Bug #72745 [NEW]: reset() work much slower than foreach()

From: sailormax at inbox dot lv Operating system: PHP version: 7.0.9 Package: Arrays related Bug Type: Bug Bug description:reset() work much slower than foreach() Description: ------------ reset() work much slower than foreach() under PHP7 Looks like developers optimized foreach(), but forgot about reset(). Under PHP5 speeds are similar. Test script: --------------- $arr = array_fill(0, 10000, "a"); $ts = microtime(true); $first_key = -1; foreach ($arr as $k => $v) { $arr2 = $arr; reset($arr2); $first_key = key($arr2); } echo microtime(true)-$ts, "<br />\n"; echo $first_key, "<br />\n"; $ts = microtime(true); $first_key = -1; foreach ($arr as $k => $v) { $arr2 = $arr; foreach ($arr2 as $k2 => $v2) break; $first_key = $k2; } echo microtime(true)-$ts, "<br />\n"; echo $first_key, "<br />\n"; Expected result: ---------------- 0.0011060237884521 0 0.0011060237884521 0 Actual result: -------------- 0.64054489135742 0 0.0011060237884521 0 -- Edit bug report at https://bugs.php.net/bug.php?id=72745&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=72745&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=72745&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=72745&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=72745&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=72745&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=72745&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=72745&r=needscript Try newer version: https://bugs.php.net/fix.php?id=72745&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=72745&r=support Expected behavior: https://bugs.php.net/fix.php?id=72745&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=72745&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=72745&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=72745&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=72745&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=72745&r=dst IIS Stability: https://bugs.php.net/fix.php?id=72745&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=72745&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=72745&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=72745&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=72745&r=mysqlcfg