Re: Adding a new file as if it had existed

Junio C Hamano wrote:

"Bahadir Balban" [off-list ref] 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