[foreign-memaccess+abi] RFR: Improve performance of Arena::allocateFrom

[Sergey Bylokhov]

On Thu, 3 Aug 2023 16:27:41 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>Note that MallocArena is still significantly faster than UnsafeArena

This is interesting, is it possible that memset via panama could be faster than "UNSAFE.setMemory"?

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PR Comment: https://git.openjdk.org/panama-foreign/pull/855#issuecomment-1664967525