Bug #67124 [NEW]: Typecast (bool) $array slowdown according to array length

From: vovan-ve at yandex dot ru Operating system: Linux PHP version: Irrelevant Package: Performance problem Bug Type: Bug Bug description:Typecast (bool) $array slowdown according to array length Description: ------------ Casting non-empty array to boolean using (bool) takes a time with respect to array length. There are no reasons for this. This is abnormal. Any other checks like if ($array), ($array) ?:, [] === $array and so on are not affected. At least whole PHP 5 is affected by this issue. Test script: --------------- $tests = array( '$empty' => array(), '$full' => range(1, 1000), ); $count = 1 * 1000 * 1000; foreach ($tests as $name => $array) { printf("%-10s", $name); $start = microtime(true); $i = $count; while ($i-- > 0) { (bool) $array; } $total = microtime(true) - $start; printf("%6.2F sec. total\n", $total, $total / $count); } Actual result: -------------- $empty 0.15 sec. total $full 52.03 sec. total -- Edit bug report at https://bugs.php.net/bug.php?id=67124&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=67124&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=67124&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=67124&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=67124&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=67124&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=67124&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=67124&r=needscript Try newer version: https://bugs.php.net/fix.php?id=67124&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=67124&r=support Expected behavior: https://bugs.php.net/fix.php?id=67124&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=67124&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=67124&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=67124&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=67124&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=67124&r=dst IIS Stability: https://bugs.php.net/fix.php?id=67124&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=67124&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=67124&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=67124&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=67124&r=mysqlcfg