3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'foo'; $replacement = 'bar'; $str1 = preg_replace_callback('/^foo$/', function($match) { global $replacement; return $replacement; }, $str); $str2 = preg_replace_callback('/^foo$/', function($match, &$replacement) { return $replacement; }, $str); $str3 = preg_replace_callback('/^foo$/', function($match) use ($replacement) { return $replacement; }, $str); var_dump($str1); var_dump($str2); var_dump($str3);

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)
8.3.60.0070.00718.68
8.3.50.0150.00822.15
8.3.40.0090.00619.00
8.3.30.0070.00719.17
8.3.20.0070.00020.16
8.3.10.0040.00421.95
8.3.00.0000.00822.27
8.2.180.0070.01416.88
8.2.170.0070.00722.96
8.2.160.0110.00420.94
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0060.00326.16
8.2.120.0030.00517.71
8.2.110.0090.00022.20
8.2.100.0060.00618.09
8.2.90.0000.00819.25
8.2.80.0060.00317.97
8.2.70.0000.00817.75
8.2.60.0040.00418.04
8.2.50.0040.00418.07
8.2.40.0030.00518.22
8.2.30.0080.00018.11
8.2.20.0080.00017.86
8.2.10.0050.00318.02
8.2.00.0000.00817.83
8.1.280.0040.01225.92
8.1.270.0070.00022.11
8.1.260.0040.00426.35
8.1.250.0000.00828.09
8.1.240.0030.00623.97
8.1.230.0090.00319.10
8.1.220.0000.00817.74
8.1.210.0040.00418.77
8.1.200.0060.00317.47
8.1.190.0070.00317.43
8.1.180.0040.00418.10
8.1.170.0030.00518.77
8.1.160.0050.00222.05
8.1.150.0040.00418.85
8.1.140.0000.01017.52
8.1.130.0000.00817.91
8.1.120.0040.00417.52
8.1.110.0040.00417.54
8.1.100.0050.00217.63
8.1.90.0040.00417.51
8.1.80.0040.00417.61
8.1.70.0000.00817.64
8.1.60.0040.00417.63
8.1.50.0000.00717.58
8.1.40.0050.00217.68
8.1.30.0040.00417.70
8.1.20.0040.00417.69
8.1.10.0040.00417.59
8.1.00.0040.00417.56
8.0.300.0030.00318.77
8.0.290.0030.00417.18
8.0.280.0000.00718.34
8.0.270.0040.00217.27
8.0.260.0000.00716.94
8.0.250.0000.00717.06
8.0.240.0000.00717.12
8.0.230.0070.00017.03
8.0.220.0000.00716.93
8.0.210.0000.00817.03
8.0.200.0030.00317.21
8.0.190.0000.00817.17
8.0.180.0040.00417.05
8.0.170.0000.00916.98
8.0.160.0050.00217.11
8.0.150.0040.00417.02
8.0.140.0050.00317.12
8.0.130.0000.00613.55
8.0.120.0030.00617.03
8.0.110.0000.00716.93
8.0.100.0040.00416.96
8.0.90.0000.00717.23
8.0.80.0030.01217.18
8.0.70.0040.00417.19
8.0.60.0050.00216.96
8.0.50.0000.00817.17
8.0.30.0140.00917.46
8.0.20.0080.01017.40
8.0.10.0050.00217.24
8.0.00.0100.01017.03
7.4.330.0040.00415.00
7.4.320.0060.00016.68
7.4.300.0030.00316.71
7.4.290.0040.00416.78
7.4.280.0020.00516.82
7.4.270.0000.00716.78
7.4.260.0030.00316.86
