#47295 [NEW]: Namespace fall back to global function/constant - computation speed
From: david dot thalmann at gmail dot com
Operating system: Any
PHP version: Irrelevant
PHP Bug Type: Documentation problem
Bug description: Namespace fall back to global function/constant - computation speed
Description:
------------
Hello!
As mentioned in the documentation[1]: "PHP will fall back to global
functions or constants if a namespaced function or constant does not
exist". A "fall back" implies (?) more computation (in this case going
through the priority list) which further implies a loss of
speed/performance.
It should be mentioned in the doc - if my assumption is true (based on a
excerp of the internals-mailinglist[2]), that calling a built in function
fully qualified (\built_in_function()) should be prefered over unqualified
(built_in_function()).
I know, this is just a small note to the doc, but built-in functions are
used very often, so this could bring a lot of speed on medium to large
projects.
May add this to the doc when 5.3 is out and/or when it's clear how, what
and when a fallback will be used (see discussion[3]).
Regards
David
[1] http://www.php.net/namespaces.fallback
[2] http://news.php.net/php.internals/41696
[3] http://wiki.php.net/rfc/namespaceresolution
--
Edit bug report at http://bugs.php.net/?id=47295&edit=1
--
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=47295&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=47295&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=47295&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=47295&r=fixedcvs
Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=47295&r=needdocs
Fixed in release: http://bugs.php.net/fix.php?id=47295&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=47295&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=47295&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=47295&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=47295&r=support
Expected behavior: http://bugs.php.net/fix.php?id=47295&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=47295&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=47295&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=47295&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=47295&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=47295&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=47295&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=47295&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=47295&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=47295&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=47295&r=mysqlcfg
Thread (2 messages)
- david dot thalmann at gmail dot com