Mercurial > hg
view tests/test-update-issue1456.t @ 47119:15395fd8ab28
dirstate-tree: Use HashMap instead of BTreeMap
BTreeMap has the advantage of its "natural" iteration order being the one we need
in the status algorithm. With HashMap however, iteration order is undefined so
we need to allocate a Vec and sort it explicitly.
Unfortunately many BTreeMap operations are slower than in HashMap, and skipping
that extra allocation and sort is not enough to compensate.
Switching to HashMap + sort makes `hg status` 17% faster in one test case,
as measure with hyperfine:
```
Benchmark #1: ../hg2/hg status -R $REPO --config=experimental.dirstate-tree.in-memory=1
Time (mean ± σ): 765.0 ms ± 8.8 ms [User: 1.352 s, System: 0.747 s]
Range (min … max): 751.8 ms … 778.7 ms 10 runs
Benchmark #2: ./hg status -R $REPO --config=experimental.dirstate-tree.in-memory=1
Time (mean ± σ): 651.8 ms ± 9.9 ms [User: 1.251 s, System: 0.799 s]
Range (min … max): 642.2 ms … 671.8 ms 10 runs
Summary
'./hg status -R $REPO --config=experimental.dirstate-tree.in-memory=1' ran
1.17 ± 0.02 times faster than '../hg2/hg status -R $REPO --config=experimental.dirstate-tree.in-memory=1'
```
* ./hg is this revision
* ../hg2/hg is its parent
* $REPO is an old snapshot of mozilla-central
Differential Revision: https://phab.mercurial-scm.org/D10553
author | Simon Sapin <simon.sapin@octobus.net> |
---|---|
date | Thu, 29 Apr 2021 11:32:57 +0200 |
parents | 527ce85c2e60 |
children |
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#require execbit $ rm -rf a $ hg init a $ cd a $ echo foo > foo $ hg ci -qAm0 $ echo toremove > toremove $ echo todelete > todelete $ chmod +x foo toremove todelete $ hg ci -qAm1 Test that local removed/deleted, remote removed works with flags $ hg rm toremove $ rm todelete $ hg co -q 0 $ echo dirty > foo $ hg up -c abort: uncommitted changes [20] $ hg up -q $ cat foo dirty $ hg st -A M foo C todelete C toremove Validate update of standalone execute bit change: $ hg up -C 0 1 files updated, 0 files merged, 2 files removed, 0 files unresolved $ chmod -x foo $ hg ci -m removeexec nothing changed [1] $ hg up -C 0 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg up 3 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg st $ cd ..