Re: Adding a new file as if it had existed

> "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?
>