[PATCH 1 of 8] revset: added lazyset implementation to date revset
Lucas Moscovicz
lmoscovicz at fb.com
Tue Feb 11 20:55:16 UTC 2014
# HG changeset patch
# User Lucas Moscovicz <lmoscovicz at fb.com>
# Date 1391472168 28800
# Mon Feb 03 16:02:48 2014 -0800
# Node ID 42080ca95bda3a82c7738e23d77785107de41bf8
# Parent 9bca7c192a62d916e3a91cc305db9d7594ffcb03
revset: added lazyset implementation to date revset
Performance Benchmarking:
$ time hg log -qr "first(date(05/03/2005))"
0:9117c6561b0b
real 0m3.157s
user 0m2.994s
sys 0m0.087s
$ time ./hg log -qr "first(date(05/03/2005))"
0:9117c6561b0b
real 0m0.509s
user 0m0.289s
sys 0m0.070s
diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -582,7 +582,7 @@
# i18n: "date" is a keyword
ds = getstring(x, _("date requires a string"))
dm = util.matchdate(ds)
- return baseset([r for r in subset if dm(repo[r].date()[0])])
+ return lazyset(subset, lambda x: dm(repo[x].date()[0]))
def desc(repo, subset, x):
"""``desc(string)``
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