--- old/src/hotspot/share/utilities/concurrentHashTable.hpp	2019-05-02 12:06:54.000000000 -0500
+++ new/src/hotspot/share/utilities/concurrentHashTable.hpp	2019-05-02 12:06:54.000000000 -0500
@@ -28,6 +28,7 @@
 #include "memory/allocation.hpp"
 #include "utilities/globalCounter.hpp"
 #include "utilities/globalDefinitions.hpp"
+#include "utilities/tableStatistics.hpp"
 
 // A mostly concurrent-hash-table where the read-side is wait-free, inserts are
 // CAS and deletes mutual exclude each other on per bucket-basis. VALUE is the
@@ -380,6 +381,8 @@
 
   ~ConcurrentHashTable();
 
+  TableRateStatistics _stats_rate;
+
   size_t get_size_log2(Thread* thread);
   size_t get_node_size() const { return sizeof(Node); }
   bool is_max_size_reached() { return _size_limit_reached; }
@@ -454,6 +457,15 @@
   template <typename EVALUATE_FUNC, typename DELETE_FUNC>
   void bulk_delete(Thread* thread, EVALUATE_FUNC& eval_f, DELETE_FUNC& del_f);
 
+  // Calcuate statistics. Item sizes are calculated with VALUE_SIZE_FUNC.
+  template <typename VALUE_SIZE_FUNC>
+  TableStatistics statistics_calculate(Thread* thread, VALUE_SIZE_FUNC& vs_f);
+
+  // Gets statistics if available, if not return old one. Item sizes are calculated with
+  // VALUE_SIZE_FUNC.
+  template <typename VALUE_SIZE_FUNC>
+  TableStatistics statistics_get(Thread* thread, VALUE_SIZE_FUNC& vs_f, TableStatistics old);
+
   // Writes statistics to the outputStream. Item sizes are calculated with
   // VALUE_SIZE_FUNC.
   template <typename VALUE_SIZE_FUNC>