Mercurial > public > mercurial-scm > hg-stable
diff mercurial/revsetlang.py @ 38625:52f19a840543
revset: add optimization for heads(commonancestors())
Previously, the only way to get these commits were (tested on
mozilla-central):
hg perfrevset 'heads(::a7cf55 and ::d8b15)'
! wall 4.988366 comb 4.960000 user 4.780000 sys 0.180000 (best of 3)
After this patch:
(python)
hg perfrevset 'heads(commonancestors(a7cf55 + d8b15))'
! wall 0.002155 comb 0.000000 user 0.000000 sys 0.000000 (best of 1107)
(C)
hg perfrevset 'heads(commonancestors(a7cf55 + d8b15))'
! wall 0.000568 comb 0.000000 user 0.000000 sys 0.000000 (best of 4646)
| author | Sean Farley <sean@farley.io> |
|---|---|
| date | Tue, 26 Jun 2018 15:26:21 -0700 |
| parents | 03d7f885d5f2 |
| children | e7aa113b14f7 |
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--- a/mercurial/revsetlang.py Mon Jun 18 19:41:54 2018 -0700 +++ b/mercurial/revsetlang.py Tue Jun 26 15:26:21 2018 -0700 @@ -459,6 +459,12 @@ f = getsymbol(x[1]) wa, ta = _optimize(x[2]) w = getattr(symbols.get(f), '_weight', 1) + m = _match('commonancestors(_)', ta) + + # Optimize heads(commonancestors(_)) because we have a fast version + if f == 'heads' and m: + return w + wa, _build('_commonancestorheads(_)', m[1]) + return w + wa, (op, x[1], ta) raise ValueError('invalid operator %r' % op)