Bug #74147 [NEW]: Performance degraded after Dec-6-2016
From: 191919 at gmail dot com
Operating system: OS X
PHP version: 7.1Git-2017-02-22 (Git)
Package: Performance problem
Bug Type: Bug
Bug description:Performance degraded after Dec-6-2016
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 bug report at https://bugs.php.net/bug.php?id=74147&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=74147&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=74147&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=74147&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=74147&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=74147&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=74147&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=74147&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=74147&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=74147&r=support
Expected behavior: https://bugs.php.net/fix.php?id=74147&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=74147&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=74147&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=74147&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74147&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=74147&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=74147&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=74147&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=74147&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=74147&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=74147&r=mysqlcfg
Thread (3 messages)
- 191919 at gmail dot com