note 75692 added to function.each

Regarding speed of foreach vs while(list) =each I wrote a benchmark script and the results are that clearly foreach is faster. MUCH faster. Even with huge arrays (especially with huge arrays). I tested with sizes 100,000. 1,000,000 and 10,000,000. To do the test with 10 million i had to set my memory limit real high, it was close to 1gb by the time it actually worked. Anyways, <?php function getDiff($start, $end) { $s = explode(' ', $start); $stot = $s[1] + $s[0]; $e = explode(' ', $end); $etot = $e[1] + $e[0]; return $etot - $stot; } $lim=10000000; $arr = array(); for ($i=0; $i<$lim; $i++) { $arr[$i] = $i/2; } $start = microtime(); foreach ($arr as $key=>$val); $end = microtime(); echo "time for foreach = " . getDiff($start, $end) . ".\n"; reset($arr); $start = microtime(); while (list($key, $val) = each($arr)); $end = microtime(); echo "time list each = " . getDiff($start, $end) . ".\n"; ?> here are some of my results: with 1,000,000 time for foreach = 0.0244591236115. time list each = 0.158002853394. desktop:/media/sda5/mpwolfe/tests$ php test.php time for foreach = 0.0245339870453. time list each = 0.154260158539. desktop:/media/sda5/mpwolfe/tests$ php test.php time for foreach = 0.0269000530243. time list each = 0.157305955887. then with 10,000,000: desktop:/media/sda5/mpwolfe/tests$ php test.php time for foreach = 1.96586894989. time list each = 14.1371650696. desktop:/media/sda5/mpwolfe/tests$ php test.php time for foreach = 2.02504014969. time list each = 13.7696218491. desktop:/media/sda5/mpwolfe/tests$ php test.php time for foreach = 2.0246758461. time list each = 13.8425710201. by the way, these results are with php 5.2 i believe, and a linux machine with 3gb of ram and 2.8ghz dual core pentium ---- Server IP: 69.147.83.197 Probable Submitter: 75.15.139.90 ---- Manual Page -- http://www.php.net/manual/en/function.each.php Edit -- https://master.php.net/note/edit/75692 Del: integrated -- https://master.php.net/note/delete/75692/integrated Del: useless -- https://master.php.net/note/delete/75692/useless Del: bad code -- https://master.php.net/note/delete/75692/bad+code Del: spam -- https://master.php.net/note/delete/75692/spam Del: non-english -- https://master.php.net/note/delete/75692/non-english Del: in docs -- https://master.php.net/note/delete/75692/in+docs Del: other reasons-- https://master.php.net/note/delete/75692 Reject -- https://master.php.net/note/reject/75692 Search -- https://master.php.net/manage/user-notes.php