<html>
<head>
<base href="https://bugs.webkit.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - marquee with "truespeed" animates at > 60fps, hogging CPU"
href="https://bugs.webkit.org/show_bug.cgi?id=160609">160609</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>marquee with "truespeed" animates at > 60fps, hogging CPU
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>WebKit Nightly Build
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>Layout and Rendering
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>simon.fraser@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>simon.fraser@apple.com
</td>
</tr></table>
<p>
<div>
<pre>LayoutTests/fast/html/marquee-scroll.html shows a problem where a marquee like:
<marquee width="50%" behavior="slide" bgcolor="cyan" truespeed="" scrollDelay="0">
triggers animation with a zero-delay timer, which is way faster than 60fps and eats CPU.
It's also notable that the test fails to animate the marquee at all, yet still triggers massive numbers of repaints.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>