Re: how to speed up "git log"?

From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Feb 11, 2007, 23:08 UTC
Message-ID: <Pine.LNX.4.63.0702120003450.22628@wbgn013.biozentrum.uni-wuerzburg.de>
In-Reply-To: <20070211230035.GD31488@spearce.org>

Hi,

On Sun, 11 Feb 2007, Shawn O. Pearce wrote:

Show 8 quoted lines

> 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.

Maybe. But my point (which you did not quote) was this: git log _starts_ very fast, and the information you are most likely after is shown right away. So I don't think it makes sense investing much time to enhance performance for a full log.

Show 6 quoted lines

> > > 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?

No. I was referring to v1.5.0-rc0~62, but was too lazy to look that up.

Ciao, Dscho