3v4l.org

run code in 300+ PHP versions simultaneously
<?php $regex = '/(((?!a).)*)*a\\{/u'; $test_string = 'AAAAAAAAAAAAAA{AA'; echo mb_ereg_replace($regex,'WORKED',$test_string); echo "\n"; var_dump(preg_match($regex,$test_string));

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)
8.3.60.0150.00916.63
8.3.50.0120.01122.27
8.3.40.0140.01718.90
8.3.30.0030.01419.17
8.3.20.0090.00020.41
8.3.10.0060.00323.70
8.3.00.0030.00619.50
8.2.180.0070.01518.54
8.2.170.0150.00622.96
8.2.160.0120.00620.35
8.2.150.0060.00324.18
8.2.140.0100.00024.66
8.2.130.0060.00326.16
8.2.120.0030.00622.42
8.2.110.0060.00622.55
8.2.100.0040.01117.97
8.2.90.0090.00319.34
8.2.80.0060.00617.97
8.2.70.0090.00317.63
8.2.60.0080.00317.93
8.2.50.0030.00818.07
8.2.40.0030.00918.03
8.2.30.0030.00718.09
8.2.20.0040.00717.82
8.2.10.0040.00717.94
8.2.00.0030.00917.89
8.1.280.0040.01425.92
8.1.270.0030.00722.19
8.1.260.0090.00326.35
8.1.250.0030.00728.09
8.1.240.0040.00723.79
8.1.230.0120.00619.22
8.1.220.0040.00717.74
8.1.210.0040.00818.77
8.1.200.0060.00617.35
8.1.190.0030.00917.63
8.1.180.0040.01118.10
8.1.170.0060.00618.71
8.1.160.0030.00722.13
8.1.150.0080.00418.83
8.1.140.0030.00817.54
8.1.130.0000.01117.87
8.1.120.0030.00717.71
8.1.110.0000.01017.61
8.1.100.0000.01017.67
8.1.90.0000.01017.66
8.1.80.0030.00817.59
8.1.70.0040.00717.57
8.1.60.0000.01117.80
8.1.50.0060.00617.71
8.1.40.0060.00617.67
8.1.30.0060.00617.88
8.1.20.0080.00317.91
8.1.10.0000.01117.79
8.1.00.0000.01117.69
8.0.300.0030.00718.77
8.0.290.0060.00617.30
8.0.280.0030.00718.50
8.0.270.0070.00317.34
8.0.260.0050.00517.41
8.0.250.0000.01017.19
8.0.240.0030.00917.24
8.0.230.0040.00717.14
8.0.220.0030.00717.13
8.0.210.0080.00317.18
8.0.200.0000.01117.16
8.0.190.0000.01117.20
8.0.180.0030.00717.17
8.0.170.0040.00817.19
8.0.160.0000.01017.01
8.0.150.0030.00716.99
8.0.140.0030.00717.01
8.0.130.0030.00613.63
8.0.120.0000.01117.12
8.0.110.0060.00617.20
8.0.100.0040.00717.23
8.0.90.0070.00417.02
8.0.80.0130.01617.28
8.0.70.0030.00917.04
8.0.60.0000.01017.04
8.0.50.0070.00417.31
8.0.30.0140.01017.16
8.0.20.0120.01217.46
8.0.10.0080.00317.16
8.0.00.0160.01117.01
7.4.330.0000.00815.14
7.4.320.0030.00616.86
7.4.300.0040.00816.86
7.4.290.0000.01116.78
7.4.280.0030.00716.69
7.4.270.0060.00616.94
7.4.260.0000.01116.90
7.4.250.0000.01116.82
7.4.240.0050.00516.75
7.4.230.0000.01016.68
7.4.220.0030.02116.91
7.4.210.0040.01716.79
7.4.200.0030.00816.88
7.4.190.0000.01017.04
7.4.160.0160.00516.62
7.4.150.0070.01717.40
7.4.140.0130.01617.86
7.4.130.0110.01116.81
7.4.120.0090.01316.73
