Mercurial > hg
view tests/test-remotefilelog-clone-tree.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 | a0886a4d6dce |
children | db9e33beb0fb |
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#require no-windows $ . "$TESTDIR/remotefilelog-library.sh" $ hg init master $ cd master $ echo treemanifest >> .hg/requires $ cat >> .hg/hgrc <<EOF > [remotefilelog] > server=True > EOF # uppercase directory name to test encoding $ mkdir -p A/B $ echo x > A/B/x $ hg commit -qAm x $ cd .. # shallow clone from full $ hgcloneshallow ssh://user@dummy/master shallow --noupdate streaming all changes 4 files to transfer, 449 bytes of data transferred 449 bytes in * seconds (*/sec) (glob) searching for changes no changes found $ cd shallow $ cat .hg/requires dotencode exp-remotefilelog-repo-req-1 fncache generaldelta revlogv1 sparserevlog store treemanifest $ find .hg/store/meta | sort .hg/store/meta .hg/store/meta/_a .hg/store/meta/_a/00manifest.i .hg/store/meta/_a/_b .hg/store/meta/_a/_b/00manifest.i $ hg update 1 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 A/B/x x $ ls .hg/store/data $ echo foo > A/B/F $ hg add A/B/F $ hg ci -m 'local content' $ ls .hg/store/data ca31988f085bfb945cb8115b78fabdee40f741aa $ cd .. # shallow clone from shallow $ hgcloneshallow ssh://user@dummy/shallow shallow2 --noupdate streaming all changes 5 files to transfer, 1008 bytes of data transferred 1008 bytes in * seconds (*/sec) (glob) searching for changes no changes found $ cd shallow2 $ cat .hg/requires dotencode exp-remotefilelog-repo-req-1 fncache generaldelta revlogv1 sparserevlog store treemanifest $ ls .hg/store/data ca31988f085bfb945cb8115b78fabdee40f741aa $ hg update 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cat A/B/x x $ cd .. # full clone from shallow # - send stderr to /dev/null because the order of stdout/err causes # flakiness here $ hg clone --noupdate ssh://user@dummy/shallow full 2>/dev/null streaming all changes remote: abort: Cannot clone from a shallow repo to a full repo. [255] # getbundle full clone $ printf '[server]\npreferuncompressed=False\n' >> master/.hg/hgrc $ hgcloneshallow ssh://user@dummy/master shallow3 requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 0 changes to 0 files new changesets 18d955ee7ba0 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ ls shallow3/.hg/store/data $ cat shallow3/.hg/requires dotencode exp-remotefilelog-repo-req-1 fncache generaldelta revlogv1 sparserevlog store treemanifest