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<html lang="en-us">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>V8 profile log plotter</title>
<link rel="stylesheet" type="text/css" href="profviz.css">
<script src="profviz.js"></script>
</head>
<body onload="onload()">
<div id="content">
<img src="" id="plot" type="image/svg+xml" class="display"
width="1200" height="600" class="float-right"/>
<textarea id="prof" class="display" disabled=true></textarea>
<br/>
<table width="1200">
<tr>
<td width="330">
<button id="start" onclick="start()">
Start
</button>
<button id="reset" onclick="ui.reset(); worker.reset();">
Reset
</button>
<button id="toggledisplay" onclick="ui.toggle();">
Show profile
</button>
</td>
<td width="220">
<input type="file" id="file" onchange="ui.reset();"/>
</td>
<td width="300">
<label title="You can manually choose the range
to plot only part of the log file.">
<span class="tooltip">Range</span>:
</label>
<input type="text" id="range_start" class="range"/>
<label>to</label>
<input type="text" id="range_end" class="range"/>
</td>
<td width="350">
<label title="We model profiling overhead by accounting a constant
execution delay to each log entry. Adjust to better suit
your computer's performance.">
<span class="tooltip">Delay per log entry</span>:
</label>
<input type="text" id="distortion" class="range" value="4500"/>
<label>picoseconds</label>
</td>
</tr>
</table>
<br/>
<textarea class="log" id="log" rows="8" disabled=true></textarea>
<div class="text">
<h1>
<a href="javascript:ui.info('instructions');" class="unroll">
Instructions
</a>
</h1>
<div id="instructions">
<ol>
<li>
Run V8 with
<span class="tt">--prof --log-timer-events</span>,
or alternatively,<br/>
Chrome with
<span class="tt">
--no-sandbox --js-flags="--prof --log-timer-events"
</span> to produce <span class="tt">v8.log</span>.
</li>
<li>
Open
<span class="tt">v8.log</span>
on this page. Don't worry, it won't be uploaded anywhere.
</li>
<li>
Click "Start" to start number crunching. This will take a while.
</li>
<li>
Click "Show plot/profile" to switch between the statistical profile and
the timeline plot.<br/>
C++ items are missing in the statistical profile because symbol
information is not available.<br>
Consider using the
<a href="https://code.google.com/p/v8/wiki/V8Profiler">
command-line utility
</a> instead.
</li>
</ol>
If you expect multiple V8 instances to run concurrently, for example
with several tabs in Chrome,<br/>
add the V8 flag <span class="tt">--logfile=v8.%p.log</span>
so that each instance writes to its own log file.
</div>
</div>
<div class="text">
<h1>
<a href="javascript:ui.info('credits');" class="unroll">
Credits
</a>
</h1>
<div id="credits">
<ul>
<li>
Christian Huettig for the
<a href="http://gnuplot.respawned.com/">Javascript port</a>
of Gnuplot 4.6.3.
</li>
<li>
The
<a href="https://github.com/kripken/emscripten">Emscripten compiler</a>
that made the port possible.
</li>
<li>
The <a href="http://www.gnuplot.info/">Gnuplot project</a>.
</li>
<li>
The <a href="https://developers.google.com/v8/">V8 project</a>.
</li>
</ul>
</div>
</div>
</div>
</body>
</html>