.01416.76
7.4.200.0030.00616.80
7.4.190.0000.01116.70
7.4.160.0070.01416.50
7.4.150.0110.01117.40
7.4.140.0070.01617.86
7.4.130.0100.01316.78
7.4.120.0050.01716.65
7.4.110.0070.01616.86
7.4.100.0130.01016.55
7.4.90.0060.01616.69
7.4.80.0070.01719.39
7.4.70.0140.01016.73
7.4.60.0040.01816.82
7.4.50.0040.00916.93
7.4.40.0030.01722.77
7.4.30.0040.01816.89
7.4.00.0070.01415.32
7.3.330.0000.00813.41
7.3.320.0040.00413.53
7.3.310.0000.01116.41
7.3.300.0030.00716.43
7.3.290.0120.00616.51
7.3.280.0080.01716.62
7.3.270.0110.01117.40
7.3.260.0130.01016.78
7.3.250.0080.01516.81
7.3.240.0090.01216.43
7.3.230.0030.01916.39
7.3.210.0060.01616.89
7.3.200.0180.00919.39
7.3.190.0060.02216.52
7.3.180.0090.01216.77
7.3.170.0100.01316.73
7.3.160.0090.01216.50
7.3.120.0070.01315.01
7.3.10.0100.01016.81
7.3.00.0040.01116.86
7.2.330.0130.01016.86
7.2.320.0070.02216.73
7.2.310.0110.01116.75
7.2.300.0060.01616.68
7.2.290.0090.01317.02
7.2.130.0120.00616.77
7.2.120.0000.02017.07
7.2.110.0120.00617.10
7.2.100.0100.00716.91
7.2.90.0030.01216.73
7.2.80.0070.01316.93
7.2.70.0000.01517.09
7.2.60.0000.01817.16
7.2.50.0070.01017.24
7.2.40.0060.01217.20
7.2.30.0120.00617.14
7.2.20.0000.01317.20
7.2.10.0000.01817.25
7.2.00.0030.01118.29
7.1.250.0070.01416.04
7.1.200.0060.01215.85
7.1.100.0030.01418.32
7.1.70.0000.01917.06
7.1.60.0100.02219.33
7.1.50.0090.01916.88
7.1.00.0030.08322.37
7.0.200.0030.01017.02
7.0.140.0030.08021.96
7.0.60.0170.06320.04
7.0.50.0130.04717.78
7.0.40.0230.07319.98
7.0.30.0130.08319.98
7.0.20.0330.05320.11
7.0.10.0070.06320.18
7.0.00.0070.07020.03
5.6.280.0030.14021.06
5.6.210.0130.12720.47
5.6.200.0030.07718.21
5.6.190.0070.15320.70
5.6.180.0230.08020.50
5.6.170.0130.08720.51
5.6.160.0100.11320.73
5.6.150.0070.13318.11
5.6.140.0030.07718.11
5.6.130.0070.07018.19
5.6.120.0070.08721.00
5.6.110.0170.10021.04
5.6.100.0170.12321.08
5.6.90.0130.07721.01
5.6.80.0070.10320.40
5.6.70.4500.07720.36
5.5.350.0070.07320.44
5.5.340.0130.12718.00
5.5.330.0070.14320.15
5.5.320.0270.07720.31
5.5.310.0170.10020.27
5.5.300.0030.14317.98
5.5.290.0000.11718.03
5.5.280.0030.11320.76
5.5.270.0030.10720.72
5.5.260.0030.14020.80
5.5.250.0130.13720.69
5.5.240.0200.13320.36
5.4.450.0870.10319.44
5.4.440.0630.11719.57
5.4.430.0670.10319.56
5.4.420.0170.12319.26
5.4.410.0900.09719.16
5.4.400.0670.10719.34
5.4.390.0500.13019.24
5.4.380.0130.11718.80
5.4.370.0330.10318.64
5.4.360.0230.10318.51
5.4.350.0230.13018.60
5.4.340.0270.10018.59
5.4.320.0030.08712.48