7.4.110.0090.01616.66
7.4.100.0120.01216.71
7.4.90.0070.01516.86
7.4.80.0060.01619.39
7.4.70.0160.00616.83
7.4.60.0070.01516.77
7.4.50.0030.01016.45
7.4.40.0070.01022.77
7.4.30.0120.01216.68
7.4.00.0080.01315.13
7.3.330.0040.00413.33
7.3.320.0030.00513.16
7.3.310.0100.00316.49
7.3.300.0030.00616.45
7.3.290.0100.01016.39
7.3.280.0080.01416.41
7.3.270.0100.01317.40
7.3.260.0070.01716.48
7.3.250.0090.01716.39
7.3.240.0110.01416.39
7.3.230.0060.01616.70
7.3.210.0040.01816.57
7.3.200.0090.02219.39
7.3.190.0060.01916.73
7.3.180.0130.00916.47
7.3.170.0090.01316.57
7.3.160.0110.01116.41
7.3.120.0070.01315.06
7.3.110.0060.01815.17
7.3.100.0040.01715.20
7.3.90.0100.01415.08
7.3.80.0090.00915.11
7.3.70.0060.00914.63
7.3.60.0030.01314.96
7.3.50.0100.00714.60
7.3.40.0030.01614.94
7.3.30.0040.01514.89
7.3.20.0060.00916.88
7.3.10.0080.00616.67
7.3.00.0100.00716.76
7.2.330.0090.01616.55
7.2.320.0130.00916.77
7.2.310.0120.00916.66
7.2.300.0120.00916.66
7.2.290.0070.01416.64
7.2.250.0030.02015.03
7.2.240.0040.02215.16
7.2.230.0070.01315.22
7.2.220.0030.02014.82
7.2.210.0070.01415.18
7.2.200.0100.00614.95
7.2.190.0100.01015.11
7.2.180.0140.01015.25
7.2.170.0030.01715.04
7.2.60.0000.01916.87
7.2.00.0070.01319.59
7.1.330.0120.00616.08
7.1.320.0070.01415.97
7.1.310.0090.00915.88
7.1.300.0130.01016.18
7.1.290.0060.01215.95
7.1.280.0060.00915.89
7.1.270.0070.01016.05
7.1.260.0140.00715.73
7.1.200.0060.01315.75
7.1.100.0070.01018.47
7.1.70.0050.00517.25
7.1.60.0070.02419.33
7.1.50.0070.02317.16
7.1.00.0070.08022.43
7.0.200.0190.00914.88
7.0.140.0070.07722.15
7.0.60.0100.04319.92
7.0.50.0070.06317.89
7.0.40.0100.06020.06
7.0.30.0470.07720.22
7.0.20.0100.05020.04
7.0.10.0070.08320.05
7.0.00.0000.05020.20
5.6.280.0130.08721.07
5.6.210.0000.05720.46
5.6.200.0070.11718.23
5.6.190.0100.05320.59
5.6.180.0300.07720.44
5.6.170.0330.05020.51
5.6.160.0030.06020.43
5.6.150.0130.10018.21
5.6.140.0030.05318.23
5.6.130.0070.09318.14
5.6.120.0070.08721.00
5.6.110.0100.10020.97
5.6.100.0130.09020.97
5.6.90.0000.05721.12
5.6.80.0030.08020.50
5.6.70.4170.05320.24
5.5.350.0170.09320.40
5.5.340.0100.09718.01
5.5.330.0170.10020.49
5.5.320.0000.11020.35
5.5.310.0300.10020.35
5.5.300.0000.06717.94
5.5.290.0130.09018.04
5.5.280.0030.08020.96
5.5.270.0030.12020.79
5.5.260.0130.07320.86
5.5.250.0070.08020.68
5.5.240.0200.05320.15
5.4.450.0830.06719.26
5.4.440.0230.08019.66
5.4.430.0170.08319.43
5.4.420.0100.08719.29
5.4.410.0230.07019.34
5.4.400.0130.08719.35
5.4.390.0330.06319.30
5.4.380.0330.07318.59
5.4.370.0170.08018.76
