Bug #79023 [NEW]: very slow hash('crc32b', ...)

From: bugzilla77 at gmail dot com Operating system: Windows 10 PHP version: 7.4.1 Package: hash related Bug Type: Bug Bug description:very slow hash('crc32b', ...) Description: ------------ very slow hash('crc32b', ...) Test script: --------------- <?php $i=2000000; $x=sha1(microtime(1).mt_rand()); $time_a=microtime(true); for($z=0;$z<$i;$z++){ $a=crc32($x); } $time_a=microtime(true)-$time_a; $time_b=microtime(true); for($z=0;$z<$i;$z++){ $b=hash('crc32b',$x); } $time_b=microtime(true)-$time_b; $time_c=microtime(true); for($z=0;$z<$i;$z++){ $c=hash('crc32b',$x,true); } $time_c=microtime(true)-$time_c; print($time_a.' sec'); print('<br/>'); print($time_b.' sec'); print('<br/>'); print($time_c.' sec'); ?> Expected result: ---------------- 0.34135699272156 sec <=0.34135699272156 sec <=0.34135699272156 sec Actual result: -------------- 0.34135699272156 sec 0.77139401435852 sec 0.80676794052124 sec -- Edit bug report at https://bugs.php.net/bug.php?id=79023&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=79023&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=79023&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=79023&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=79023&r=needscript Try newer version: https://bugs.php.net/fix.php?id=79023&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=79023&r=support Expected behavior: https://bugs.php.net/fix.php?id=79023&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=79023&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=79023&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=79023&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=79023&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=79023&r=dst IIS Stability: https://bugs.php.net/fix.php?id=79023&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=79023&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=79023&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=79023&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=79023&r=mysqlcfg