3v4l.org

run code in 300+ PHP versions simultaneously
<?php $start = microtime(true); function bytesToSize($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>'. PHP_EOL; } $array = range(0, 30000); test('foreach', function ($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; }); echo 'Memory peak: ' . round(memory_get_peak_usage() / 1048576, 3) .PHP_EOL; echo sprintf('%.6f', microtime(true) - $start) .'</b>'. 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)
7.3.10.0040.02518.65
7.3.00.0140.01718.62
7.2.130.0200.01619.02
7.2.120.0130.01619.09
7.2.110.0030.02618.86
7.2.100.0200.01319.15
7.2.90.0140.01719.13
7.2.80.0130.01718.64
7.2.70.0030.02719.16
7.2.60.0150.01718.52
7.2.50.0150.01518.49
7.2.40.0140.01618.53
7.2.30.0080.02118.58
7.2.20.0590.02118.24
7.2.10.0260.01918.21
7.2.00.0170.02018.69
7.1.250.0060.02318.05
7.1.170.0220.02517.04
7.1.160.0240.02416.86
7.1.150.0130.02316.95
7.1.140.0240.01717.01
7.1.130.0110.02316.80
7.1.120.0130.02016.98
7.1.110.0150.01817.05
7.1.100.0100.02316.85
7.1.90.0170.01816.57
7.1.80.0200.01316.98
7.1.70.0130.02616.70
7.1.60.0390.02635.07
7.1.50.0420.01335.23
7.1.40.0320.02135.01
7.1.30.0380.02234.81
7.1.20.0360.01935.05
7.1.10.0130.02016.80
7.1.00.0150.01816.75

preferences:
29.9 ms | 400 KiB | 5 Q