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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Commit 888b7fc causes performance regression"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107939">107939</a>
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<th>Summary</th>
<td>Commit 888b7fc causes performance regression
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>18.1
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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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>medium
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<th>Component</th>
<td>Drivers/Gallium/radeonsi
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>david@lunarg.com
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<th>QA Contact</th>
<td>dri-devel@lists.freedesktop.org
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<p>
<div>
<pre>Our Vulkan regression test suite includes a Vulkan trace of the Sasha Willems
shadowmapping demo. We found that the fps when playing back that trace file had
decreased by about 20%. I narrowed down the performance drop to commit
888b7fc.
I duplicated the performance drop with the demo itself. Without commit 888b7fc,
the demo runs at an average of 3125 fps. With commit 888b7fc, it runs at 2675
fps. This is a performance regression of about 14%. I ran this on a system with
an Intel i5-6600K CPU @ 3.50GHz and an AMD Radeon RX470 graphics card.</pre>
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