RFR: 8339290: Optimize ClassFile Utf8EntryImpl#writeTo [v20]

[Claes Redestad]

On Wed, 4 Sep 2024 12:01:37 GMT, Shaojin Wen <swen at openjdk.org> wrote:

>> Use fast path for ascii characters 1 to 127 to improve the performance of writing Utf8Entry to BufferWriter.
>
> Shaojin Wen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   from @cl4es 's suggestion

Marked as reviewed by redestad (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/20772#pullrequestreview-2280857373