RFR: 8321283: Reuse StringLatin1::equals in regionMatches

[Roger Riggs]

On Sat, 2 Dec 2023 16:56:22 GMT, Francesco Nigro <duke at openjdk.org> wrote:

> This improvement has been found on https://github.com/vert-x3/vertx-web/pull/2526.
> 
> It can potentially affect the existing ArraysSupport.mismatch caller code-path performance ie requires investigation.

This PR has aged quite a bit. Please merge with master to get an up-to-date PR.
It might be cleaner to close this PR and start fresh.
Also, please reconfirm the performance numbers.
Thanks

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PR Comment: https://git.openjdk.org/jdk/pull/16933#issuecomment-3583290268