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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#!/usr/bin/env python

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#

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# An example CGI script to use hgweb, edit as necessary

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import cgitb, os, sys

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cgitb.enable()

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# sys.path.insert(0, "/path/to/python/lib") # if not a system-wide install

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from mercurial import hgweb

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h = hgweb.hgweb("/path/to/repo", "repository name")

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h.run()