From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Shawn O. Pearce" <spearce@spearce.org>
Subject: Re: how to speed up "git log"?
Date: Sun, 11 Feb 2007 18:00:35 -0500
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References: <200702111252.28393.bruno@clisp.org> <Pine.LNX.4.63.0702111745170.22628@wbgn013.biozentrum.uni-wuerzburg.de>
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Cc: Bruno Haible <bruno@clisp.org>, git@vger.kernel.org
To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
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Johannes Schindelin <Johannes.Schindelin@gmx.de> wrote:
> > 1) Why so much user CPU time?
> 
> See above.

Some of the ideas Nico and I have kicked around for a pack v4 (post
1.5.0, obviously) would speed up revision traversal by bypassing
some of the costly decompression overheads.
 
> > 2) Why so much system CPU time, but only on MacOS X?
> 
> Probably the mmap() problem. Does it go away when you use git 1.5.0-rc4?

What does 1.5.0-rc4 do here that didn't happen before?  Are you
referring to the mmap sliding window?  Because NO_MMAP might be
faster on MacOS X then using mmap (thanks to its slower mmap)... but
I can't say I have performance tested it either way.

-- 
Shawn.