'[Webkit-unassigned] [Bug 154828] New: B3::fixSSA() has problems in Octane/regexp'

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List:       webkit-unassigned
Subject:    [Webkit-unassigned] [Bug 154828] New: B3::fixSSA() has problems in Octane/regexp
From:       bugzilla-daemon () webkit ! org
Date:       2016-02-29 19:41:50
Message-ID: bug-154828-2851 () https ! bugs ! webkit ! org/
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Date: Mon, 29 Feb 2016 11:42:24 -0800
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https://bugs.webkit.org/show_bug.cgi?id=154828

            Bug ID: 154828
           Summary: B3::fixSSA() has problems in Octane/regexp
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned@lists.webkit.org
          Reporter: fpizlo@apple.com

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.

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--1456774944.7fCB5FeF3.12102
Date: Mon, 29 Feb 2016 11:42:24 -0800
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<html>
    <head>
      <base href="https://bugs.webkit.org/" />
    </head>
    <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>
      <hr>
      <span>You are receiving this mail because:</span>

      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>
--1456774944.7fCB5FeF3.12102--

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