code: public void statistics(PrintWriter wtr)
    {
      int truePessimisticGets = pessimisticGets - puntsDueToCache;
      wtr.println(
        "Exact puts: "
          + exactPuts
          + ", Wildcard generation: "
          + matchTreeGeneration
          + ", Wildcard puts: "
          + wildPuts
          + ", Wildcard-Cache-hit gets: "
          + wildCacheHitGets
          + ", Wildcard-Cache-miss gets: "
          + wildCacheMissGets
          + ", Result-Cache-hit gets: "
          + resultCacheHitGets
          + ", Exact matches: "
          + exactMatches
          + ", Results cached: "
          + resultsCached
          + ", Removals:"
          + removals
          + ", Cache entries created:"
          + cacheCreates
          + ", Cache entries removed:"
          + cacheRemoves
          + ", Optimistic gets:"
          + optimisticGets
          + ", True Pessimistic gets:"
          + truePessimisticGets
          + ", Mutating gets:"
          + puntsDueToCache);
    }
docs: Only used when doing isolated performance testing of the MatchSpace.