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

[Chen Liang]

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

test/jdk/java/lang/String/CountNonZeroAscii.java line 35:

> 33:  * @modules java.base/jdk.internal.access
> 34:  * @summary test latin1 String countNonZeroAscii
> 35:  * @run testng/othervm -XX:+CompactStrings CountNonZeroAscii

You are using the `testng` driver for a `main` test. I can probably fix it quickly.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20772#discussion_r1744224282