<i18n dev> RFR: 8263090: Avoid reading volatile fields twice in Locale.getDefault(Category)

[Naoto Sato]

On Fri, 5 Mar 2021 14:14:14 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> This patch refactors Locale.getDefault(Category) so that the volatile field holding the Locale is typically only read once. This has a small performance advantage, and might be more robust if initialization is racy.

src/java.base/share/classes/java/util/Locale.java line 959:

> 957:     }
> 958: 
> 959:     private static Locale getDisplayLocale() {

Should this be `synchronized`?

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PR: https://git.openjdk.java.net/jdk/pull/2845