revset: added lazyset implementation to keyword revset
Performance benchmarking:
$ time hg log -qr "first(keyword(changeset))"
0:9117c6561b0b
real 0m3.466s
user 0m3.345s
sys 0m0.072s
$ time ./hg log -qr "first(keyword(changeset))"
0:9117c6561b0b
real 0m0.365s
user 0m0.199s
sys 0m0.083s
--- a/mercurial/revset.py Tue Jan 28 16:19:30 2014 -0800
+++ b/mercurial/revset.py Wed Jan 29 09:04:03 2014 -0800
@@ -921,13 +921,13 @@
"""
# i18n: "keyword" is a keyword
kw = encoding.lower(getstring(x, _("keyword requires a string")))
- l = []
- for r in subset:
+
+ def matches(r):
c = repo[r]
- if util.any(kw in encoding.lower(t)
- for t in c.files() + [c.user(), c.description()]):
- l.append(r)
- return baseset(l)
+ return util.any(kw in encoding.lower(t) for t in c.files() + [c.user(),
+ c.description()])
+
+ return lazyset(subset, matches)
def limit(repo, subset, x):
"""``limit(set, [n])``