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parsers: inline fields of dirstate values in C version...
parsers: inline fields of dirstate values in C version Previously, while unpacking the dirstate we'd create 3-4 new CPython objects for most dirstate values: - the state is a single character string, which is pooled by CPython - the mode is a new object if it isn't 0 due to being in the lookup set - the size is a new object if it is greater than 255 - the mtime is a new object if it isn't -1 due to being in the lookup set - the tuple to contain them all In some cases such as regular hg status, we actually look at all the objects. In other cases like hg add, hg status for a subdirectory, or hg status with the third-party hgwatchman enabled, we look at almost none of the objects. This patch eliminates most object creation in these cases by defining a custom C struct that is exposed to Python with an interface similar to a tuple. Only when tuple elements are actually requested are the respective objects created. The gains, where they're expected, are significant. The following tests are run against a working copy with over 270,000 files. parse_dirstate becomes significantly faster: $ hg perfdirstate before: wall 0.186437 comb 0.180000 user 0.160000 sys 0.020000 (best of 35) after: wall 0.093158 comb 0.100000 user 0.090000 sys 0.010000 (best of 95) and as a result, several commands benefit: $ time hg status # with hgwatchman enabled before: 0.42s user 0.14s system 99% cpu 0.563 total after: 0.34s user 0.12s system 99% cpu 0.471 total $ time hg add new-file before: 0.85s user 0.18s system 99% cpu 1.033 total after: 0.76s user 0.17s system 99% cpu 0.931 total There is a slight regression in regular status performance, but this is fixed in an upcoming patch.
Thomas Arendsen Hein - - Load All Authors

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graph.tmpl
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{header}
<title>{repo|escape}: graph</title>
<link rel="alternate" type="application/atom+xml"
href="{url|urlescape}atom-tags" title="Atom feed for {repo|escape}: tags">
<link rel="alternate" type="application/rss+xml"
href="{url|urlescape}rss-tags" title="RSS feed for {repo|escape}: tags">
<!--[if IE]><script type="text/javascript" src="{staticurl|urlescape}excanvas.js"></script><![endif]-->
</head>
<body>
<div class="buttons">
<a href="{url|urlescape}log{sessionvars%urlparameter}">changelog</a>
<a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a>
<a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a>
<a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a>
<a href="{url|urlescape}file/{node|short}/{sessionvars%urlparameter}">files</a>
<a href="{url|urlescape}help{sessionvars%urlparameter}">help</a>
</div>
<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / graph</h2>
<form action="{url|urlescape}log">
{sessionvars%hiddenformentry}
<p>
<label for="search1">search:</label>
<input name="rev" id="search1" type="text" size="30">
navigate: <small class="navigate">{changenav%navgraph}</small>
</p>
</form>
<noscript>The revision graph only works with JavaScript-enabled browsers.</noscript>
<div id="wrapper">
<ul id="nodebgs"></ul>
<canvas id="graph" width="480" height="{canvasheight}"></canvas>
<ul id="graphnodes"></ul>
</div>
<script type="text/javascript">
<!-- hide script content
var data = {jsdata|json};
var graph = new Graph();
graph.scale({bg_height});
graph.vertex = function(x, y, color, parity, cur) \{
this.ctx.beginPath();
color = this.setColor(color, 0.25, 0.75);
this.ctx.arc(x, y, radius, 0, Math.PI * 2, true);
this.ctx.fill();
var bg = '<li class="bg parity' + parity + '"></li>';
var left = (this.bg_height - this.box_size) + (this.columns + 1) * this.box_size;
var nstyle = 'padding-left: ' + left + 'px;';
var item = '<li style="' + nstyle + '"><span class="desc">';
item += '<a href="{url|urlescape}rev/' + cur[0] + '{sessionvars%urlparameter}" title="' + cur[0] + '">' + cur[3] + '</a>';
item += '</span><span class="info">' + cur[5] + ', by ' + cur[4] + '</span></li>';
return [bg, item];
}
graph.render(data);
// stop hiding script -->
</script>
<form action="{url|urlescape}log">
{sessionvars%hiddenformentry}
<p>
<label for="search1">search:</label>
<input name="rev" id="search1" type="text" size="30">
navigate: <small class="navigate">{changenav%navgraph}</small>
</p>
</form>
{footer}