Tony Tung <tonytung@merly.org> [Mon, 02 May 2016 15:22:16 -0700] rev 29056
manifest: improve filesnotin performance by using lazymanifest diff
lazymanifests can compute diffs significantly faster than taking the set
of two manifests and calculating the delta.
when running hg diff --git -c . on Facebook's big repo, this reduces the
run time from 2.1s to 1.5s.