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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - MotionMark tests using Date.now() to drive animations don't work under web-page-replay"
href="https://bugs.webkit.org/show_bug.cgi?id=170198">170198</a>
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<th>Summary</th>
<td>MotionMark tests using Date.now() to drive animations don't work under web-page-replay
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<th>Product</th>
<td>WebKit
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>Normal
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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>vmiura@chromium.org
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<th>CC</th>
<td>lforschler@apple.com
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<pre>A number of the MotionMark tests animate properties based on the Date.now() value. This is via utility methods Stage.dateCounterValue() or Stage.dateFractionalValue().
Chromium's web-page-replay stubs out Date.now() to improve page replay determinism, and this breaks the animation progression on some of the tests.
Would it make sense to replace the Data.now() usage with consistent use of the Benchmark.timestamp()?</pre>
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