RFR: 8315999: Improve Date toString performance [v13]

Wed Sep 13 21:25:48 UTC 2023

On Wed, 13 Sep 2023 19:21:34 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> Based on the use cases cited, if your library needs specific performance improvements for specific formats, they should be done in that library.

I already do this in [fastjson2](https://github.com/alibaba/fastjson2) for now, but more libraries would benefit if improved in jdk.

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PR Comment: https://git.openjdk.org/jdk/pull/15658#issuecomment-1718334638