From: Andreas Ericsson <ae@op5.se>
Date: Wed, 13 Dec 2006 09:40:28 GMT
Subject: Re: Adding a new file as if it had existed
Message-ID: <457FCA8C.6000300@op5.se>
In-Reply-To: <7vzm9tuft7.fsf@assigned-by-dhcp.cox.net>

Junio C Hamano wrote:
> "Bahadir Balban" <bahadir.balban@gmail.com> writes:
> 
> There is one thing we could further optimize, though.
> 
> Switching branches with 100k blobs in a commit even when there
> are a handful paths different between the branches would still
> need to populate the index by reading two trees and collapsing
> them into a single stage.  In theory, we should be able to do a
> lot better if two-tree case of read-tree took advanrage of
> cache-tree information.  If ce_match_stat() says Ok for all
> paths in a subdirectory and the cached tree object name for that
> subdirectory in the index match what we are reading from the new
> tree, we should be able to skip reading that subdirectory (and
> its subdirectories) from the new tree object at all.
> 
> Anybody interested to give it a try?
> 

I'm not vell-versed enough in git internals to have my hopes high of 
making something useful of it, but if you give me a pointer of where to 
start I'd be happy to try, and perhaps learn something in the process.

-- 
Andreas Ericsson                   andreas.ericsson@op5.se
OP5 AB                             www.op5.se