From: "Todd C. Miller" <millert@openbsd.org>
Subject: Re: optimise reading the file index
To: Stefan Sperling <stsp@stsp.name>
Cc: Christian Weisgerber <naddy@mips.inka.de>, gameoftrees@openbsd.org
Date: Thu, 27 Jul 2023 10:15:15 -0600

On Thu, 27 Jul 2023 18:13:00 +0200, Stefan Sperling wrote:

> It seems to be about one stat call per file which can't get much better?
>
> $ find /usr/src | wc -l
>    99998

If the current code does stat + open instead of open + fstat there
may be some room for improvement.

> In any case, this fileindex optimization isn't about making 'got status'
> run faster. We noticed a visible delay when starting up tog, where the
> newly added base-commit marker takes a short time to appear on some systems.
> I determined that the time was spent reading the file index, which prompted
> Mark to write this patch.

Fair enough.

 - todd