Mercurial > hg

view contrib/macosx/Readme.html @ 26945:8a256cee72c8 stable

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
tags: create new sortdict for performance reasons sortdict internally maintains a list of keys in insertion order. When a key is replaced via __setitem__, we .remove() from this list. This involves a linear scan and array adjustment. This is an expensive operation. The tags reading code was calling into sortdict.__setitem__ for each tag in a read .hgtags revision. For repositories with thousands of tags or thousands of .hgtags revisions, the overhead from list.remove() noticeable. This patch creates a new sortdict() so __setitem__ calls don't incur a list.remove. This doesn't appear to have any performance impact on my Firefox repository. But that's only because tags reading doesn't show up in profiles to begin with. I'm still waiting to hear from a user with over 10,000 tags and hundreds of heads on the impact of this patch.
author Gregory Szorc <gregory.szorc@gmail.com>
date Thu, 12 Nov 2015 13:16:04 -0800
parents 4b0fc75f9403
children 2fd3549c8a5f
line wrap: on
line source

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<!-- This is the second screen displayed during the install. -->
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <meta http-equiv="Content-Style-Type" content="text/css">
  <title>Read Me - Important Information</title>
  <style type="text/css">
    p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Helvetica}
    p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px}
    p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica}
    p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; color: #000fed}
    span.s1 {text-decoration: underline}
    span.s2 {font: 12.0px Courier}
  </style>
</head>
<body>
<p class="p1"><b>Before you install</b></p>
<p class="p2"><br></p>
<p class="p3">This is an OS X version of Mercurial that depends on the default Python installation.</p>
<p class="p2"><br></p>
<p class="p1"><b>After you install</b></p>
<p class="p2"><br></p>
<p class="p3">This package installs the <span class="s2">hg</span> executable as <span class="s2">/usr/local/bin/hg</span>. See <span class="s2">hg debuginstall</span> for more info on file locations.</p>
<p class="p2"><br></p>
<p class="p1"><b>Documentation</b></p>
<p class="p2"><br></p>
<p class="p3">Visit the <a href="https://mercurial-scm.org/">Mercurial web site and wiki</a></p>
<p class="p2"><br></p>
<p class="p3">There's also a free book, <a href="http://hgbook.red-bean.com/">Distributed revision control with Mercurial</a></p>
<p class="p2"><br></p>
<p class="p1"><b>Reporting problems</b></p>
<p class="p2"><br></p>
<p class="p3">If you run into any problems, please file a bug online:</p>
<p class="p3"><a href="http://bz.selenic.com/">http://bz.selenic.com/</a></p>
</body>
</html>