RFR: 8302163: Speed up various String comparison methods with ArraysSupport.mismatch

[Sergey Tsypanov]

On Mon, 13 Feb 2023 09:59:24 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> We can improve various String methods such as `startsWith`, `endsWith` and `regionMatches` by leveraging the intrinsified mismatch methods in `ArraysSupport`.

Looks simple and harmless.

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Marked as reviewed by stsypanov (Author).

PR: https://git.openjdk.org/jdk/pull/12528