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Date: Sat, 4 Sep 2021 08:49:54 +0700
Message-ID: <CAEZPtU4vvBsyxPwq=gCPJiGOJewn+tyqWB-tacR1AHGbGPq9xQ@mail.gmail.com>
To: Hans Henrik Bergan <divinity76@gmail.com>
Cc: PHP internals <internals@lists.php.net>
Content-Type: text/plain; charset="UTF-8"
Subject: Re: [PHP-DEV] Adding a way to disable the stat cache
From: pierre.php@gmail.com (Pierre Joye)

Good morning,

On Sat, Sep 4, 2021 at 4:51 AM Hans Henrik Bergan <divinity76@gmail.com> wrote:
>
> PS i've seen *HORRIBLE* fs performance for php-running-on-windows,
> where the same filesystem operations on the same files took like 5 seconds
> on linux-running-on-vmware-on-laptop-running-windows-10, versus several
> minutes for the same operation on the same laptop on windows 10 directly..
> for people looking for best-case-scenario for the stat cache, try looking
> at windows fs performance.. (if anyone even cares about that? i personally
> don't, i never run anything performance-sensitive-php code on Windows, just
> noticed horrible fs performance in the past)

Windows TS is as far as I remember the main reason for stat cache
being there as well. Not necessarily because stats are slower on
windows but because a userland stat causes multiple system stat
(virtual cwd and related does multiple calls ). It was and most likely
still is a performance hit back then.

As for the option to disable stat cache, I don't see how it can hurt,
as long as it is well documented and off by default. So daemon and
similar apps can disable it if desired. Other apps, I honestly do not
see any gain :).

Best,
-- 
Pierre

@pierrejoye | http://www.libgd.org