tree 6d09c53325a7c31e15aa794631ec41c0b36b038c
parent bb3217ce5d5ed682a5c830c40ea031d3c92a8a7e
author Jeremy Stribling <strib@alum.mit.edu> 1504918298 -0700
committer Jeremy Stribling <strib@alum.mit.edu> 1504983617 -0700

plumbing: the commit walker can skip externally-seen commits

When the revlist is computing the set of hashes needed to transfer, it
doesn't need to walk over commits it has already processed.  So, it
can instruct the commit walker not to walk those commits by passing in
its own `seen` map.

For a 36K object repo, this brought the time for `revlist.Objects`
down from 50s to 30s.