ew enough to support arguments to
<code>--prune</code>, use <code>git repack -ad; git prune</code> instead).</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="PERFORMANCE">PERFORMANCE</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The performance of git-filter-branch is glacially slow; its design makes it
impossible for a backward-compatible implementation to ever be fast:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>In editing files, git-filter-branch by design checks out each and
