 and Optimizations</a>
  </li>
  <li data-type="sect2">
    <a href="ch09.html#bug_fixes_and_rollbacks">Bug Fixes and Rollbacks</a>
  </li>
  <li data-type="sect2">
    <a href="ch09.html#refactorings_and_large-scale_changes">Refactorings and Large-Scale Changes</a>
  </li>
</ol>
      </li>
  <li data-type="sect1">
    <a href="ch09.html#conclusion-id00013">Conclusion</a>
            <ol>
</ol>
      </li>
  <li data-type="sect1">
    <a href="ch09.html#tlsemicolondrs-id00110">TL;DRs</a>
            <ol>
<