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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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      #require execbit

        $ hg init

        $ echo a > a

        $ hg ci -Am'not executable'

        adding a

        $ chmod +x a

        $ hg ci -m'executable'

        $ hg id

        79abf14474dc tip

      Make sure we notice the change of mode if the cached size == -1:

        $ hg rm a

        $ hg revert -r 0 a

        $ hg debugstate

        n   0         -1 unset               a

        $ hg status

        M a

        $ hg up 0

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ hg id

        d69afc33ff8a

        $ test -x a && echo executable -- bad || echo not executable -- good

        not executable -- good

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				#require execbit

				$ hg init
				$ echo a > a
				$ hg ci -Am'not executable'
				adding a

				$ chmod +x a
				$ hg ci -m'executable'
				$ hg id
				79abf14474dc tip

				Make sure we notice the change of mode if the cached size == -1:

				$ hg rm a
				$ hg revert -r 0 a
				$ hg debugstate
				n 0 -1 unset a
				$ hg status
				M a

				$ hg up 0
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved
				$ hg id
				d69afc33ff8a
				$ test -x a && echo executable -- bad \|\| echo not executable -- good
				not executable -- good