upstream/mercurial-mirror Files · tests/test-revlog-mmapindex.t

bookmarks: cache reverse mapping (issue5868)...

bookmarks: cache reverse mapping (issue5868) I chose a simpler implementation. If the initial cost of building reverse mapping is significant, we'll have to move it under @propertycache. The nodemap could be a dict of sets, but I think keeping a sorted list is better since each node is likely to have zero/one bookmark. Micro-benchmark with 1001 bookmarks and 1001 revisions: $ for n in `seq 0 1000`; do touch $n; hg book book$n; hg ci -qAm$n; done $ hg bookmarks --time > /dev/null (orig) time: real 0.040 secs (user 0.050+0.000 sys 0.000+0.000) (new) time: real 0.040 secs (user 0.040+0.000 sys 0.010+0.000) $ hg log -T '{bookmarks}\n' --time > /dev/null (orig) time: real 0.160 secs (user 0.160+0.000 sys 0.000+0.000) (new) time: real 0.090 secs (user 0.100+0.000 sys 0.000+0.000)

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      create verbosemmap.py

        $ cat << EOF > verbosemmap.py

        > # extension to make util.mmapread verbose

        > 

        > from __future__ import absolute_import

        > 

        > from mercurial import (

        >     extensions,

        >     pycompat,

        >     util,

        > )

        > 

        > def extsetup(ui):

        >     def mmapread(orig, fp):

        >         ui.write(b"mmapping %s\n" % pycompat.bytestr(fp.name))

        >         ui.flush()

        >         return orig(fp)

        > 

        >     extensions.wrapfunction(util, 'mmapread', mmapread)

        > EOF

      setting up base repo

        $ hg init a

        $ cd a

        $ touch a

        $ hg add a

        $ hg commit -qm base

        $ for i in `$TESTDIR/seq.py 1 100` ; do

        > echo $i > a

        > hg commit -qm $i

        > done

      set up verbosemmap extension

        $ cat << EOF >> $HGRCPATH

        > [extensions]

        > verbosemmap=$TESTTMP/verbosemmap.py

        > EOF

      mmap index which is now more than 4k long

        $ hg log -l 5 -T '{rev}\n' --config experimental.mmapindexthreshold=4k

        mmapping $TESTTMP/a/.hg/store/00changelog.i

        100

        99

        98

        97

        96

      do not mmap index which is still less than 32k

        $ hg log -l 5 -T '{rev}\n' --config experimental.mmapindexthreshold=32k

        100

        99

        98

        97

        96

        $ cd ..

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				create verbosemmap.py
				$ cat << EOF > verbosemmap.py
				> # extension to make util.mmapread verbose
				>
				> from __future__ import absolute_import
				>
				> from mercurial import (
				> extensions,
				> pycompat,
				> util,
				> )
				>
				> def extsetup(ui):
				> def mmapread(orig, fp):
				> ui.write(b"mmapping %s\n" % pycompat.bytestr(fp.name))
				> ui.flush()
				> return orig(fp)
				>
				> extensions.wrapfunction(util, 'mmapread', mmapread)
				> EOF

				setting up base repo
				$ hg init a
				$ cd a
				$ touch a
				$ hg add a
				$ hg commit -qm base
				$ for i in `$TESTDIR/seq.py 1 100` ; do
				> echo $i > a
				> hg commit -qm $i
				> done

				set up verbosemmap extension
				$ cat << EOF >> $HGRCPATH
				> [extensions]
				> verbosemmap=$TESTTMP/verbosemmap.py
				> EOF

				mmap index which is now more than 4k long
				$ hg log -l 5 -T '{rev}\n' --config experimental.mmapindexthreshold=4k
				mmapping $TESTTMP/a/.hg/store/00changelog.i
				100
				99
				98
				97
				96

				do not mmap index which is still less than 32k
				$ hg log -l 5 -T '{rev}\n' --config experimental.mmapindexthreshold=32k
				100
				99
				98
				97
				96

				$ cd ..