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src/hotspot/share/utilities/hashtable.cpp

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@@ -85,11 +85,13 @@
   entry->set_literal(obj);
   return entry;
 }
 
 // Version of hashtable entry allocation that allocates in the C heap directly.
-// The allocator in blocks is preferable but doesn't have free semantics.
+// The block allocator in BasicHashtable has less fragmentation, but the memory is not freed until
+// the whole table is freed. Use allocate_new_entry() if you want to individually free the memory
+// used by each entry
 template <class T, MEMFLAGS F> HashtableEntry<T, F>* Hashtable<T, F>::allocate_new_entry(unsigned int hashValue, T obj) {
   HashtableEntry<T, F>* entry = (HashtableEntry<T, F>*) NEW_C_HEAP_ARRAY(char, this->entry_size(), F);
 
   entry->set_hash(hashValue);
   entry->set_literal(obj);
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