Bug #79896 [NEW]: slower processing of non-fatal errors using custom error handler (7.4.7+)

From: tony dot jin at sbumed dot org Operating system: Windows Server 2016 PHP version: 7.4.8 Package: Performance problem Bug Type: Bug Bug description:slower processing of non-fatal errors using custom error handler (7.4.7+) Description: ------------ seeing 10-100x slower processing of non-fatal errors using custom error handler function on 7.4.7-7.4.8 vs. 7.4.0-7.4.6. https://3v4l.org/WcFJK/perf#output not a c programmer, but i wonder if it could be caused by the following 7.4.6 bug fix: https://bugs.php.net/bug.php?id=79599 Test script: --------------- <?php // see https://3v4l.org/WcFJK/perf#output // 2020.07.25 // performance hit processing non-fatal errors w/ custom error handler (e_notice, e_warning) // affects versions 7.4.7 & 7.4.8 // array of seq. ints $start = 3; $number_of_values = 5000; $seq_array = range($start, $start+$number_of_values-1); // set error handler function error_handler_fn($errno, $errstr, $errfile, $errline) { $dummy = '0'; // print_r(implode(", ", Array($errno, $errstr, $errfile, $errline))."\n"); } set_error_handler("error_handler_fn"); // array to index $array = Array(1,2,3); // run loop $t1 = microtime(true); foreach ($seq_array as $val) { $nothing = $array[$val]; // E_NOTICE (8) - try to index array at undefined index (performance issue) // $nothing2 = count(); // E_WARNING (2) - try to count nothing (similar performance issue) } $t2 = microtime(true); $outmsg = "\n\nRun time: " . round(($t2-$t1)*1000.,2) . " milliseconds (" . phpversion() . ")"; print_r($outmsg); ?> Expected result: ---------------- execution time comparable to 7.4.6 and earlier Actual result: -------------- execution time 10-100x longer on 7.4.7-7.4.8 than on 7.4.6 and earlier -- Edit bug report at https://bugs.php.net/bug.php?id=79896&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=79896&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=79896&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=79896&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=79896&r=needscript Try newer version: https://bugs.php.net/fix.php?id=79896&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=79896&r=support Expected behavior: https://bugs.php.net/fix.php?id=79896&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=79896&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=79896&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=79896&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=79896&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=79896&r=dst IIS Stability: https://bugs.php.net/fix.php?id=79896&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=79896&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=79896&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=79896&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=79896&r=mysqlcfg