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Date: Thu, 9 Dec 2004 12:53:47 +0100 (CET)
To: Matt W <php_lists@realplain.com>
cc: internals@lists.php.net
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Subject: Re: [PHP-DEV] Memory needed for arrays? And major performance problems
 filling an array
From: derick@php.net (Derick Rethans)

On Thu, 9 Dec 2004, Matt W wrote:

> Before I describe my issue, I had been wondering how I can tell/estimate
> how much memory PHP will use for arrays?  Is there at least a rough formula
> someone can tell me?

42 * number of array elements + size of keys + data

> This is disappointing, especially being caused by an array that doesn't
> seem too outrageously large (and I'd like to go larger). :-( It's going to
> suck if I can't come up with a way to get it faster... Is there anything
> that would be different on a version newer than 4.3.6, as I didn't try any
> yet? Or if it's some Windows thing, then I don't care as much.
>
> Comments, suggestions?

Make a custom C extension.. I don't know why you needs arrays this
large, but it sounds like a application design flaw.

Derick