Mercurial > hg
view tests/test-contrib-perf.t @ 30446:b324b4e431e5
posix: give checkexec a fast path; keep the check files and test read only
Before, Mercurial would create a new temporary file every time, stat it, change
its exec mode, stat it again, and delete it. Most of this dance was done to
handle the rare and not-so-essential case of VFAT mounts on unix. The cost of
that was paid by the much more common and important case of using normal file
systems.
Instead, try to create and preserve .hg/cache/checkisexec and
.hg/cache/checknoexec with and without exec flag set. If the files exist and
have correct exec flags set, we can conclude that that file system supports the
exec flag. Best case, the whole exec check can thus be done with two stat
calls. Worst case, we delete the wrong files and check as usual. That will be
because temporary loss of exec bit or on file systems without support for the
exec bit. In that case we check as we did before, with the additional overhead
of one extra stat call.
It is possible that this different test algorithm in some cases on odd file
systems will give different behaviour. Again, I think it will be rare and
special cases and I think it is worth the risk.
test-clone.t happens to show the situation where checkisexec is left behind
from the old style check, while checknoexec only will be created next time a
exec check will be performed.
author | Mads Kiilerich <madski@unity3d.com> |
---|---|
date | Wed, 14 Jan 2015 01:15:26 +0100 |
parents | 605e3b126d46 |
children | 94ca0e13d1fc |
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#require test-repo Set vars: $ . "$TESTDIR/helpers-testrepo.sh" $ CONTRIBDIR="$TESTDIR/../contrib" Prepare repo: $ hg init $ echo this is file a > a $ hg add a $ hg commit -m first $ echo adding to file a >> a $ hg commit -m second $ echo adding more to file a >> a $ hg commit -m third $ hg up -r 0 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo merge-this >> a $ hg commit -m merge-able created new head $ hg up -r 2 1 files updated, 0 files merged, 0 files removed, 0 files unresolved perfstatus $ cat >> $HGRCPATH << EOF > [extensions] > perfstatusext=$CONTRIBDIR/perf.py > [perf] > presleep=0 > stub=on > parentscount=1 > EOF $ hg help perfstatusext perfstatusext extension - helper extension to measure performance list of commands: perfaddremove (no help text available) perfancestors (no help text available) perfancestorset (no help text available) perfannotate (no help text available) perfbdiff benchmark a bdiff between revisions perfbranchmap benchmark the update of a branchmap perfcca (no help text available) perfchangegroupchangelog Benchmark producing a changelog group for a changegroup. perfchangeset (no help text available) perfctxfiles (no help text available) perfdiffwd Profile diff of working directory changes perfdirfoldmap (no help text available) perfdirs (no help text available) perfdirstate (no help text available) perfdirstatedirs (no help text available) perfdirstatefoldmap (no help text available) perfdirstatewrite (no help text available) perffncacheencode (no help text available) perffncacheload (no help text available) perffncachewrite (no help text available) perfheads (no help text available) perfindex (no help text available) perfloadmarkers benchmark the time to parse the on-disk markers for a repo perflog (no help text available) perflookup (no help text available) perflrucachedict (no help text available) perfmanifest (no help text available) perfmergecalculate (no help text available) perfmoonwalk benchmark walking the changelog backwards perfnodelookup (no help text available) perfparents (no help text available) perfpathcopies (no help text available) perfrawfiles (no help text available) perfrevlog Benchmark reading a series of revisions from a revlog. perfrevlogrevision Benchmark obtaining a revlog revision. perfrevrange (no help text available) perfrevset benchmark the execution time of a revset perfstartup (no help text available) perfstatus (no help text available) perftags (no help text available) perftemplating (no help text available) perfvolatilesets benchmark the computation of various volatile set perfwalk (no help text available) (use 'hg help -v perfstatusext' to show built-in aliases and global options) $ hg perfaddremove $ hg perfancestors $ hg perfancestorset 2 $ hg perfannotate a $ hg perfbdiff -c 1 $ hg perfbdiff --alldata 1 $ hg perfbranchmap $ hg perfcca $ hg perfchangegroupchangelog $ hg perfchangeset 2 $ hg perfctxfiles 2 $ hg perfdiffwd $ hg perfdirfoldmap $ hg perfdirs $ hg perfdirstate $ hg perfdirstatedirs $ hg perfdirstatefoldmap $ hg perfdirstatewrite $ hg perffncacheencode $ hg perffncacheload $ hg perffncachewrite $ hg perfheads $ hg perfindex $ hg perfloadmarkers $ hg perflog $ hg perflookup 2 $ hg perflrucache $ hg perfmanifest 2 $ hg perfmergecalculate -r 3 $ hg perfmoonwalk $ hg perfnodelookup 2 $ hg perfpathcopies 1 2 $ hg perfrawfiles 2 $ hg perfrevlog .hg/store/data/a.i $ hg perfrevlogrevision -m 0 $ hg perfrevrange $ hg perfrevset 'all()' $ hg perfstartup $ hg perfstatus $ hg perftags $ hg perftemplating $ hg perfvolatilesets $ hg perfwalk $ hg perfparents Check perf.py for historical portability $ cd "$TESTDIR/.." $ (hg files -r 1.2 glob:mercurial/*.c glob:mercurial/*.py; > hg files -r tip glob:mercurial/*.c glob:mercurial/*.py) | > "$TESTDIR"/check-perf-code.py contrib/perf.py