<p>In <a href="https://github.com/mlpack/mlpack/pull/747#discussion_r75186875">src/mlpack/methods/neighbor_search/neighbor_search_rules_impl.hpp</a>:</p>
<pre style='color:#555'>&gt; @@ -375,6 +375,9 @@ inline double NeighborSearchRules&lt;SortPolicy, MetricType, TreeType&gt;::Rescore(
&gt;    if (oldScore == DBL_MAX)
&gt;      return oldScore;
&gt;  
&gt; +  if (oldScore == SortPolicy::BestDistance())
&gt; +    return oldScore;
</pre>
<p><a href="https://github.com/rcurtin" class="user-mention">@rcurtin</a> <br>
Yes, I completely agree. I added this modification to avoid calculating the bounds as there is no possibility of prunning when score is <code>0</code>. I agree that it would be possible to prune when score is 0, but we can't because of <code>B_2()</code>.<br>
Updated the code in : <a href="https://github.com/mlpack/mlpack/pull/747/commits/e4cf1fd252b710809654515dccc30a299d0380e2" class="commit-link"><tt>e4cf1fd</tt></a></p>

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