Mercurial > hg
view tests/test-issue1306.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> |
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date | Fri, 30 Nov 2018 14:35:57 +0100 |
parents | eb586ed5d8ce |
children |
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https://bz.mercurial-scm.org/1306 Initialize remote repo with branches: $ hg init remote $ cd remote $ echo a > a $ hg ci -Ama adding a $ hg branch br marked working directory as branch br (branches are permanent and global, did you want a bookmark?) $ hg ci -Amb $ echo c > c $ hg ci -Amc adding c $ hg log changeset: 2:ae3d9c30ec50 branch: br tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: c changeset: 1:3f7f930ca414 branch: br user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: b changeset: 0:cb9a9f314b8b user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: a $ cd .. Try cloning -r branch: $ hg clone -rbr remote local1 adding changesets adding manifests adding file changes added 3 changesets with 2 changes to 2 files new changesets cb9a9f314b8b:ae3d9c30ec50 updating to branch br 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R local1 parents changeset: 2:ae3d9c30ec50 branch: br tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: c Try cloning -rother clone#branch: $ hg clone -r0 remote#br local2 adding changesets adding manifests adding file changes added 3 changesets with 2 changes to 2 files new changesets cb9a9f314b8b:ae3d9c30ec50 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R local2 parents changeset: 0:cb9a9f314b8b user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: a Try cloning -r1 clone#branch: $ hg clone -r1 remote#br local3 adding changesets adding manifests adding file changes added 3 changesets with 2 changes to 2 files new changesets cb9a9f314b8b:ae3d9c30ec50 updating to branch br 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R local3 parents changeset: 1:3f7f930ca414 branch: br user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: b