RFR: 8263677: Improve Character.isLowerCase/isUpperCase lookups

Tue Mar 16 20:02:14 UTC 2021

On Tue, 16 Mar 2021 12:51:02 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> This patch changes the otherLowercase / otherUppercase bits to be set if either the codepoint is of type LOWERCASE_LETTER and UPPERCASE_LETTER, or the Unicode Other_Lowercase / Other_Uppercase property is set. This simplifies the lookup in Character.isLowerCase/isUpperCase to a single table lookup, which appears to be healthy for performance.
> 
> I also took the opportunity to clean up the somewhat dated GenerateCharacter utility class.
> 
> Testing: tier1-3

Looks good from build point of view. I like the code cleanups.

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Marked as reviewed by erikj (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/3028