Re: how to speed up "git log"?

From: Shawn O. Pearce <spearce@spearce.org>
Date: Feb 11, 2007, 23:00 UTC
Message-ID: <20070211230035.GD31488@spearce.org>
In-Reply-To: <Pine.LNX.4.63.0702111745170.22628@wbgn013.biozentrum.uni-wuerzburg.de>

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.