leerho commented on issue #731:
URL: 
https://github.com/apache/datasketches-java/issues/731#issuecomment-4607838999

   @blacelle, 
   I don't think you understood my question:
   "You say you have no compile or runtime operations with DS-java 8.X on Java 
21. Have you tried any off-heap or file-mapped memory operations using 
MemorySegments?"
   
   DataSketches-java versions 7.X and 8.X provide the ability to perform / 
store your sketches off-heap.  In order to do that you have to use one of the 
constructors that take a Memory object.  Underneath the covers that Memory 
object leverages the "preview" FFM (MemorySegments) features of Java 21.  Since 
those preview features are no longer available, your project will likely fail.  
If you don't care about using off-heap memory, you will be OK.


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