Re: [PHP-DEV] Tie'ing variables

On Sun, 2003-03-02 at 14:22, Shane Caraveo wrote:
> So I'm not clear on how I am should expect this to work.  A simple script:
> 
> error_reporting(2047);
> print_r($_ENV);
> 
> is now completely broken unless you turn on register_long_arrays.  If 
> that is expected behaviour, register_long_arrays must be on by default.
> 

Of course its not the expected behavior.  The functionality isn't fully
integrated/mature yet. :)

-Sterling

> Shane
> 
> 
> Zeev Suraski wrote:
> > I wanted to do this for some time, but until recently, it wasn't very 
> > feasible, because the order of registration could be designated by the 
> > user (gpc_order, variables_order, etc.).  Now that register_globals is 
> > off by default, and that we have the auto-globals, it's much more feasible.
> > 
> > I implemented this optimization in CVS, so far only for $_ENV and 
> > $_SERVER.  This alone pushed nearly-empty-page req/sec pages from about 
> > 285 to about 400 on my Windows box.  I'll look into fixing the other 
> > ones later.
> > 
> > Pre-requisites for this optimization to kick in:
> > 1.  register_globals being off
> > 2.  register_long_arrays (HTTP_*_VARS) being off
> > 
> > If you want to benchmark w/ vs. w/o, you can disable the optimization by 
> > initializing cb to 0 in php_startup_auto_globals() and 
> > jit_initialization to 0 in php_hash_environment(), both in 
> > main/php_variables.c.
> > 
> > Zeev
> > 
> > At 18:26 01/03/2003, Sterling Hughes wrote:
> > 
> >> Hi,
> >>
> >> Analyzing PHP's routines a bit, it seems that the slowest part of a
> >> "generic" request is populating the special arrays, $_ENV, $_GET, etc.
> >>
> >> I was wondering if it might be possible to "tie" these arrays to a
> >> function (if you don't understand that, look at Perl for a definition).
> >> One could populate them as an overloaded object, and then array accesses
> >> would work - I guess.  But I would prefer a cleaner mechanism.
> >>
> >> This would prevent a costly overhead for elements that don't really need
> >> to be there, and yield only a slight performance cost when accessing
> >> overloaded elements in these arrays.
> >>
> >> -Sterling
> >>
> >> -- 
> >> "The computer programmer is a creator of universes for which he
> >>  alone is responsible. Universes of virtually unlimited complexity
> >>  can be created in the form of computer programs."
> >>     - Joseph Weizenbaum
> >>
> >>
> >> -- 
> >> PHP Development Mailing List <http://www.php.net/>
> >> To unsubscribe, visit: http://www.php.net/unsub.php
> > 
> > 
> > 
-- 
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