3v4l.org

run code in 300+ PHP versions simultaneously
<?php function bytesToSize($bytes, $precision = 2) { $symbols = array('B', 'Kb', 'Mb', 'Gb', 'Tb', 'Pb', 'Eb', 'Zb', 'Yb'); $exp = (int)floor(log($bytes) / log(1024)); return sprintf('%.'. $precision .'f '. $symbols[$exp], $bytes / pow(1024, floor($exp))); } function mem() { return bytesToSize(memory_get_usage(true)); } function test($msg, $test) { $t = microtime(true); $test($msg); echo $msg .': <b>'. sprintf('%.6f', microtime(true) - $t) .'</b><br>'; } $array = range(0, 30000); test('foreach', function ($msg) use ($array) { echo $msg . ' before loop mem: '. mem() .PHP_EOL; foreach ($array as $v) { $b = $v; } echo $msg . ' after loop mem: '. mem() .PHP_EOL; }); test('foreach ref', function ($msg) use ($array) { echo $msg . ' before loop mem: '. mem() .PHP_EOL; foreach ($array as &$v) { $b = $v; } unset($v); echo $msg . ' after loop mem: '. mem() .PHP_EOL; }); test('for', function ($msg) use ($array) { echo $msg . ' before loop mem: '. mem() .PHP_EOL; $so = count($array); for ($i = 0; $i < $so; ++$i) { $b = $array[$i]; } echo $msg . ' after loop mem: '. mem() .PHP_EOL; }); test('while each -> list', function ($msg) use ($array) { echo $msg . ' before loop mem: '. mem() .PHP_EOL; while (list($k, $v) = each($array)) { $b =$v; } echo $msg . ' after loop mem: '. mem() .PHP_EOL; });

