Bug #74147 [Fbk->NoF]: Performance degraded after Dec-6-2016

Edit report at https://bugs.php.net/bug.php?id=74147&edit=1 ID: 74147 Updated by: php-bugs@lists.php.net Reported by: 191919 at gmail dot com Summary: Performance degraded after Dec-6-2016 -Status: Feedback +Status: No Feedback Type: Bug Package: Performance problem Operating System: OS X PHP Version: 7.1Git-2017-02-22 (Git) Assigned To: cmb Private report: N New Comment: No feedback was provided. The bug is being suspended because we assume that you are no longer experiencing the problem. If this is not the case and you are able to provide the information that was requested earlier, please do so and change the status of the bug back to "Re-Opened". Thank you. Previous Comments: ------------------------------------------------------------------------ [2021-07-13 15:23:16] cmb@php.net Is this still relevant, or has the reported performance regression been fixed in the meantime? ------------------------------------------------------------------------ [2017-02-22 09:16:34] 191919 at gmail dot com Description: ------------ I found performance regression caused by a series of git commits of Dec 6, 2016. The measurement is based on bench.php from php itself. The purpose is to execute all the benchmark functions 30 times: --- /Users/box/php-src/Zend/bench.php 2016-02-02 18:31:19.000000000 +0800 +++ bench.php 2016-03-17 16:08:58.000000000 +0800 @@ -366,7 +366,7 @@ $num = number_format($end-$start,3); $pad = str_repeat(" ", 24-strlen($name)-strlen($num)); - echo $name.$pad.$num."\n"; + //echo $name.$pad.$num."\n"; ob_start(); return getmicrotime(); } @@ -382,6 +382,7 @@ } $t0 = $t = start_test(); +for ($i=0;$i<30;++$i){ simple(); $t = end_test($t, "simple"); simplecall(); @@ -417,6 +418,7 @@ sieve(30); $t = end_test($t, "sieve(30)"); strcat(200000); +} $t = end_test($t, "strcat(200000)"); total($t0, "Total"); ?> I ran bench.php on a Mac Pro with 12x2.7 Xeon E5 under OS X El Capitan 10.11.6. The compiler is gcc-5.4.0: /opt/bin/gcc -v Using built-in specs. COLLECT_GCC=/opt/bin/gcc COLLECT_LTO_WRAPPER=/opt/libexec/gcc/x86_64-apple-darwin15.6.0/5.4.0/lto-wrapper Target: x86_64-apple-darwin15.6.0 Configured with: ../gcc-5.4.0/configure --prefix=/opt --enable-languages=c,c++,objc,obj-c++ Thread model: posix gcc version 5.4.0 (GCC) The configure script is: YACC=/usr/local/bin/bison CC=/opt/bin/gcc ./configure --prefix=/opt/php7 --enable-opcache --without-sqlite3 --without-pdo-sqlite --disable-phar --without-pear For git fe084168d0e7de28dc0efdd58635748de414ac9e: $ /opt/php7/bin/php bench.php ------------------------ Total 13.853 For git a722970033a8dabb5956625e89655b8eacc38e3a: $ /opt/php7/bin/php bench.php ------------------------ Total 14.432 For git 1113d589dc356cab3abd0f03d311e6205ad1178c: $ /opt/php7/bin/php bench.php ------------------------ Total 14.793 For git b149001ffd3acf5ba3262e361cc012910ede77da: $ /opt/php7/bin/php bench.php ------------------------ Total 15.076 and for the version of the time I wrote this bug report: $ /opt/php7/bin/php bench.php ------------------------ Total 15.353 There is a 10%+ performance loss since then. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=74147&edit=1