From: Clemens Buchacher <drizzd@aon.at>
To: Jeff King <peff@peff.net>
Cc: Junio C Hamano <gitster@pobox.com>,
git@vger.kernel.org, msysgit@googlegroups.com,
"Shawn O. Pearce" <spearce@spearce.org>
Subject: Re: [PATCH] git-gui: suggest gc only when counting at least 2 objects
Date: Sun, 13 Sep 2009 23:19:25 +0200 [thread overview]
Message-ID: <20090913211916.GA5029@localhost> (raw)
In-Reply-To: <20090913204433.GA8796@coredump.intra.peff.net>
On Sun, Sep 13, 2009 at 04:44:33PM -0400, Jeff King wrote:
> On Sun, Sep 13, 2009 at 08:41:50PM +0200, Clemens Buchacher wrote:
>
> > On Sun, Sep 13, 2009 at 10:58:45AM -0700, Junio C Hamano wrote:
> > > Somebody cares to explain why this threashold number has to be different
> > > per platform in the first place?
> >
> > I really don't know. I vaguely remember someone claim that performance on
> > Windows suffered from many loose objects more than on other platforms. I
> > can't find any discussion of it though.
>
> Maybe 8ff487c?
Ok. But it's been 2 years since then and if I'm not mistaken, there have
been a number of performance improvements to msysgit. So maybe it's time to
revisit that threshold.
If, on the other hand, requiring 2 objects really is too many, we should
maybe check at least two or four directories, which would greatly improve
the statistic.
For example, the probability of q directories containing q objects, for n
objects total is
n \ q 1 4
50 18% 1%
100 32% 7%
200 54% 38%
500 86% 95%
Clemens
next prev parent reply other threads:[~2009-09-13 21:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-09 19:51 [PATCH] preserve mtime of local clone Clemens Buchacher
2009-09-12 5:09 ` Junio C Hamano
2009-09-12 8:26 ` Clemens Buchacher
2009-09-12 9:03 ` Clemens Buchacher
2009-09-13 3:06 ` Junio C Hamano
2009-09-13 10:49 ` [PATCH v3] " Clemens Buchacher
2009-09-13 16:06 ` [PATCH] git-gui: suggest gc only when counting at least 2 objects Clemens Buchacher
2009-09-13 17:58 ` Junio C Hamano
2009-09-13 18:41 ` Clemens Buchacher
2009-09-13 20:44 ` Jeff King
2009-09-13 21:19 ` Clemens Buchacher [this message]
2009-09-13 22:20 ` [PATCH] git-gui: search 4 directories to improve statistic of gc hint Clemens Buchacher
2009-09-14 3:39 ` [PATCH] git-gui: suggest gc only when counting at least 2 objects Shawn O. Pearce
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