title: Hash table in MappedByteBuffer
body: <p>I hash strings with FNV into integers. I store them in a custom hash table in MappedByteBuffer to hopefully improve memory access over the same table in the heap memory and also provide consistent storage of the table to the file if the program breaks. Is it possible that such off-heap MappedByteBuffer outperforms heap based hash table in terms of speed? JDK HashMap was too slow.</p>