Mercurial > hg > mercurial-crew-with-dirclash
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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
===================================================================
author | mason@suse.com |
---|---|
date | Fri, 12 Aug 2005 07:10:21 -0800 |
parents | 5f471a75d607 |
children |
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#!/usr/bin/env python import sys, os from mercurial import hg f = sys.argv[1] r1 = hg.revlog(open, f + ".i", f + ".d") r2 = hg.revlog(open, f + ".i2", f + ".d2") tr = hg.transaction(open, "journal") for i in xrange(r1.count()): n = r1.node(i) p1, p2 = r1.parents(n) l = r1.linkrev(n) t = r1.revision(n) n2 = r2.addrevision(t, tr, l, p1, p2) tr.close() os.rename(f + ".i", f + ".i.old") os.rename(f + ".d", f + ".d.old") os.rename(f + ".i2", f + ".i") os.rename(f + ".d2", f + ".d")