5.4.310.0040.08112.48
5.4.300.0100.07512.49
5.4.290.0080.07412.48
5.4.280.0110.09612.36
5.4.270.0180.12812.36
5.4.260.0110.09912.36
5.4.250.0100.10512.36
5.4.240.0100.10612.36
5.4.230.0180.18812.35
5.4.220.0110.12412.36
5.4.210.0140.12112.35
5.4.200.0090.12612.35
5.4.190.0140.15912.35
5.4.180.0170.14412.35
5.4.170.0080.15112.36
5.4.160.0100.11512.35
5.4.150.0050.09412.35
5.4.140.0060.08712.03
5.4.130.0140.16312.02
5.4.120.0100.12012.00
5.4.110.0110.13211.99
5.4.100.0170.16212.00
5.4.90.0130.09811.99
5.4.80.0140.12612.00
5.4.70.0060.13012.00
5.4.60.0090.11512.00
5.4.50.0140.12511.99
5.4.40.0120.11211.98
5.4.30.0090.11711.98
5.4.20.0090.13411.98
5.4.10.0110.14311.98
5.4.00.0230.13211.46
5.3.290.0030.07712.80
5.3.280.0130.16812.71
5.3.270.0070.13012.72
5.3.260.0280.15412.72
5.3.250.0230.19412.72
5.3.240.0200.14112.72
5.3.230.0270.14712.71
5.3.220.0220.14412.68
5.3.210.0370.22512.68
5.3.200.0190.15012.68
5.3.190.0150.12512.68
5.3.180.0070.12712.67
5.3.170.0060.13312.67
5.3.160.0140.12912.67
5.3.150.0100.13312.67
5.3.140.0140.15212.66
5.3.130.0250.18012.66
5.3.120.0110.12712.66
5.3.110.0120.09212.66
5.3.100.0110.11712.12
5.3.90.0200.12612.08
5.3.80.0200.12912.08
5.3.70.0170.12912.07
5.3.60.0120.08212.06
5.3.50.0140.04612.00
5.3.40.0100.05912.00
5.3.30.0200.08811.96
5.3.20.0140.09911.75
5.3.10.0140.07211.71
5.3.00.0100.06711.70
5.2.170.0050.0419.19
5.2.160.0150.0819.19
5.2.150.0150.0739.19
5.2.140.0160.0859.18
5.2.130.0130.0649.14
5.2.120.0180.0619.15
5.2.110.0100.0449.15
5.2.100.0110.0539.15
5.2.90.0070.0689.15
5.2.80.0320.0799.14
5.2.70.0210.1009.14
5.2.60.0070.0569.10
5.2.50.0060.0559.07
5.2.40.0110.0489.07
5.2.30.0190.07516.91
5.2.20.0150.04816.90
5.2.10.0140.0678.94
5.2.00.0150.0738.80
5.1.60.0160.1668.09
5.1.50.0150.1538.10
5.1.40.0060.0848.08
5.1.30.0260.1368.43
5.1.20.0160.1318.45
5.1.10.0100.0808.17
5.1.00.0060.0708.17
5.0.50.0080.0966.64
5.0.40.0070.0876.50
5.0.30.0150.1296.32
5.0.20.0130.0916.29
5.0.10.0160.1726.26
5.0.00.0110.1586.25
4.4.90.0120.1154.77
4.4.80.0390.04812.56
4.4.70.0220.03112.55
4.4.60.0080.02212.56
4.4.50.0050.0584.77
4.4.40.0020.0744.71
4.4.30.0080.0574.76
4.4.20.0050.0594.84
4.4.10.0040.0954.85
4.4.00.0050.0664.76
4.3.110.0040.0534.67
4.3.100.0040.0614.66
4.3.90.0310.0924.64
4.3.80.0040.0674.59
4.3.70.0040.0544.63
4.3.60.0040.0534.63
4.3.50.0010.0734.62
4.3.40.0050.0924.54
4.3.30.0050.0253.27
4.3.20.0060.0233.25
4.3.10.0060.0263.21
4.3.00.0000.03710.30

preferences:
38.71 ms | 401 KiB | 5 Q