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From: Junio C Hamano <gitster@pobox.com>
To: Jeff King <peff@peff.net>
Cc: Derrick Stolee <stolee@gmail.com>,
	Jonathan Tan <jonathantanmy@google.com>,
	git@vger.kernel.org
Subject: Re: [PATCH v2] send-pack: never fetch when checking exclusions
Date: Sat, 12 Oct 2019 09:47:20 +0900
Message-ID: <xmqqftjyg57r.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <20191011161504.GB19741@sigill.intra.peff.net> (Jeff King's message of "Fri, 11 Oct 2019 12:15:05 -0400")

Jeff King <peff@peff.net> writes:

> As a general rule (and why I'm raising this issue in reply to Jonathan's
> patch), I think most or all sites that want OBJECT_INFO_QUICK will want
> SKIP_FETCH_OBJECT as well, and vice versa. The reasoning is generally
> the same:
>
>   - it's OK to racily have a false negative (we'll still be correct, but
>     possibly a little less optimal)
>
>   - it's expected and normal to be missing the object, so spending time
>     double-checking the pack store wastes measurable time in real-world
>     cases

31f5256c ("sha1-file: split OBJECT_INFO_FOR_PREFETCH", 2019-05-28)
separated SKIP_FETCH_OBJECT out of FOR_PREFETCH, the latter of which
was and is SKIP_FETCH and QUICK combined.  Use SKIP_FETCH_OBJECT
alone may need to be re-examined and discouraged?


      parent reply	other threads:[~2019-10-12  0:47 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-07 21:38 [PATCH] " Jonathan Tan
2019-10-08  4:10 ` Junio C Hamano
2019-10-08 18:37   ` [PATCH v2] " Jonathan Tan
2019-10-11  6:12     ` Jeff King
2019-10-11 12:31       ` Derrick Stolee
2019-10-11 16:15         ` Jeff King
2019-10-11 22:08           ` Jonathan Tan
2019-10-17  6:10             ` Jeff King
2019-10-12  0:47           ` Junio C Hamano [this message]

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