#50486 [NEW]: safe_address optimization for 64 bit size_t for platforms other than gcc x86_64
| From: | basant dot kukreja at gmail dot com | Date: | Wed, 16 Dec 2009 01:30:35 +0000 |
| Subject: | #50486 [NEW]: safe_address optimization for 64 bit size_t for platforms other than gcc x86_64 | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-145768@lists.php.net to get a copy of this message | ||
From: basant dot kukreja at gmail dot com
Operating system: Solaris 10
PHP version: 5.3SVN-2009-12-16 (SVN)
PHP Bug Type: Performance problem
Bug description: safe_address optimization for 64 bit size_t for platforms other than gcc x86_64
Description:
------------
safe_address function calculates nmemb * size + offset and it want to
make
sure that it output doesn't overflow.
It uses doubles for finding overflow which is very inefficent for
platforms
like sparc.
Reproduce code:
---------------
Any Php script causes _ecalloc function.
Expected result:
----------------
Good performance on platform other than gcc + x86_64 combo.
Actual result:
--------------
Poor _ecalloc performance on plaforms like Solaris.
--
Edit bug report at http://bugs.php.net/?id=50486&edit=1
--
Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=50486&r=trysnapshot52
Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=50486&r=trysnapshot53
Try a snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=50486&r=trysnapshot60
Fixed in SVN: http://bugs.php.net/fix.php?id=50486&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=50486&r=needdocs
Fixed in release: http://bugs.php.net/fix.php?id=50486&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=50486&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=50486&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=50486&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=50486&r=support
Expected behavior: http://bugs.php.net/fix.php?id=50486&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=50486&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=50486&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=50486&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=50486&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=50486&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=50486&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=50486&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=50486&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=50486&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=50486&r=mysqlcfg