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To: Nikita Popov <nikita.ppv@gmail.com>,
 PHP internals <internals@lists.php.net>
References: <CAF+90c-UQF1u6RSE1H-WDwGVBpB--+ta8axeTtu5D=3mrww0zQ@mail.gmail.com>
Message-ID: <ce7d08a7-7cda-48f1-e3a7-b44094da0916@beccati.com>
Date: Wed, 26 Aug 2020 09:44:28 +0200
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Subject: Re: [PHP-DEV] Session mm support
From: php@beccati.com (Matteo Beccati)

Hi Nikita,

On 26/08/2020 09:37, Nikita Popov wrote:
> Hi internals,
> 
> I've recently found out that compiling PHP with --with-mm has a massive
> negative impact on PHP startup performance (approximately 3-4 times
> slower), to the point that our CI got approximately 2x slower overall with
> it enabled. This is not great.
> 
> As I only found out about the existence of this session backend recently,
> I'm wondering how widely it is used, and whether we wouldn't be better off
> dropping it from php-src. The performance characteristics make it a pretty
> big foot-gun.

I think it might have been used in some deb/rpm packages a very long
time ago and I vaguely recall it being somewhat a recommended setting
for performance.

I have however no recollection of when it stopped being relevant.


Cheers
-- 
Matteo Beccati

Development & Consulting - http://www.beccati.com/