Bug #53887 [NEW]: When array data is int value, array_intersect() speed VERY SLOW.

From: Operating system: irrelevant PHP version: Irrelevant Package: Arrays related Bug Type: Bug Bug description:When array data is int value, array_intersect() speed VERY SLOW. Description: ------------ When array data is int value, array_intersect() speed VERY SLOW. Test script: --------------- <?php ini_set('memory_limit', -1); $data_a = rand_data(FALSE); $data_b = rand_data(FALSE); $time = microtime(TRUE); $result = array_intersect($data_a, $data_b); $time = microtime(TRUE) - $time; echo " -> array_intersect by intval: {$time}, result: " . count($result) . "\r\n"; $data_a = rand_data(TRUE); $data_b = rand_data(TRUE); $time = microtime(TRUE); $result = array_intersect($data_a, $data_b); $time = microtime(TRUE) - $time; echo " -> array_intersect by string: {$time}, result: " . count($result) . "\r\n"; function rand_data($need_string) { mt_srand(); $result = array(); for ($i = 0; $i < 300000; $i++) { if ($need_string === TRUE) { $result[] = (string)mt_rand(); } else { $result[] = mt_rand(); } } return $result; } ?> Expected result: ---------------- almost same? Actual result: -------------- -> array_intersect by intval: 10.661009073257, result: 47 -> array_intersect by string: 1.3067090511322, result: 41 -- Edit bug report at http://bugs.php.net/bug.php?id=53887&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=53887&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=53887&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=53887&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=53887&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=53887&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=53887&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=53887&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=53887&r=needscript Try newer version: http://bugs.php.net/fix.php?id=53887&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=53887&r=support Expected behavior: http://bugs.php.net/fix.php?id=53887&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=53887&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=53887&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=53887&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53887&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=53887&r=dst IIS Stability: http://bugs.php.net/fix.php?id=53887&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=53887&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=53887&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=53887&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=53887&r=mysqlcfg