Re: Tie'ing variables

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

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