RFR: 8299193: Micro-optimization in Buffer

[Roger Riggs]

On Wed, 21 Dec 2022 12:22:33 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposed a micro-optimization in Buffer. This change will benefit several subclasses as well.

LGTM; it would be enough to say it should be final.
Posing this as an optimization leads one to wonder how much?

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Marked as reviewed by rriggs (Reviewer).

PR: https://git.openjdk.org/jdk/pull/11755