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Date: Fri, 01 Oct 2004 09:39:13 -0700
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Subject: Re: [PHP-DEV] Variable fetch optimization
From: andi@zend.com (Andi Gutmans)
References: <5.1.0.14.2.20041001092521.02efb790@localhost>

http://snaps.php.net/~andi/Zend.m4.diff.gz
http://snaps.php.net/~andi/cv.diff.gz

At 09:31 AM 10/1/2004 -0700, Andi Gutmans wrote:
>Hi,
>
>Attached is a patch to optimize variable fetches (basically it caches the 
>fetches so that variables aren't re-fetched every time, most noticeable in 
>loops with the loop control counter but also it's a general improvement).
>It's similar to the patch Sterling and Thies did a year ago in their 
>optimization patch.
>As compiling the zend_execute.c file is starting to take a long time 
>(minutes) due to inlining with the goto VM architecture, I suggest to 
>apply Zend.m4 to make the default the function handler paradigm. The 
>performance difference is not big and it'll make it easier to work on PHP. 
>For production environments one can use a configure switch to turn this on.
>I'd be happy to hear of benchmarks.
>
>In general, there might be problems with extensions which access the 
>active symbol table directly. It's something I still need to look into so 
>please report any problems.
>
>Please try and take some time to test it.
>
>Andi
>
>
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