Mercurial > hg
view tests/test-convert-clonebranches.t @ 41247:a89b20a49c13
rust-cpython: using MissingAncestors from Python code
As precedently done with LazyAncestors on cpython.rs, we test for the
presence of the 'rustext' module.
incrementalmissingrevs() has two callers within the Mercurial core:
`setdiscovery.partialdiscovery` and the `only()` revset.
This move shows a significant discovery performance improvement
in cases where the baseline is slow: using perfdiscovery on the PyPy
repos, prepared with `contrib/discovery-helper <repo> 50 100`, we
get averaged medians of 403ms with the Rust version vs 742ms without
(about 45% better).
But there are still indications that performance can be worse in cases
the baseline is fast, possibly due to the conversion from Python to
Rust and back becoming the bottleneck. We could measure this on
mozilla-central in cases were the delta is just a few changesets.
This requires confirmation, but if that's the reason, then an
upcoming `partialdiscovery` fully in Rust should solve the problem.
Differential Revision: https://phab.mercurial-scm.org/D5551
author | Georges Racinet <georges.racinet@octobus.net> |
---|---|
date | Fri, 30 Nov 2018 14:35:57 +0100 |
parents | 5abc47d4ca6b |
children | 42d2b31cee0b |
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$ cat <<EOF >> $HGRCPATH > [extensions] > convert = > [convert] > hg.tagsbranch = 0 > EOF $ hg init source $ cd source $ echo a > a $ hg ci -qAm adda Add a merge with one parent in the same branch $ echo a >> a $ hg ci -qAm changea $ hg up -qC 0 $ hg branch branch0 marked working directory as branch branch0 (branches are permanent and global, did you want a bookmark?) $ echo b > b $ hg ci -qAm addb $ hg up -qC $ hg merge default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg ci -qm mergeab $ hg tag -ql mergeab $ cd .. Miss perl... sometimes $ cat > filter.py <<EOF > from __future__ import absolute_import > import re > import sys > > r = re.compile(r'^(?:\d+|pulling from)') > sys.stdout.writelines([l for l in sys.stdin if r.search(l)]) > EOF convert $ hg convert -v --config convert.hg.clonebranches=1 source dest | > "$PYTHON" filter.py 3 adda 2 changea 1 addb pulling from default into branch0 1 changesets found 0 mergeab pulling from default into branch0 1 changesets found Add a merge with both parents and child in different branches $ cd source $ hg branch branch1 marked working directory as branch branch1 $ echo a > file1 $ hg ci -qAm c1 $ hg up -qC mergeab $ hg branch branch2 marked working directory as branch branch2 $ echo a > file2 $ hg ci -qAm c2 $ hg merge branch1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg branch branch3 marked working directory as branch branch3 $ hg ci -qAm c3 $ cd .. incremental conversion $ hg convert -v --config convert.hg.clonebranches=1 source dest | > "$PYTHON" filter.py 2 c1 pulling from branch0 into branch1 4 changesets found 1 c2 pulling from branch0 into branch2 4 changesets found 0 c3 pulling from branch1 into branch3 5 changesets found pulling from branch2 into branch3 1 changesets found