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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - B3::fixSSA() has problems in Octane/regexp"
   href="https://bugs.webkit.org/show_bug.cgi?id=154828">154828</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>B3::fixSSA() has problems in Octane/regexp
          </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>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </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>JavaScriptCore
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>fpizlo&#64;apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Usually you know that everything is OK when the compiler spends 95% of its time in IRC.  But in Octane/regexp, this is not the case!  We spent lots of time in fixSSA() instead.  That usually means a scalability problem in that phase.

I've known for a while now that our SSA conversion has scalability problems, and it looks like we're now seeing this.

Note: I don't think that this is actually bottlenecking Octane/regexp performance.  So it's not a high priority right now.</pre>
        </div>
      </p>
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