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
===================================================================
default = "changelog"
header = header.tmpl
footer = footer.tmpl
search = search.tmpl
changelog = changelog.tmpl
naventry = "<a href="?cmd=changelog;rev=#rev#">#label#</a> "
filedifflink = "<a href="?cmd=filediff;node=#node#;file=#file#">#file#</a> "
filenodelink = "<a href="?cmd=file;filenode=#filenode#;file=#file#">#file#</a> "
fileellipses = "..."
changelogentry = changelogentry.tmpl
searchentry = changelogentry.tmpl
changeset = changeset.tmpl
manifest = manifest.tmpl
manifestdirentry = "<tr class="parity#parity#"><td><tt>drwxr-xr-x</tt> <td><a href="?cmd=manifest;manifest=#manifest#;path=#path#">#basename#/</a>"
manifestfileentry = "<tr class="parity#parity#"><td><tt>#permissions|permissions#</tt> <td><a href="?cmd=file;filenode=#filenode#;file=#file#">#basename#</a>"
filerevision = filerevision.tmpl
fileannotate = fileannotate.tmpl
filediff = filediff.tmpl
filelog = filelog.tmpl
fileline = "<div class="parity#parity#"><span class="lineno">#linenumber# </span>#line|escape#</div>"
filelogentry = filelogentry.tmpl
annotateline = "<tr class="parity#parity#"><td class="annotate"><a href="?cmd=changeset;node=#node#">#author|obfuscate#@#rev#</a></td><td><pre>#line|escape#</pre></td></tr>"
difflineplus = "<span class="plusline">#line|escape#</span>"
difflineminus = "<span class="minusline">#line|escape#</span>"
difflineat = "<span class="atline">#line|escape#</span>"
diffline = "#line|escape#"
changelogparent = "<tr><th class="parent">parent #rev#:</th><td class="parent"><a href="?cmd=changeset;node=#node#">#node|short#</a></td></tr>"
changesetparent = "<tr><th class="parent">parent #rev#:</th><td class="parent"><a href="?cmd=changeset;node=#node#">#node|short#</a></td></tr>"
filerevparent = "<tr><td class="metatag">parent:</td><td><a href="?cmd=file;file=#file#;filenode=#node#">#node|short#</a></td></tr>"
fileannotateparent = "<tr><td class="metatag">parent:</td><td><a href="?cmd=annotate;file=#file#;filenode=#node#">#node|short#</a></td></tr>"
tags = tags.tmpl
tagentry = "<li class="tagEntry parity#parity#"><span class="node">#node#</span> <a href="?cmd=changeset;node=#node#">#tag#</a></li>"
diffblock = "<pre class="parity#parity#">#lines#</pre>"
changelogtag = "<tr><th class="tag">tag:</th><td class="tag">#tag#</td></tr>"
changesettag = "<tr><th class="tag">tag:</th><td class="tag">#tag#</td></tr>"
filediffparent = "<tr><th class="parent">parent #rev#:</th><td class="parent"><a href="?cmd=changeset;node=#node#">#node|short#</a></td></tr>"
filelogparent = "<tr><td align="right">parent #rev#: </td><td><a href="?cmd=file;file=#file#;filenode=#node#">#node|short#</a></td></tr>"