dy been requested from another peer.</p>
<p>This has the effect of getting more and more aggressive in requesting blocks
the longer it takes to complete the piece. If this mechanism is too aggressive,
a significant amount of bandwidth may be lost in redundant download (keep in
mind the zero-sum game).</p>
<p>It never makes sense to request a block twice from the same peer. There is logic
in place to prevent this.</p>
</div>
<div class="section" id="optimizations">
<h1>optimizations</h1>
<p>One optimization 