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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Regression(r361953): thinlto links take 3-4x as long as before"
href="https://bugs.llvm.org/show_bug.cgi?id=42210">42210</a>
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<th>Summary</th>
<td>Regression(r361953): thinlto links take 3-4x as long as before
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Support Libraries
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>nicolasweber@gmx.de
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>In Chromium, our builds using thinlto went from ~90 min to timing out after 4h
after r972373. This is because verifying all IR types is very expensive
apparently, see <a href="https://crbug.com/972373">https://crbug.com/972373</a> <a href="show_bug.cgi?id=42210#c15">comment 15</a>.
See <a href="show_bug.cgi?id=42210#c16">comment 16</a> for a repro case, but I'm guessing you can repro by linking any
larger executable with thinlto.</pre>
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