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pycompat: export queue module instead of symbols in module (API)...

pycompat: export queue module instead of symbols in module (API) Previously, pycompat and util re-exported individual symbols from the queue module. This had the side-effect of forcing the loading of the queue module whenever pycompat/util was imported. These symbols aren't used very often. So importing the module to get a handle on the symbols is wasteful. This commit changes pycompat so it no longer exports the individual symbols in the queue module. Instead, we make the imported module a "public" symbol. We drop the individual symbol aliases from the util module. All consumers are updated to use pycompat.queue.* instead. This change makes 300 invocations of `hg log -r. -T '{rev}\n'` a little faster: before: 18.44s after: 17.87s Differential Revision: https://phab.mercurial-scm.org/D3441

Gregory Szorc - - Load All Authors

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      Just exercise debugindexdot

      Create a short file history including a merge.

        $ hg init t

        $ cd t

        $ echo a > a

        $ hg ci -qAm t1 -d '0 0'

        $ echo a >> a

        $ hg ci -m t2 -d '1 0'

        $ hg up -qC 0

        $ echo b >> a

        $ hg ci -m t3 -d '2 0'

        created new head

        $ HGMERGE=true hg merge -q

        $ hg ci -m merge -d '3 0'

        $ hg debugindexdot a

        digraph G {

        	-1 -> 0

        	0 -> 1

        	0 -> 2

        	2 -> 3

        	1 -> 3

        }

        $ cd ..

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				Just exercise debugindexdot
				Create a short file history including a merge.
				$ hg init t
				$ cd t
				$ echo a > a
				$ hg ci -qAm t1 -d '0 0'
				$ echo a >> a
				$ hg ci -m t2 -d '1 0'
				$ hg up -qC 0
				$ echo b >> a
				$ hg ci -m t3 -d '2 0'
				created new head
				$ HGMERGE=true hg merge -q
				$ hg ci -m merge -d '3 0'

				$ hg debugindexdot a
				digraph G {
				-1 -> 0
				0 -> 1
				0 -> 2
				2 -> 3
				1 -> 3
				}

				$ cd ..