Mercurial > hg
view tests/test-remotefilelog-partial-shallow.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 | 0800d9e6e216 |
children | 84a93fa7ecfd |
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#require no-windows $ . "$TESTDIR/remotefilelog-library.sh" $ hg init master $ cd master $ cat >> .hg/hgrc <<EOF > [remotefilelog] > server=True > EOF $ echo x > foo $ echo y > bar $ hg commit -qAm one $ cd .. # partial shallow clone $ hg clone --shallow ssh://user@dummy/master shallow --noupdate --config remotefilelog.includepattern=foo streaming all changes 3 files to transfer, 336 bytes of data transferred 336 bytes in * seconds (*/sec) (glob) searching for changes no changes found $ cat >> shallow/.hg/hgrc <<EOF > [remotefilelog] > cachepath=$PWD/hgcache > debug=True > includepattern=foo > reponame = master > [extensions] > remotefilelog= > EOF $ ls shallow/.hg/store/data bar.i # update partial clone $ cd shallow $ hg update 2 files updated, 0 files merged, 0 files removed, 0 files unresolved 1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob) $ cat foo x $ cat bar y $ cd .. # pull partial clone $ cd master $ echo a >> foo $ echo b >> bar $ hg commit -qm two $ cd ../shallow $ hg pull pulling from ssh://user@dummy/master searching for changes adding changesets adding manifests adding file changes added 1 changesets with 0 changes to 0 files new changesets a9688f18cb91 (run 'hg update' to get a working copy) $ hg update 2 files updated, 0 files merged, 0 files removed, 0 files unresolved 1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob) $ cat foo x a $ cat bar y b $ cd ..