On Mon, 1 Dec 2025 14:12:42 GMT, Roger Riggs <[email protected]> wrote:

> Spreading out and duplicating the state across multiple classes isn't very 
> satisfactory. Since non-ChronoField is very unlikely, I'd suggest a more 
> localized change confined to Parsed. Always create the initial EnumMap and 
> refactor the `fieldValues.put()` calls to a private utility method to catch 
> the ClassCatchException and upgrade the map to a HashMap. That should retain 
> the performance improvements without any extra overhead or non-local code 
> changes for all of the normal cases.

I also plan to upgrade EnumMap to a custom ChronoFieldMap, like this: 
https://github.com/wenshao/jdk/commit/b1cbc6295aa339a666996e910f46ab351e44726a 
Keeping the current implementation would be easier.

<img width="2666" height="548" alt="image" 
src="https://github.com/user-attachments/assets/30ede42c-1df7-4599-8541-5a1d3ce03f73";
 />

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PR Comment: https://git.openjdk.org/jdk/pull/28471#issuecomment-3599787338

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