5.4.360.0270.06718.49
5.4.350.0370.06318.62
5.4.340.0300.06318.51
5.4.320.0070.05212.48
5.4.310.0070.05412.48
5.4.300.0060.05112.48
5.4.290.0040.05412.48
5.4.280.0080.05512.36
5.4.270.0090.05412.36
5.4.260.0080.06012.36
5.4.250.0060.06312.36
5.4.240.0110.05612.36
5.4.230.0050.05912.35
5.4.220.0140.05112.35
5.4.210.0140.11212.35
5.4.200.0120.11012.35
5.4.190.0060.06512.35
5.4.180.0120.06612.35
5.4.170.0050.05812.35
5.4.160.0050.05812.35
5.4.150.0070.05812.35
5.4.140.0310.14112.03
5.4.130.0140.09212.02
5.4.120.0110.10111.99
5.4.110.0090.05512.00
5.4.100.0120.08911.99
5.4.90.0300.08412.00
5.4.80.0380.11411.99
5.4.70.0120.08311.99
5.4.60.0200.10611.99
5.4.50.0060.07711.99
5.4.40.0080.12911.98
5.4.30.0190.10211.98
5.4.20.0180.11511.97
5.4.10.0150.07111.97
5.4.00.0110.07611.45
5.3.290.0060.06512.80
5.3.280.0160.05712.71
5.3.270.0080.05612.72
5.3.260.0080.06112.72
5.3.250.0070.05212.72
5.3.240.0080.05112.72
5.3.230.0070.06112.71
5.3.220.0110.08212.68
5.3.210.0130.09912.68
5.3.200.0070.08012.68
5.3.190.0100.07912.67
5.3.180.0110.08612.67
5.3.170.0100.08412.67
5.3.160.0080.09112.68
5.3.150.0160.10412.68
5.3.140.0100.08312.66
5.3.130.0080.06012.66
5.3.120.0100.08212.66
5.3.110.0110.09712.65
5.3.100.0090.07712.12
5.3.90.0110.07812.09
5.3.80.0140.07012.07
5.3.70.0110.07812.07
5.3.60.0220.07412.06
5.3.50.0100.04212.02
5.3.40.0100.05212.00
5.3.30.0210.04811.95
5.3.20.0130.05811.75
5.3.10.0150.03311.71
5.3.00.0080.04111.70
5.2.170.0040.0379.19
5.2.160.0080.0459.19
5.2.150.0080.0619.20
5.2.140.0080.0589.18
5.2.130.0060.0449.15
5.2.120.0180.0839.15
5.2.110.0090.0459.15
5.2.100.0070.0589.14
5.2.90.0100.0599.15
5.2.80.0100.0469.14
5.2.70.0110.0599.14
5.2.60.0100.0349.09
5.2.50.0070.0329.07
5.2.40.0100.0299.06
5.2.30.0120.02816.91
5.2.20.0060.03216.89
5.2.10.0060.0298.93
5.2.00.0050.0308.80
5.1.60.0040.0808.09
5.1.50.0070.0718.09
5.1.40.0070.1018.07
5.1.30.0070.0778.42
5.1.20.0050.0668.45
5.1.10.0040.0818.17
5.1.00.0110.1128.17
5.0.50.0060.0646.65
5.0.40.0040.0596.50
5.0.30.0050.0706.31
5.0.20.0040.0586.29
5.0.10.0040.0766.26
5.0.00.0070.1616.25
4.4.90.0030.1074.78
4.4.80.0050.02012.56
4.4.70.0060.02412.55
4.4.60.0080.01812.56
4.4.50.0070.0814.77
4.4.40.0060.1024.71
4.4.30.0030.0924.76
4.4.20.0050.0884.84
4.4.10.0040.0564.84
4.4.00.0030.0664.76
4.3.110.0020.0624.67
4.3.100.0050.0584.67
4.3.90.0050.0734.63
4.3.80.0020.1184.58
4.3.70.0000.1074.63
4.3.60.0080.0794.63
4.3.50.0040.0944.63
4.3.40.0050.1064.54
4.3.30.0060.0553.27
4.3.20.0050.0163.25
4.3.10.0030.0173.22
4.3.00.0000.01710.37

preferences:
35.7 ms | 400 KiB | 5 Q