RFR: 8311207: Cleanup for Optimization for UUID.toString [v6]

[Chen Liang]

On Fri, 7 Jul 2023 15:02:54 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> Is there a significant performance difference?

Yes, see https://github.com/openjdk/jdk/pull/14745#issuecomment-1615435719 for the revision at https://github.com/openjdk/jdk/pull/14745/commits/425559f65a3e5f72323abdadbbf9df426e196d9b
On my device, the UUIDBench.toString has a smaller difference of about 8%, but it is still noticeable.

Unfortunately, I don't know architecture well enough to explain this difference.

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PR Review Comment: https://git.openjdk.org/jdk/pull/14745#discussion_r1256560149