Re: cvs: php4 /ext/standard basic_functions.c incomplete_class.c php_incomplete_class.h var.c /ext/wddx wddx.c

From: Date: Mon, 06 Aug 2001 16:24:25 +0000
Subject: Re: cvs: php4 /ext/standard basic_functions.c incomplete_class.c php_incomplete_class.h var.c /ext/wddx wddx.c
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By the way, I can't really quantify significantly, as it depends on what kind of minit you have.  For a module such as the COM module, it can double the amount of time it takes the script to run (if you load typelibs).  For some other modules, it can be almost anything, if your minit is mostly empty.  As a general rule, it's a bad thing, since it repeats things which don't have to be repeated.


At 18:34 06/08/2001, Andrei Zmievski wrote:

On Mon, 06 Aug 2001, Zeev Suraski wrote:
Drawbacks:
- It's slow.  We encourage putting expensive operations into the
module_init, using dl() means they end up being done multiple times.

- Under Apache, it's even worse - since in addition to slowliness, it also
ends up consuming significantly more memory, since any memory the extension
allocates in module_init (e.g., the function entries it registers) cannot
be shared between the processes.

This doesn't apply under the standalone version, which is what I'm
mainly worried about.

- It prevents the engine from optimizing function calls at compile time, by
looking at what kind of arguments these functions expect.  This is left for
run-time, which results in significantly slower run-time performance.

Can you quantify "significantly"?

- Literally, none of the extensions properly cleans up after itself,
leaving PHP in various degrees of instability.  This rarely translates to
crashes, because people don't usually have a script in which they dl() and
then use a class, another script in which they use the class without
dl()'ing first, and call the 2nd script right after calling the 1st
one.  Still, from a cleanliness perspective and in theory, it's bad.

I see. I wasn't aware that the extension was supposed to clean up the
classes it registers. I will fix PHP-GTK behavior on this.

-Andrei

Linux is like living in a teepee.
No Windows, no Gates, Apache in house.

                    - Usenet signature


--
Zeev Suraski <zeev@zend.com>
CTO &  co-founder, Zend Technologies Ltd. http://www.zend.com/

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