7.4.250.0050.00216.70
7.4.240.0040.00416.73
7.4.230.0000.00716.57
7.4.220.0190.00616.68
7.4.210.0050.00916.75
7.4.200.0040.00416.67
7.4.190.0030.00316.88
7.4.160.0090.00616.87
7.4.150.0100.00717.40
7.4.140.0090.01117.86
7.4.130.0110.01016.87
7.4.120.0110.00716.63
7.4.110.0090.00916.67
7.4.100.0130.01016.75
7.4.90.0070.01116.75
7.4.80.0120.01319.39
7.4.70.0070.01016.71
7.4.60.0090.00616.87
7.4.50.0000.00816.77
7.4.40.0040.01222.77
7.4.30.0060.00916.69
7.4.00.0120.00615.07
7.3.330.0000.00513.32
7.3.320.0000.00613.24
7.3.310.0000.00716.28
7.3.300.0030.00316.47
7.3.290.0090.00616.38
7.3.280.0110.00716.46
7.3.270.0080.00817.40
7.3.260.0060.01116.52
7.3.250.0160.00516.51
7.3.240.0100.00716.55
7.3.230.0140.00716.75
7.3.210.0120.00916.42
7.3.200.0130.00619.39
7.3.190.0080.01116.75
7.3.180.0030.01716.69
7.3.170.0000.01516.57
7.3.160.0090.00616.55
7.3.120.0140.00014.98
7.3.10.0220.00016.72
7.3.00.0150.01116.20
7.2.330.0100.00716.80
7.2.320.0060.01216.81
7.2.310.0160.00416.73
7.2.300.0120.00616.63
7.2.290.0130.00316.75
7.2.130.0070.00716.97
7.2.120.0100.00716.56
7.2.110.0090.00916.79
7.2.100.0110.00716.88
7.2.90.0030.01616.80
7.2.80.0090.00317.00
7.2.70.0170.00316.88
7.2.60.0050.00717.00
7.2.50.0160.00617.14
7.2.40.0100.00717.14
7.2.30.0130.01016.66
7.2.20.0040.00817.10
7.2.10.0040.01516.99
7.2.00.0090.00818.39
7.1.250.0070.00315.86
7.1.200.0070.00715.97
7.1.100.0240.00818.31
7.1.70.0060.00317.28
7.1.60.0100.01319.82
7.1.50.0120.01217.23
7.1.00.0000.07722.41
7.0.200.0070.00416.91
7.0.140.0070.07022.09
7.0.60.0330.07020.02
7.0.50.0200.06017.84
7.0.40.0070.04320.16
7.0.30.0230.04020.26
7.0.20.0330.04720.14
7.0.10.0130.08020.35
7.0.00.0100.08020.25
5.6.280.0030.07321.09
5.6.210.0100.08020.52
5.6.200.0100.03718.12
5.6.190.0030.06320.61
5.6.180.0270.04320.46
5.6.170.0470.06320.58
5.6.160.0130.05020.52
5.6.150.0030.06718.27
5.6.140.0100.05318.18
5.6.130.0000.04318.18
5.6.120.0070.05721.01
5.6.110.0070.08721.15
5.6.100.0100.08020.99
5.6.90.0200.07721.11
5.6.80.0170.07320.54
5.5.350.0130.04320.43
5.5.340.0070.08717.99
5.5.330.0100.08020.31
5.5.320.0400.07320.31
5.5.310.0200.08720.36
5.5.300.0030.04718.07
5.5.290.0070.08318.04
5.5.280.0070.06320.69
5.5.270.0070.07020.68
5.5.260.0070.06720.65
5.5.250.0100.08720.78
5.5.240.0200.04720.23
5.4.450.0430.06719.46
5.4.440.0930.05719.50
5.4.430.1470.00019.39
5.4.420.1100.00019.21
5.4.410.0170.05318.68
5.4.400.0030.05718.52
5.4.390.0200.04018.54
5.4.380.0330.04718.52
5.4.370.0200.05018.73
5.4.360.0100.06018.80
5.4.350.0200.05318.79
