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obsstore: disable garbage collection during initialization (issue4456) Python garbage collection is triggered by container creation. So code that creates a lot of tuples tends to trigger GC a lot. We disable the gc during obsolescence marker parsing and associated initialization. This provides an interesting speedup (25%). Load marker function on my 58758 markers repo: before: 0.468247 seconds after: 0.344362 seconds The benefit is a bit less visible overall. With python2.6 on my system I see: after: 0.60 before: 0.53 The difference is probably explained by the delaying of a costly GC. (but there is still a win). Marking involved tuples, lists and dicts as ignorable by the garbage collector should give us more benefit. But this is another adventure. Thanks goes to Siddharth Agarwal for the lead.
author Pierre-Yves David <pierre-yves.david@fb.com>
date Wed, 26 Nov 2014 16:58:31 -0800
parents 43cfad930d38
children 70cfa7e1611b
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{header}
<title>{repo|escape}: revision graph</title>
<link rel="alternate" type="application/atom+xml"
   href="{url|urlescape}atom-log" title="Atom feed for {repo|escape}: log" />
<link rel="alternate" type="application/rss+xml"
   href="{url|urlescape}rss-log" title="RSS feed for {repo|escape}: log" />
<!--[if IE]><script type="text/javascript" src="{staticurl|urlescape}excanvas.js"></script><![endif]-->
</head>
<body>

<div class="container">
<div class="menu">
<div class="logo">
<a href="{logourl}">
<img src="{staticurl|urlescape}{logoimg}" alt="mercurial" /></a>
</div>
<ul>
<li><a href="{url|urlescape}shortlog/{node|short}{sessionvars%urlparameter}">log</a></li>
<li class="active">graph</li>
<li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
<li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
<li><a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a></li>
</ul>
<ul>
<li><a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">changeset</a></li>
<li><a href="{url|urlescape}file/{node|short}{path|urlescape}{sessionvars%urlparameter}">browse</a></li>
</ul>
<ul>
 <li><a href="{url|urlescape}help{sessionvars%urlparameter}">help</a></li>
</ul>
<p>
<div class="atom-logo">
<a href="{url|urlescape}atom-log" title="subscribe to atom feed">
<img class="atom-logo" src="{staticurl|urlescape}feed-icon-14x14.png" alt="atom feed">
</a>
</div>
</div>

<div class="main">
<h2 class="breadcrumb"><a href="/">Mercurial</a> {pathdef%breadcrumb}</h2>
<h3>graph</h3>

<form class="search" action="{url|urlescape}log">
{sessionvars%hiddenformentry}
<p><input name="rev" id="search1" type="text" size="30" /></p>
<div id="hint">{searchhint}</div>
</form>

<div class="navigate">
<a href="{url|urlescape}graph/{rev}{lessvars%urlparameter}">less</a>
<a href="{url|urlescape}graph/{rev}{morevars%urlparameter}">more</a>
| rev {rev}: {changenav%navgraph}
</div>

<noscript><p>The revision graph only works with JavaScript-enabled browsers.</p></noscript>

<div id="wrapper">
<ul id="nodebgs" class="stripes2"></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"></li>';
	var left = (this.bg_height - this.box_size) + (this.columns + 1) * this.box_size;
	var nstyle = 'padding-left: ' + left + 'px;';

	var tagspan = '';
	if (cur[7].length || cur[8].length || (cur[6][0] != 'default' || cur[6][1])) \{
		tagspan = '<span class="logtags">';
		if (cur[6][1]) \{
			tagspan += '<span class="branchhead" title="' + cur[6][0] + '">';
			tagspan += cur[6][0] + '</span> ';
		} else if (!cur[6][1] && cur[6][0] != 'default') \{
			tagspan += '<span class="branchname" title="' + cur[6][0] + '">';
			tagspan += cur[6][0] + '</span> ';
		}
		if (cur[7].length) \{
			for (var t in cur[7]) \{
				var tag = cur[7][t];
				tagspan += '<span class="tag">' + tag + '</span> ';
			}
		}
		if (cur[8].length) \{
			for (var b in cur[8]) \{
				var bookmark = cur[8][b];
				tagspan += '<span class="tag">' + bookmark + '</span> ';
			}
		}
		tagspan += '</span>';
	}

	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>' + tagspan + '<span class="info">' + cur[5] + ', by ' + cur[4] + '</span></li>';
	
	return [bg, item];
	
}

graph.render(data);

// stop hiding script -->
</script>

<div class="navigate">
<a href="{url|urlescape}graph/{rev}{lessvars%urlparameter}">less</a>
<a href="{url|urlescape}graph/{rev}{morevars%urlparameter}">more</a>
| rev {rev}: {changenav%navgraph}
</div>

<script type="text/javascript">
    ajaxScrollInit(
            '{url|urlescape}graph/{rev}?revcount=%next%&style={style}',
            {revcount}+60,
            function (htmlText, previousVal) \{ return previousVal + 60; },
            '#wrapper',
            '<div class="%class%" style="text-align: center;">%text%</div>',
            'graph'
    );
</script>

</div>
</div>

{footer}