Mercurial > hg
view tests/test-manifest-merging.t @ 16363:2cdd7e63211b
parsers: incrementally parse the revlog index in C
We only parse entries in a revlog index file when they are actually
needed, and cache them when first requested.
This makes a huge difference to performance on large revlogs when
accessing the tip revision or performing a handful of numeric lookups
(very common cases). For instance, "hg --time tip --template {node}"
on a tree with 300,000 revs takes 0.15 before, 0.02 after.
Even for revlog-intensive operations (e.g. running "hg log" to
completion), the lazy approach is about 1% faster than the eager
parse_index2.
author | Bryan O'Sullivan <bryano@fb.com> |
---|---|
date | Thu, 05 Apr 2012 13:00:35 -0700 |
parents | e5aee120287b |
children | f2719b387380 |
line wrap: on
line source
$ hg init base $ cd base $ echo 'alpha' > alpha $ hg ci -A -m 'add alpha' adding alpha $ cd .. $ hg clone base work updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd work $ echo 'beta' > beta $ hg ci -A -m 'add beta' adding beta $ cd .. $ cd base $ echo 'gamma' > gamma $ hg ci -A -m 'add gamma' adding gamma $ cd .. $ cd work $ hg pull -q $ hg merge 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) Update --clean to revision 1 to simulate a failed merge: $ rm alpha beta gamma $ hg update --clean 1 2 files updated, 0 files merged, 0 files removed, 0 files unresolved