From: Jonathan Nieder <jrnieder@gmail.com>
Date: Fri, 17 Dec 2010 01:45:39 GMT
Subject: Re: Performance issue exposed by git-filter-branch
Message-ID: <20101217014539.GA6775@burratino>
In-Reply-To: <41C1B4AC-8427-4D62-BEB6-689A4BE4EE5B@irridia.com>

Hi Ken,

Ken Brownfield wrote:

> Is there a way to apply the optimizations mentioned in that old
> thread to the code paths used by git-filter-branch (mainly git-read
> and git-rm, seemingly), or is there another way to investigate and
> improve the performance of the filter?

Which old thread?

You might be able to get faster results using the approach of [1]
(using "git cat-file --batch-check" to collect the trees you want
and "git fast-import" to paste them together), which avoids unpacking
trees when not needed.

Hope that helps,
Jonathan

[1] http://repo.or.cz/w/git/barrbrain/github.git/commitdiff/db-svn-filter-root