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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [Content Extensions] Use less memory for CombinedURLFilters"
   href="https://bugs.webkit.org/show_bug.cgi?id=144290">144290</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[Content Extensions] Use less memory for CombinedURLFilters
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>528+ (Nightly build)
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </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>WebCore Misc.
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>achristensen&#64;apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The prefix tree uses too much memory.  Let's make it use less memory by using Vectors instead of HashTables, assuming the Vectors stay small because we still need to search through them.</pre>
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