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)
7.1.70.0030.01019.45
7.1.60.0030.03319.40
7.1.50.0090.02518.95
7.1.00.0030.06024.71
7.0.200.0030.02019.07
7.0.140.0030.08724.32
7.0.60.0170.07322.83
7.0.50.0070.09720.52
7.0.40.0070.05718.09
7.0.30.0130.08718.07
7.0.20.0100.04317.94
7.0.10.0000.09717.97
7.0.00.0070.04718.05
5.6.280.0030.11029.84
5.6.210.0170.11329.46
5.6.200.0100.05726.94
5.6.190.0070.11326.79
5.6.180.0030.06327.01
5.6.170.0230.09726.95
5.6.160.0100.07026.93
5.6.150.0100.08726.93
5.6.140.0130.10726.97
5.6.130.0100.10726.97
5.6.120.0070.10326.97
5.6.110.0070.07327.04
5.6.100.0130.10026.90
5.6.90.0130.10326.89
5.6.80.0070.06026.40
5.6.70.0100.05726.31
5.6.60.0030.11026.27
5.6.50.0030.06326.40
5.6.40.0070.11326.14
5.6.30.0130.05026.27
5.6.20.0170.09326.36
5.6.10.0100.10726.27
5.6.00.0130.08726.31
5.5.350.4130.06029.20
5.5.340.0230.08326.58
5.5.330.0000.11326.73
5.5.320.0100.11026.73
5.5.310.0070.06726.82
5.5.300.0130.08026.79
5.5.290.0130.10326.73
5.5.280.0170.06726.74
5.5.270.0130.09726.80
5.5.260.0170.10026.74
5.5.250.0170.10326.55
5.5.240.0100.06326.20
5.5.230.0100.10726.09
5.5.220.0100.09326.12
5.5.210.0100.10026.17
5.5.200.0130.05326.09
5.5.190.0170.05326.13
5.5.180.0130.08726.16
5.5.160.0070.06726.05
5.5.150.0170.06726.16
5.5.140.0100.06026.17
5.5.130.0170.08026.13
5.5.120.0100.10326.12
5.5.110.0100.08026.17
5.5.100.0070.06025.98
5.5.90.0100.05325.99
5.5.80.0070.06725.98
5.5.70.0000.06026.02
5.5.60.0000.06025.93
5.5.50.0030.06026.02
5.5.40.0070.05325.96
5.5.30.0100.05025.97
5.5.20.0070.05325.96
5.5.10.0070.05725.94
5.5.00.0100.05026.01
5.4.450.0270.06028.02
5.4.440.0100.08028.15
5.4.430.0100.10328.17
5.4.420.0130.11328.15
5.4.410.0100.10028.00
5.4.400.0100.09727.77
5.4.390.0030.11727.74
5.4.380.0230.10027.77
5.4.370.0100.06027.59
5.4.360.0070.06727.62
5.4.350.0200.09327.62
5.4.340.0170.08727.70
5.4.320.0100.08027.77
5.4.310.0000.08327.77
5.4.300.0170.10027.92
5.4.290.0100.07727.72
5.4.280.0100.05727.68
5.4.270.0030.08027.82
5.4.260.0070.05727.61
5.4.250.0030.06027.73
5.4.240.0070.05727.72
5.4.230.0030.05727.72
5.4.220.0030.06027.76
5.4.210.0000.06027.74
5.4.200.0100.05327.63
5.4.190.0000.06327.64
5.4.180.0030.07027.61
5.4.170.0070.05327.68
5.4.160.0100.05327.61
5.4.150.0130.05027.73
5.4.140.0030.05725.25
5.4.130.0100.05025.14
5.4.120.0000.06725.17
5.4.110.0030.05725.29
5.4.100.0070.09025.10
5.4.90.0070.05725.07
5.4.80.0030.06725.12
5.4.70.0200.07725.14
5.4.60.0100.09725.04
5.4.50.0070.06025.13
5.4.40.0030.08724.98
5.4.30.0100.07725.26
5.4.20.0170.10025.21
5.4.10.0030.11725.22
5.4.00.0170.09724.64
5.3.290.0100.11323.23
5.3.280.0100.07023.13
5.3.270.0070.05723.18
5.3.260.0030.06023.15
5.3.250.0030.06023.14
5.3.240.0030.06023.16
5.3.230.0000.06023.15
5.3.220.0100.08723.15
5.3.210.0070.05723.12
5.3.200.0070.05723.12
5.3.190.0030.11723.15
5.3.180.0130.10323.16
5.3.170.0070.10023.12
5.3.160.0100.10023.12
5.3.150.0100.10723.16
5.3.140.0100.10323.11
5.3.130.0070.11323.12
5.3.120.0070.11023.11
5.3.110.0100.07323.14
5.3.100.0130.10322.86
5.3.90.0070.09722.52
5.3.80.0070.11322.51
5.3.70.0070.12022.48
5.3.60.0100.09322.45
5.3.50.0100.08022.48
5.3.40.0100.08322.45
5.3.30.0070.11022.52
5.3.20.0170.10022.18
5.3.10.0070.10021.96
5.3.00.0070.10722.15
5.2.170.0100.02311.05
5.2.160.0070.05311.12
5.2.150.0030.06711.11
5.2.140.0070.06311.25
5.2.130.0100.02311.17
5.2.120.0070.04711.00
5.2.110.0100.05711.32
5.2.100.0030.06011.10
5.2.90.0030.03311.16
5.2.80.0030.06311.14
5.2.70.0070.06311.07
5.2.60.0100.04011.11
5.2.50.0030.05010.98
5.2.40.0100.05710.99
5.2.30.0030.06011.03
5.2.20.0000.06010.96
5.2.10.0000.03710.97
5.2.00.0100.02310.76
5.1.60.0000.0309.98
5.1.50.0030.04010.11
5.1.40.0070.0309.96
5.1.30.0000.05310.38
5.1.20.0030.05710.42
5.1.10.0000.05010.13
5.1.00.0200.04010.02
5.0.50.0030.0308.50
5.0.40.0030.0208.36
5.0.30.0100.0338.45
5.0.20.0000.0338.12
5.0.10.0070.0408.17
5.0.00.0000.0478.19
4.4.90.0000.0337.89
4.4.80.0030.0377.89
4.4.70.0070.0177.89
4.4.60.0000.0177.89
4.4.50.0070.0237.89
4.4.40.0000.0237.89
4.4.30.0070.0337.89
4.4.20.0030.0377.89
4.4.10.0000.0337.89
4.4.00.0030.0277.89
4.3.110.0070.0137.89
4.3.100.0000.0377.89
4.3.90.0070.0307.89
4.3.80.0030.0307.89
4.3.70.0000.0207.89
4.3.60.0030.0277.89
4.3.50.0030.0207.89
4.3.40.0000.0407.89
4.3.30.0000.0307.89
4.3.20.0000.0337.89
4.3.10.0000.0277.89
4.3.00.0070.0307.89

preferences:
37.95 ms | 401 KiB | 5 Q