revset-ancestorspec: call 'getset' on a 'fullreposet'
Calling 'baseset(repo.changelog)' builds a list for all revisions in
the repo. And we already have the lazy and efficient 'fullreposet'
class for this purpose.
This gives us the usual benefits of the fullreposet:
revset) 100~5
before) wall 0.002712 comb 0.000000 user 0.000000 sys 0.000000 (best of 918)
after) wall 0.000996 comb 0.000000 user 0.000000 sys 0.000000 (best of 2493)
revset) parents(100)~5
before) wall 0.003812 comb 0.010000 user 0.010000 sys 0.000000 (best of 667)
after) wall 0.001038 comb 0.000000 user 0.000000 sys 0.000000 (best of 2361)
revset) (100~5)~5
before) wall 0.005614 comb 0.000000 user 0.000000 sys 0.000000 (best of 446)
after) wall 0.001035 comb 0.000000 user 0.000000 sys 0.000000 (best of 2424)
--- a/mercurial/revset.py Thu Oct 16 23:10:44 2014 -0700
+++ b/mercurial/revset.py Thu Oct 16 23:11:25 2014 -0700
@@ -370,7 +370,7 @@
raise error.ParseError(_("~ expects a number"))
ps = set()
cl = repo.changelog
- for r in getset(repo, baseset(cl), x):
+ for r in getset(repo, fullreposet(repo), x):
for i in range(n):
r = cl.parentrevs(r)[0]
ps.add(r)