5.4.340.0200.05018.82
5.4.320.0130.04712.51
5.4.310.0050.04012.50
5.4.300.0040.03812.51
5.4.290.0060.03812.51
5.4.280.0070.03912.40
5.4.270.0040.03712.38
5.4.260.0080.03412.38
5.4.250.0090.03512.38
5.4.240.0040.03912.38
5.4.230.0050.03812.36
5.4.220.0080.03412.36
5.4.210.0040.03712.37
5.4.200.0090.03512.37
5.4.190.0050.03912.36
5.4.180.0050.03812.36
5.4.170.0040.03812.38
5.4.160.0040.03812.37
5.4.150.0060.03612.37
5.4.140.0070.03612.05
5.4.130.0040.03712.04
5.4.120.0060.03612.00
5.4.110.0110.03411.99
5.4.100.0090.03312.00
5.4.90.0050.04211.99
5.4.80.0040.04011.99
5.4.70.0050.03511.99
5.4.60.0060.03911.99
5.4.50.0050.03611.99
5.4.40.0050.03511.97
5.4.30.0060.03511.97
5.4.20.0060.03611.97
5.4.10.0050.03411.97
5.4.00.0040.03611.46
5.3.290.0070.04012.80
5.3.280.0060.03812.71
5.3.270.0050.04012.73
5.3.260.0070.03712.72
5.3.250.0020.04012.72
5.3.240.0050.03912.72
5.3.230.0060.03712.71
5.3.220.0090.04112.68
5.3.210.0050.04312.68
5.3.200.0070.03812.68
5.3.190.0060.03912.68
5.3.180.0060.03912.67
5.3.170.0040.03912.67
5.3.160.0090.04912.67
5.3.150.0070.03912.67
5.3.140.0040.04112.66
5.3.130.0080.03912.66
5.3.120.0130.04912.66
5.3.110.0120.04212.66
5.3.100.0110.03212.12
5.3.90.0050.03712.09
5.3.80.0100.03212.07
5.3.70.0060.03612.07
5.3.60.0050.03812.07
5.3.50.0080.03412.00
5.3.40.0090.04012.00
5.3.30.0090.03211.97
5.3.20.0070.03711.75
5.3.10.0070.03211.71
5.3.00.0080.03311.70
5.2.170.0040.0319.15
5.2.160.0060.0289.15
5.2.150.0050.0319.15
5.2.140.0030.0329.14
5.2.130.0070.0269.11
5.2.120.0070.0269.11
5.2.110.0060.0279.11
5.2.100.0020.0319.11
5.2.90.0060.0339.11
5.2.80.0050.0309.10
5.2.70.0050.0299.10
5.2.60.0060.0399.05
5.2.50.0100.0259.03
5.2.40.0090.0279.00
5.2.30.0050.0298.98
5.2.20.0070.0268.97
5.2.10.0060.0268.89
5.2.00.0030.0308.75
5.1.60.0040.0238.04
5.1.50.0040.0248.04
5.1.40.0060.0228.03
5.1.30.0040.0268.37
5.1.20.0050.0258.40
5.1.10.0040.0268.12
5.1.00.0040.0268.11
5.0.50.0050.0206.59
5.0.40.0040.0186.45
5.0.30.0040.0306.27
5.0.20.0020.0216.24
5.0.10.0030.0206.21
5.0.00.0030.0316.20
4.4.90.0010.0174.78
4.4.80.0030.0164.76
4.4.70.0050.0134.76
4.4.60.0010.0184.76
4.4.50.0030.0154.77
4.4.40.0050.0234.71
4.4.30.0020.0164.75
4.4.20.0020.0164.84
4.4.10.0050.0144.85
4.4.00.0030.0294.76
4.3.110.0060.0174.67
4.3.100.0030.0144.67
4.3.90.0040.0134.63
4.3.80.0020.0254.58
4.3.70.0020.0154.63
4.3.60.0050.0164.63
4.3.50.0040.0154.62
4.3.40.0010.0254.54
4.3.30.0030.0153.27
4.3.20.0000.0183.25
4.3.10.0030.0153.22
4.3.00.0170.0206.88

preferences:
42.13 ms | 401 KiB | 5 Q