[RFC] Faster load of full inventory for development6-rich-root?

[Ian Clatworthy]

John Arbash Meinel wrote:
> Ian Clatworthy wrote:

>> * 97% of bzr send is taken up in walking 2 inventories: one to find
>>   what to include in the bundle and one to calculate the testament_sha1
>>   value of the revision to merge.
> 
> "1 to find what to include in the bundle" is this a complete walk? Or
> just an iter_changes walk? Certainly it doesn't seem like we should have
> to walk the whole thing.