Re: [PATCH v2] object-file: reprepare alternates when necessary

From: Eric Wong <e@80x24.org>
Date: Mar 9, 2023, 09:06 UTC
Message-ID: <20230309090608.M92573@dcvr>
In-Reply-To: <ZAmJtnLgwimRBGTb@coredump.intra.peff.net>

Jeff King <peff@peff.net> wrote:

Show 5 quoted lines

> The only downside might be performance. For sane cases, I think scanning
> the new alternates is OK. I know Eric (cc'd) has some crazy
> 100k-alternate setup (from 407532f82d, etc), but I'd expect a reprepare
> there is already expensive (we already have to re-scan every one of
> those directories for packfiles, and throw out any loose object caches).

I'm not sure if that 100k alternate thing is happening, yet... (initial specs called for ~30k, but I figured it might grow)

If it does, I'm thinking about enhancing --batch-command, to support `add-alternate' to dynamically add alternates while running cat-file.

Right now, my biggest use case is only 250 alternates or so.