Mercurial > hg
view tests/test-merge5.t @ 18063:34a1a639d835
revset.children: ignore rev numbers that are too low
This replaces unnecessary parentrevs() calls with calculating min(parentset).
Even though the min operation is O(size of parentset), since parentrevs is
relatively expensive, this tradeoff almost always works in our favour. In a
repository with over 400,000 changesets, hg perfrevset "children(X)" takes:
Set X Before After
-1 0.51s 0.06s
-1000: 0.55s 0.08s
-10000: 0.56s 0.10s
-100000: 0.60s 0.25s
-100000:-99000 0.55s 0.19s
0:100000 0.60s 0.61s
all() 0.72s 0.74s
The relative performance is similar for Mercurial's own repository -- several
times faster in most cases, slightly slower for revisions close to 0 and
all().
author | Siddharth Agarwal <sid0@fb.com> |
---|---|
date | Fri, 07 Dec 2012 10:37:43 -0800 |
parents | 6da47b655d97 |
children | 76df01e56e7f |
line wrap: on
line source
$ hg init $ echo This is file a1 > a $ echo This is file b1 > b $ hg add a b $ hg commit -m "commit #0" $ echo This is file b22 > b $ hg commit -m "comment #1" $ hg update 0 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ rm b $ hg commit -A -m "comment #2" removing b created new head $ hg update 1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg update abort: crosses branches (merge branches or update --check to force update) [255] $ rm b $ hg update -c abort: uncommitted local changes [255] $ hg revert b $ hg update -c 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ mv a c In theory, we shouldn't need the "-y" below, but it prevents this test from hanging when "hg update" erroneously prompts the user for "keep or delete". Should abort: $ hg update -y 1 abort: crosses branches (merge branches or use --clean to discard changes) [255] $ mv c a Should succeed: $ hg update -y 1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved