Re: Slow fetches of tags

On Wed, 24 May 2006, Junio C Hamano wrote:

A "have" object is not just has_sha1_file(), but it needs to be
reachable from one of our tips we have already verified as
complete

You're right.

And the strange part is that the commit we should give for the tag thing 
_should_ actually be pretty recent, and I wonder why we end up walking the 
whole damn tree history and saying "want" to basically them all. 

IOW, I think there's something more fundamentally wrong with the tag 
following. We _should_ have figured out much more quickly that we have it 
all.

I'm starting to suspect that it's actually a tag-specific problem: we do 
that reachability crud all by commit history, so the tags are a total 
special case, and if we don't send the proper HAVE/WANT for those or mark 
them properly with THEY_HAVE/COMMON etc, maybe the algorithm just gets 
confused.

I need to go pick up my youngest, so I'll be off-line on this for a while. 
Will try to think it through.

		Linus