Mercurial > hg
view tests/test-mq-qnew.t @ 30561:7c0c722d568d
bdiff: early pruning of common prefix before doing expensive computations
It seems quite common that files don't change completely. New lines are often
pretty much appended, and modifications will often only change a small section
of the file which on average will be in the middle.
There can thus be a big win by pruning a common prefix before starting the more
expensive search for longest common substrings.
Worst case, it will scan through a long sequence of similar bytes without
encountering a newline. Splitlines will then have to do the same again ...
twice for each side. If similar lines are found, splitlines will save the
double iteration and hashing of the lines ... plus there will be less lines to
find common substrings in.
This change might in some cases make the algorith pick shorter or less optimal
common substrings. We can't have the cake and eat it.
This make hg --time bundle --base null -r 4.0 go from 14.5 to 15 s - a 3%
increase.
On mozilla-unified:
perfbdiff -m 3041e4d59df2
! wall 0.053088 comb 0.060000 user 0.060000 sys 0.000000 (best of 100) to
! wall 0.024618 comb 0.020000 user 0.020000 sys 0.000000 (best of 116)
perfbdiff 0e9928989e9c --alldata --count 10
! wall 0.702075 comb 0.700000 user 0.700000 sys 0.000000 (best of 15) to
! wall 0.579235 comb 0.580000 user 0.580000 sys 0.000000 (best of 18)
author | Mads Kiilerich <madski@unity3d.com> |
---|---|
date | Wed, 16 Nov 2016 19:45:35 +0100 |
parents | 4414d500604f |
children | 448acdee9161 |
line wrap: on
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$ catpatch() { > cat $1 | sed -e "s/^\(# Parent \).*/\1/" > } $ echo "[extensions]" >> $HGRCPATH $ echo "mq=" >> $HGRCPATH $ runtest() { > hg init mq > cd mq > > echo a > a > hg ci -Ama > > echo '% qnew should refuse bad patch names' > hg qnew series > hg qnew status > hg qnew guards > hg qnew . > hg qnew .. > hg qnew .hgignore > hg qnew .mqfoo > hg qnew 'foo#bar' > hg qnew 'foo:bar' > hg qnew "`echo foo; echo bar`" > > hg qinit -c > > echo '% qnew with name containing slash' > hg qnew foo/ > hg qnew foo/bar.patch > hg qnew foo > hg qseries > hg qpop > hg qdelete foo/bar.patch > > echo '% qnew with uncommitted changes' > echo a > somefile > hg add somefile > hg qnew uncommitted.patch > hg st > hg qseries > > echo '% qnew implies add' > hg -R .hg/patches st > > echo '% qnew missing' > hg qnew missing.patch missing > > echo '% qnew -m' > hg qnew -m 'foo bar' mtest.patch > catpatch .hg/patches/mtest.patch > > echo '% qnew twice' > hg qnew first.patch > hg qnew first.patch > > touch ../first.patch > hg qimport ../first.patch > > echo '% qnew -f from a subdirectory' > hg qpop -a > mkdir d > cd d > echo b > b > hg ci -Am t > echo b >> b > hg st > hg qnew -g -f p > catpatch ../.hg/patches/p > > echo '% qnew -u with no username configured' > HGUSER= hg qnew -u blue red > catpatch ../.hg/patches/red > > echo '% qnew -e -u with no username configured' > HGUSER= hg qnew -e -u chartreuse fucsia > catpatch ../.hg/patches/fucsia > > echo '% fail when trying to import a merge' > hg init merge > cd merge > touch a > hg ci -Am null > echo a >> a > hg ci -m a > hg up -r 0 > echo b >> a > hg ci -m b > hg merge -f 1 > hg resolve --mark a > hg qnew -f merge > > cd ../../.. > rm -r mq > } plain headers $ echo "[mq]" >> $HGRCPATH $ echo "plain=true" >> $HGRCPATH $ mkdir sandbox $ (cd sandbox ; runtest) adding a % qnew should refuse bad patch names abort: "series" cannot be used as the name of a patch abort: "status" cannot be used as the name of a patch abort: "guards" cannot be used as the name of a patch abort: "." cannot be used as the name of a patch abort: ".." cannot be used as the name of a patch abort: patch name cannot begin with ".hg" abort: patch name cannot begin with ".mq" abort: '#' cannot be used in the name of a patch abort: ':' cannot be used in the name of a patch abort: '\n' cannot be used in the name of a patch % qnew with name containing slash abort: path ends in directory separator: foo/ (glob) abort: "foo" already exists as a directory foo/bar.patch popping foo/bar.patch patch queue now empty % qnew with uncommitted changes uncommitted.patch % qnew implies add A .hgignore A series A uncommitted.patch % qnew missing abort: missing: * (glob) % qnew -m foo bar % qnew twice abort: patch "first.patch" already exists abort: patch "first.patch" already exists % qnew -f from a subdirectory popping first.patch popping mtest.patch popping uncommitted.patch patch queue now empty adding d/b M d/b diff --git a/d/b b/d/b --- a/d/b +++ b/d/b @@ -1,1 +1,2 @@ b +b % qnew -u with no username configured From: blue % qnew -e -u with no username configured From: chartreuse % fail when trying to import a merge adding a 1 files updated, 0 files merged, 0 files removed, 0 files unresolved created new head merging a warning: conflicts while merging a! (edit, then use 'hg resolve --mark') 0 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon (no more unresolved files) abort: cannot manage merge changesets $ rm -r sandbox hg headers $ echo "plain=false" >> $HGRCPATH $ mkdir sandbox $ (cd sandbox ; runtest) adding a % qnew should refuse bad patch names abort: "series" cannot be used as the name of a patch abort: "status" cannot be used as the name of a patch abort: "guards" cannot be used as the name of a patch abort: "." cannot be used as the name of a patch abort: ".." cannot be used as the name of a patch abort: patch name cannot begin with ".hg" abort: patch name cannot begin with ".mq" abort: '#' cannot be used in the name of a patch abort: ':' cannot be used in the name of a patch abort: '\n' cannot be used in the name of a patch % qnew with name containing slash abort: path ends in directory separator: foo/ (glob) abort: "foo" already exists as a directory foo/bar.patch popping foo/bar.patch patch queue now empty % qnew with uncommitted changes uncommitted.patch % qnew implies add A .hgignore A series A uncommitted.patch % qnew missing abort: missing: * (glob) % qnew -m # HG changeset patch # Parent foo bar % qnew twice abort: patch "first.patch" already exists abort: patch "first.patch" already exists % qnew -f from a subdirectory popping first.patch popping mtest.patch popping uncommitted.patch patch queue now empty adding d/b M d/b # HG changeset patch # Parent diff --git a/d/b b/d/b --- a/d/b +++ b/d/b @@ -1,1 +1,2 @@ b +b % qnew -u with no username configured # HG changeset patch # User blue # Parent % qnew -e -u with no username configured # HG changeset patch # User chartreuse # Parent % fail when trying to import a merge adding a 1 files updated, 0 files merged, 0 files removed, 0 files unresolved created new head merging a warning: conflicts while merging a! (edit, then use 'hg resolve --mark') 0 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon (no more unresolved files) abort: cannot manage merge changesets $ rm -r sandbox Test saving last-message.txt $ hg init repo $ cd repo $ cat > $TESTTMP/commitfailure.py <<EOF > from mercurial import error > def reposetup(ui, repo): > class commitfailure(repo.__class__): > def commit(self, *args, **kwargs): > raise error.Abort('emulating unexpected abort') > repo.__class__ = commitfailure > EOF $ cat >> .hg/hgrc <<EOF > [extensions] > # this failure occurs before editor invocation > commitfailure = $TESTTMP/commitfailure.py > EOF $ cat > $TESTTMP/editor.sh << EOF > echo "==== before editing" > cat \$1 > echo "====" > echo "test saving last-message.txt" >> \$1 > EOF (test that editor is not invoked before transaction starting) $ rm -f .hg/last-message.txt $ HGEDITOR="sh $TESTTMP/editor.sh" hg qnew -e patch abort: emulating unexpected abort [255] $ test -f .hg/last-message.txt [1] (test that editor is invoked and commit message is saved into "last-message.txt") $ cat >> .hg/hgrc <<EOF > [extensions] > commitfailure = ! > [hooks] > # this failure occurs after editor invocation > pretxncommit.unexpectedabort = false > EOF $ rm -f .hg/last-message.txt $ hg status $ HGEDITOR="sh $TESTTMP/editor.sh" hg qnew -e patch ==== before editing HG: Enter commit message. Lines beginning with 'HG:' are removed. HG: Leave message empty to use default message. HG: -- HG: user: test HG: branch 'default' HG: no files changed ==== note: commit message saved in .hg/last-message.txt transaction abort! rollback completed abort: pretxncommit.unexpectedabort hook exited with status 1 [255] $ cat .hg/last-message.txt test saving last-message.txt $ cat >> .hg/hgrc <<EOF > [hooks] > pretxncommit.unexpectedabort = > EOF #if unix-permissions Test handling default message with the patch filename with tail whitespaces $ cat > $TESTTMP/editor.sh << EOF > echo "==== before editing" > cat \$1 > echo "====" > echo "[mq]: patch " > \$1 > EOF $ rm -f .hg/last-message.txt $ hg status $ HGEDITOR="sh $TESTTMP/editor.sh" hg qnew -e "patch " ==== before editing HG: Enter commit message. Lines beginning with 'HG:' are removed. HG: Leave message empty to use default message. HG: -- HG: user: test HG: branch 'default' HG: no files changed ==== $ cat ".hg/patches/patch " # HG changeset patch # Parent 0000000000000000000000000000000000000000 $ cd .. #endif