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<base href="https://bugs.webkit.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - MotionMark / Animometer gives miss-leading results on browsers with prefixed CSS Transforms"
href="https://bugs.webkit.org/show_bug.cgi?id=166055">166055</a>
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<th>Summary</th>
<td>MotionMark / Animometer gives miss-leading results on browsers with prefixed CSS Transforms
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Nightly Build
</td>
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>Tools / Tests
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>clopez@igalia.com
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<th>CC</th>
<td>lforschler@apple.com
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</tr></table>
<p>
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<pre>I was bisecting an issue that was reported to us related to WebKitGTK+ 2.8 obtaining much better results in MotionMark <<a href="http://browserbench.org/MotionMark/">http://browserbench.org/MotionMark/</a>> than WebKitGTK+ 2.14.
The issue ended being that WebKitGTK+ 2.8 shipped with prefixed CSS Transforms and >= 2.10 shipped with un-prefixed ones.
Meanwhile MotionMark seems to only support the un-prefixed version of the CSS Transforms.
This are the results of WebKitGTK on a laptop on a WebKit build at:
WebKit r181832:
Animometer:Score:Geometric: 136pt
Canvas Arcs:Score: 233pt
Canvas Lines:Score: 822pt
Design:Score: 62.8pt
Focus:Score: 101pt
Images:Score: 1.00pt
Leaves:Score: 213pt
Multiply:Score: 369pt
Paths:Score: 832pt
Suits:Score: 203pt
WebKit r181831:
Animometer:Score:Geometric: 373pt
Canvas Arcs:Score: 240pt
Canvas Lines:Score: 916pt
Design:Score: 76.8pt
Focus:Score: 46.4pt
Images:Score: 220pt
Leaves:Score: 8490pt
Multiply:Score: 579pt
Paths:Score: 853pt
Suits:Score: 195pt
On r181832 <<a href="https://trac.webkit.org/changeset/181832">https://trac.webkit.org/changeset/181832</a>> which is the revision that removes the prefix for CSS Transforms, all animations are shown correctly.
On r181831 the result is clearly miss-leading. The third animation and the animation with the letters "design" are not correctly shown on the screen.
But the result given to the user is much better.
I think MotionMark/Animometer needs to either:
* Gain compatibility with old browsers still using prefixed CSS transforms.
* Be more robust and detect that the animations are actually not happening as expected, therefore it shouldn't increment the performance counter as it does.</pre>
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