dirstate walking optimizations The repo walking code introduces a number of calls to dirstate.map.copy(), significantly slowing down the walk on large trees. When a list of files is passed to the walking code, we should only look at map entries relevant to the file list passed in. dirstate.filterfiles() is added to return a subset of the dirstate map. The subset includes in files passed in, and if one of the files requested is actually a directory, it includes any files inside that directory tree. This brings the time for hg diff Makefile down from 1.7s to .3s on a linux kernel repo. Also, the diff command was unconditionally calling makewalk, leading to an extra pass through repo.changes. This patch avoids the call to makewalk when commands.diff isn't given a list of patterns, cutting the time for hg diff (with no args) in half. Index: mine/mercurial/hg.py ===================================================================

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include hg

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recursive-include mercurial *.py

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include hgweb.cgi

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include hgeditor rewrite-log

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include tests/README tests/run-tests tests/test-*[a-z0-9] tests/*.out

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prune tests/*.err

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include *.txt

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include templates/map templates/map-*[a-z0-9]

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include templates/*.tmpl

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include doc/README doc/*.txt doc/Makefile

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recursive-include contrib *

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include README

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include CONTRIBUTORS

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include COPYING

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include TODO

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include MANIFEST.in