felipecrv commented on issue #39377:
URL: https://github.com/apache/arrow/issues/39377#issuecomment-1869630247

   Wait... does `Resize` to a size smaller than the capacity of the buffer 
really frees memory?
   
   I wonder if there is something to learn from the zero-copy stream design 
implemented in protocolbuffers
   
   
https://github.com/protocolbuffers/protobuf/blob/main/src/google/protobuf/io/zero_copy_stream.h


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