Bug #75521 [Com]: unserialize() >3x slower

Edit report at https://bugs.php.net/bug.php?id=75521&edit=1 ID: 75521 Comment by: sailormax at inbox dot lv Reported by: sailormax at inbox dot lv Summary: unserialize() >3x slower Status: Feedback Type: Bug Package: Performance problem Operating System: Windows 10 PHP Version: 7.2.0RC6 Block user comment: N Private report: N New Comment: Additional information: 7.1.11 also has this problem. 7.1.5 is much faster! Previous Comments: ------------------------------------------------------------------------ [2017-11-15 09:21:11] sailormax at inbox dot lv I tested on these builds: http://windows.php.net/downloads/releases/php-7.1.11-nts-Win32-VC14-x64.zip http://windows.php.net/downloads/qa/php-7.2.0RC6-nts-Win32-VC15-x64.zip Windows + Nginx + PHP-FPM Where I can download latest snapshot for Windows x64 non thread safe? ------------------------------------------------------------------------ [2017-11-14 19:18:15] ab@php.net Thanks for the report. I've tried the snippet and actually don't see any slowdown, by numbers here using current dev trees. 7.1: 0.38896012306213 7.2: 0.31357884407043 master: 0.1246612071991 Either it's something HW or environment specific :/ Perhaps you could check with the current snapshots, it could be that something has changed since last RCs. Also be sure the builds you use are of same bitness and thread safety. Thanks. ------------------------------------------------------------------------ [2017-11-14 08:14:54] sailormax at inbox dot lv Description: ------------ Difference in speed between 7.1 and 7.2 of unserialize() = >3x In my test 0.8s vs 0.28s on my PC Test script: --------------- $structure = array( 0, true, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccccccccccccc ddddddddddddddddddddddddddddddd", [1, 2, 3, "aaaaaaaaaaaaaaaaabbbbbbbbbbbbbbccccccccccccccccccccccccc", false] ); $encoded = serialize($structure); $ts = microtime(true); for ($i=0; $i<100000; $i++) $structure = unserialize($encoded); print (microtime(true) - $ts); Expected result: ---------------- similar to results of PHP 7.1 Actual result: -------------- slower >3x ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75521&edit=1