Mercurial > hg
view tests/test-casefolding.t @ 30212:260af19891f2
changegroup: increase write buffer size to 128k
By default, Python defers to the operating system for choosing the
default buffer size on opened files. On my Linux machine, the default
is 4k, which is really small for 2016.
This patch bumps the write buffer size when writing
changegroups/bundles to 128k. This matches the 128k read buffer
we already use on revlogs.
It's worth noting that this only impacts when writing to an explicit
file (such as during `hg bundle`). Buffers when writing to bundle
files via the repo vfs or to a temporary file are not impacted.
When producing a none-v2 bundle file of the mozilla-unified repository,
this change caused the number of write() system calls to drop from
952,449 to 29,788. After this change, the most frequent system
calls are fstat(), read(), lseek(), and open(). There were
2,523,672 system calls after this patch (so a net decrease of
~950k is statistically significant).
This change shows no performance change on my system. But I have a
high-end system with a fast SSD. It is quite possible this change
will have a significant impact on network file systems, where
extra network round trips due to excessive I/O system calls could
introduce significant latency.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sun, 16 Oct 2016 13:35:23 -0700 |
parents | 85785cd3b69f |
children | 76c57e1fe79b |
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#require icasefs $ hg debugfs | grep 'case-sensitive:' case-sensitive: no test file addition with bad case $ hg init repo1 $ cd repo1 $ echo a > a $ hg add A adding a $ hg st A a $ hg ci -m adda $ hg manifest a $ cd .. test case collision on rename (issue750) $ hg init repo2 $ cd repo2 $ echo a > a $ hg --debug ci -Am adda adding a committing files: a committing manifest committing changelog committed changeset 0:07f4944404050f47db2e5c5071e0e84e7a27bba9 Case-changing renames should work: $ hg mv a A $ hg mv A a $ hg st addremove after case-changing rename has no effect (issue4590) $ hg mv a A $ hg addremove recording removal of a as rename to A (100% similar) $ hg revert --all forgetting A undeleting a test changing case of path components $ mkdir D $ echo b > D/b $ hg ci -Am addb D/b $ hg mv D/b d/b D/b: not overwriting - file exists $ hg mv D/b d/c $ hg st A D/c R D/b $ mv D temp $ mv temp d $ hg st A D/c R D/b $ hg revert -aq $ rm d/c $ echo c > D/c $ hg add D/c $ hg st A D/c $ hg ci -m addc D/c $ hg mv d/b d/e moving D/b to D/e (glob) $ hg st A D/e R D/b $ hg revert -aq $ rm d/e $ hg mv d/b D/B moving D/b to D/B (glob) $ hg st A D/B R D/b $ cd .. test case collision between revisions (issue912) $ hg init repo3 $ cd repo3 $ echo a > a $ hg ci -Am adda adding a $ hg rm a $ hg ci -Am removea $ echo A > A on linux hfs keeps the old case stored, force it $ mv a aa $ mv aa A $ hg ci -Am addA adding A used to fail under case insensitive fs $ hg up -C 0 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg up -C 1 files updated, 0 files merged, 1 files removed, 0 files unresolved no clobbering of untracked files with wrong casing $ hg up -r null 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo gold > a $ hg up A: untracked file differs abort: untracked files in working directory differ from files in requested revision [255] $ cat a gold $ rm a test that normal file in different case on target context is not unlinked by largefiles extension. $ cat >> .hg/hgrc <<EOF > [extensions] > largefiles= > EOF $ hg update -q -C 1 $ hg status -A $ echo 'A as largefiles' > A $ hg add --large A $ hg commit -m '#3' created new head $ hg manifest -r 3 .hglf/A $ hg manifest -r 0 a $ hg update -q -C 0 $ hg status -A C a $ hg update -q -C 3 $ hg update -q 0 $ hg up -C -r 2 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg mv A a $ hg diff -g > rename.diff $ hg ci -m 'A -> a' $ hg up -q '.^' $ hg import rename.diff -m "import rename A -> a" applying rename.diff $ hg st ? rename.diff $ hg files a $ find * | sort a rename.diff $ rm rename.diff $ cd .. issue 3342: file in nested directory causes unexpected abort $ hg init issue3342 $ cd issue3342 $ mkdir -p a/B/c/D $ echo e > a/B/c/D/e $ hg add a/B/c/D/e $ hg ci -m 'add e' issue 4481: revert across case only renames $ hg mv a/B/c/D/e a/B/c/d/E $ hg ci -m "uppercase E" $ echo 'foo' > a/B/c/D/E $ hg ci -m 'e content change' $ hg revert --all -r 0 removing a/B/c/D/E (glob) adding a/B/c/D/e (glob) $ find * | sort a a/B a/B/c a/B/c/D a/B/c/D/e a/B/c/D/e.orig $ cd .. issue 3340: mq does not handle case changes correctly in addition to reported case, 'hg qrefresh' is also tested against case changes. $ echo "[extensions]" >> $HGRCPATH $ echo "mq=" >> $HGRCPATH $ hg init issue3340 $ cd issue3340 $ echo a > mIxEdCaSe $ hg add mIxEdCaSe $ hg commit -m '#0' $ hg rename mIxEdCaSe tmp $ hg rename tmp MiXeDcAsE $ hg status -A A MiXeDcAsE mIxEdCaSe R mIxEdCaSe $ hg qnew changecase $ hg status -A C MiXeDcAsE $ hg qpop -a popping changecase patch queue now empty $ hg qnew refresh-casechange $ hg status -A C mIxEdCaSe $ hg rename mIxEdCaSe tmp $ hg rename tmp MiXeDcAsE $ hg status -A A MiXeDcAsE mIxEdCaSe R mIxEdCaSe $ hg qrefresh $ hg status -A C MiXeDcAsE $ hg qpop -a popping refresh-casechange patch queue now empty $ hg qnew refresh-pattern $ hg status $ echo A > A $ hg add adding A $ hg qrefresh a # issue 3271, qrefresh with file handled case wrong $ hg status # empty status means the qrefresh worked #if osx We assume anyone running the tests on a case-insensitive volume on OS X will be using HFS+. If that's not true, this test will fail. $ rm A >>> open(u'a\u200c'.encode('utf-8'), 'w').write('unicode is fun') $ hg status M A #endif $ cd ..