It says to remove it, so why not?

src/mlpack/methods/rann/ra_search_rules.hpp

@@ -225,7 +225,6 @@ class RASearchRules
                  const double oldScore);
 
 
-  size_t NumDistComputations() { return numDistComputations; }
   size_t NumEffectiveSamples()
   {
     if (numSamplesMade.n_elem == 0)
@@ -270,27 +269,24 @@ class RASearchRules
   //! The instantiated metric.
   MetricType& metric;
 
-  //! Whether to sample at leaves or just use all of it
+  //! Whether to sample at leaves or just use all of it.
   bool sampleAtLeaves;
 
-  //! Whether to do exact computation on the first leaf before any sampling
+  //! Whether to do exact computation on the first leaf before any sampling.
   bool firstLeafExact;
 
-  //! The limit on the largest node that can be approximated by sampling
+  //! The limit on the largest node that can be approximated by sampling.
   size_t singleSampleLimit;
 
-  //! The minimum number of samples required per query
+  //! The minimum number of samples required per query.
   size_t numSamplesReqd;
 
-  //! The number of samples made for every query
+  //! The number of samples made for every query.
   arma::Col<size_t> numSamplesMade;
 
-  //! The sampling ratio
+  //! The sampling ratio.
   double samplingRatio;
 
-  // TO REMOVE: just for testing
-  size_t numDistComputations;
-
   //! If the query and reference set are identical, this is true.
   bool sameSet;
 

src/mlpack/methods/rann/ra_search_rules_impl.hpp

@@ -64,7 +64,6 @@ RASearchRules(const arma::mat& referenceSet,
 
   // Initialize some statistics to be collected during the search.
   numSamplesMade = arma::zeros<arma::Col<size_t> >(querySet.n_cols);
-  numDistComputations = 0;
   samplingRatio = (double) numSamplesReqd / (double) n;
 
   Log::Info << "Minimum samples required per query: " << numSamplesReqd <<
@@ -135,9 +134,6 @@ double RASearchRules<SortPolicy, MetricType, TreeType>::BaseCase(
 
   numSamplesMade[queryIndex]++;
 
-  // TO REMOVE
-  numDistComputations++;
-
   return distance;
 }