anchor.diff:           {tree_nodesCompared, TNC},
            {tree_leavesSynced, TLS},
            {tree_compareSkipped, TCS},
  -         {error_count, EC},
            {build_time, BT},
            {recon_time, RC},
            {resolve_started, RS},
  
positive.code:          tree_nodesCompared = 0       :: non_neg_integer(),
           tree_compareSkipped= 0       :: non_neg_integer(),
           tree_leavesSynced  = 0       :: non_neg_integer(),
           error_count        = 0       :: non_neg_integer(),
           build_time         = 0       :: non_neg_integer(),      %in us
           recon_time         = 0       :: non_neg_integer(),      %in us
           resolve_started    = 0       :: non_neg_integer(),      %number of resolve requests send
  
negative.code:              tree_nodesCompared  -> Stats#rr_recon_stats{tree_nodesCompared = V};
               tree_leavesSynced   -> Stats#rr_recon_stats{tree_leavesSynced = V};
               tree_compareSkipped -> Stats#rr_recon_stats{tree_compareSkipped = V};
               build_time          -> Stats#rr_recon_stats{build_time = V};
               recon_time          -> Stats#rr_recon_stats{recon_time = V};
               resolve_started     -> Stats#rr_recon_stats{resolve_started = V};
  