[foreign-memaccess] RFR: Add benchmark for floating point memory access var handle performance

[Paul Sandoz]

On Wed, 28 Oct 2020 18:06:57 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> This patch adds a benchmark which reproduces the issue discovered by Antoine:
> 
> https://mail.openjdk.java.net/pipermail/panama-dev/2020-September/010869.html

Marked as reviewed by psandoz (Committer).

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PR: https://git.openjdk.java.net/panama-foreign/pull/386