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view tests/test-narrow-trackedcmd.t @ 44386:8f7c6656ac79
rust-nodemap: pure Rust example
To run, use `cargo run --release --example nodemap`
This demonstrates that simple scenarios entirely written
in Rust can content themselves with `NodeTree<T>`.
The example mmaps both the nodemap file and the changelog index.
We had of course to include an implementation of `RevlogIndex`
directly, which isn't much at this stage. It felt a bit
prematurate to include it in the lib.
Here are some first performance measurements, obtained with
this example, on a clone of mozilla-central with 440000
changesets:
(create) Nodemap constructed in RAM in 153.638305ms
(query CAE63161B68962) found in 22.362us: Ok(Some(269489))
(bench) Did 3 queries in 36.418µs (mean 12.139µs)
(bench) Did 50 queries in 184.318µs (mean 3.686µs)
(bench) Did 100000 queries in 31.053461ms (mean 310ns)
To be fair, even between bench runs, results tend to depend whether
the file is still in kernel caches, and it's not so easy to
get back to a real cold start. The worst we've seen was in the
50us ballpark.
In any busy server setting, the pages would always be in RAM.
We hope it's good enough not to be significantly slower on any
concrete Mercurial operation than the C nodetree when fully in RAM,
and of course this implementation has the serious headstart advantage
of persistence.
Differential Revision: https://phab.mercurial-scm.org/D7797
author | Georges Racinet <georges.racinet@octobus.net> |
---|---|
date | Tue, 18 Feb 2020 19:11:15 +0100 |
parents | 40f78072fda9 |
children | 5c2a4f37eace |
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#testcases flat tree $ . "$TESTDIR/narrow-library.sh" #if tree $ cat << EOF >> $HGRCPATH > [experimental] > treemanifest = 1 > EOF #endif $ hg init master $ cd master $ cat >> .hg/hgrc <<EOF > [narrow] > serveellipses=True > EOF $ mkdir inside $ echo 'inside' > inside/f $ hg add inside/f $ hg commit -m 'add inside' $ mkdir widest $ echo 'widest' > widest/f $ hg add widest/f $ hg commit -m 'add widest' $ mkdir outside $ echo 'outside' > outside/f $ hg add outside/f $ hg commit -m 'add outside' $ cd .. narrow clone the inside file $ hg clone --narrow ssh://user@dummy/master narrow --include inside requesting all changes adding changesets adding manifests adding file changes added 2 changesets with 1 changes to 1 files new changesets *:* (glob) updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd narrow $ hg tracked I path:inside $ ls inside $ cat inside/f inside $ cd .. add more upstream files which we will include in a wider narrow spec $ cd master $ mkdir wider $ echo 'wider' > wider/f $ hg add wider/f $ echo 'widest v2' > widest/f $ hg commit -m 'add wider, update widest' $ echo 'widest v3' > widest/f $ hg commit -m 'update widest v3' $ echo 'inside v2' > inside/f $ hg commit -m 'update inside' $ mkdir outside2 $ echo 'outside2' > outside2/f $ hg add outside2/f $ hg commit -m 'add outside2' $ echo 'widest v4' > widest/f $ hg commit -m 'update widest v4' $ hg log -T "{if(ellipsis, '...')}{rev}: {desc}\n" 7: update widest v4 6: add outside2 5: update inside 4: update widest v3 3: add wider, update widest 2: add outside 1: add widest 0: add inside $ cd .. Testing the --import-rules flag of `hg tracked` command $ cd narrow $ hg tracked --import-rules hg tracked: option --import-rules requires argument hg tracked [OPTIONS]... [REMOTE] show or change the current narrowspec options ([+] can be repeated): --addinclude VALUE [+] new paths to include --removeinclude VALUE [+] old paths to no longer include --auto-remove-includes automatically choose unused includes to remove --addexclude VALUE [+] new paths to exclude --import-rules VALUE import narrowspecs from a file --removeexclude VALUE [+] old paths to no longer exclude --clear whether to replace the existing narrowspec --force-delete-local-changes forces deletion of local changes when narrowing --update-working-copy update working copy when the store has changed -e --ssh CMD specify ssh command to use --remotecmd CMD specify hg command to run on the remote side --insecure do not verify server certificate (ignoring web.cacerts config) (use 'hg tracked -h' to show more help) [255] $ hg tracked --import-rules doesnotexist abort: cannot read narrowspecs from '$TESTTMP/narrow/doesnotexist': $ENOENT$ [255] $ cat > specs <<EOF > %include foo > [include] > path:widest/ > [exclude] > path:inside/ > EOF $ hg tracked --import-rules specs abort: including other spec files using '%include' is not supported in narrowspec [255] $ cat > specs <<EOF > [include] > outisde > [exclude] > inside > EOF $ hg tracked --import-rules specs comparing with ssh://user@dummy/master searching for changes looking for local changes to affected paths deleting data/inside/f.i deleting meta/inside/00manifest.i (tree !) saved backup bundle to $TESTTMP/narrow/.hg/strip-backup/*-widen.hg (glob) adding changesets adding manifests adding file changes added 2 changesets with 0 changes to 0 files $ hg tracked I path:outisde X path:inside Testing the --import-rules flag with --addinclude and --addexclude $ cat > specs <<EOF > [include] > widest > EOF $ hg tracked --import-rules specs --addinclude 'wider/' comparing with ssh://user@dummy/master searching for changes saved backup bundle to $TESTTMP/narrow/.hg/strip-backup/*-widen.hg (glob) adding changesets adding manifests adding file changes added 3 changesets with 1 changes to 1 files $ hg tracked I path:outisde I path:wider I path:widest X path:inside $ cat > specs <<EOF > [exclude] > outside2 > EOF $ hg tracked --import-rules specs --addexclude 'widest' comparing with ssh://user@dummy/master searching for changes looking for local changes to affected paths deleting data/widest/f.i deleting meta/widest/00manifest.i (tree !) $ hg tracked I path:outisde I path:wider X path:inside X path:outside2 X path:widest $ hg tracked --import-rules specs --clear abort: the --clear option is not yet supported [255] Testing with passing a out of wdir file $ cat > ../nspecs <<EOF > [include] > widest > EOF $ hg tracked --import-rules ../nspecs comparing with ssh://user@dummy/master searching for changes saved backup bundle to $TESTTMP/narrow/.hg/strip-backup/*-widen.hg (glob) adding changesets adding manifests adding file changes added 3 changesets with 0 changes to 0 files $ cd .. Testing tracked command on a non-narrow repo $ hg init non-narrow $ cd non-narrow $ hg tracked --addinclude foobar abort: the tracked command is only supported on repositories cloned with --narrow [255]