RFR: Samples/jmh sample 39 memory access

Wed Oct 12 23:42:01 UTC 2022

I propose this sample because overlooking the memory layout of e.g. ArrayLists can be a pitfall for benchmarks.
This new sample makes users of JMH aware of this problem. It teaches them how to use JMH right.
What do you think?

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Commit messages:
 - Update JMHSample_39_MemoryAccess.java
 - Removed duplicate of copyright banner
 - added sample JMHSample_39_MemoryAccess

Changes: https://git.openjdk.org/jmh/pull/85/files
 Webrev: https://webrevs.openjdk.org/?repo=jmh&pr=85&range=00
  Stats: 121 lines in 1 file changed: 121 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jmh/pull/85.diff
  Fetch: git fetch https://git.openjdk.org/jmh pull/85/head:pull/85

PR: https://git.openjdk.org/jmh/pull/85