[foreign-memaccess+abi] RFR: Add benchmark

[Maurizio Cimadamore]

On Fri, 16 Dec 2022 12:35:23 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposed to add a new benchmark outlining potential performance gains with the FFM API in internal JDK classes.

Looks good!

test/micro/org/openjdk/bench/java/lang/foreign/MemorySegmentVsBits.java line 2:

> 1: /*
> 2:  * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.

Nit: should this be 2022?

test/micro/org/openjdk/bench/java/lang/foreign/MemorySegmentVsBits.java line 100:

> 98:     @Benchmark
> 99:     public void panamaHeap() {
> 100:         //         for (int i = 0, o = 0; i < size; i++, o += 8) {

Should we drop this line?

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Marked as reviewed by mcimadamore (Committer).

PR: https://git.openjdk.org/panama-foreign/pull/761