RFR: 8339196: Optimize BufWriterImpl#writeU1/U2/Int/Long

[duke]

On Wed, 28 Aug 2024 13:16:03 GMT, Shaojin Wen <swen at openjdk.org> wrote:

> A small optimization makes BufWriterImpl's writeU1/U2/Int/Long methods more C2-friendly and improves performance.

@wenshao 
Your change (at version cd1140c1782255a5a1fcaaac89a37d21bf32582b) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk/pull/20748#issuecomment-2319021285