RFR: 8285001: Simplify StringLatin1.regionMatches

Tue Apr 19 20:33:08 UTC 2022

On Tue, 19 Apr 2022 08:50:09 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> There is no pair of character values in the latin1 range (0-255) that will make the condition at line 401 in `StringLatin1.java` true, so this test can be removed.
> 
> Added a test and a microbenchmark (which as expected sees a few ns/op improvement from this change). Took the opportunity to tune the default settings for the micro to reduce runtime from 30+ minutes to 3 with no discernible degradation of quality.

Thanks for reviews!

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PR: https://git.openjdk.java.net/jdk/pull/8292