RFR: JDK-8032012, , String.toLowerCase/toUpperCase performance improvement

[Paul Sandoz]

On Feb 6, 2014, at 5:37 AM, Xueming Shen <xueming.shen at oracle.com> wrote:

> Fair enough. I don't think it's going to be a measurable difference. I have updated the webrev
> to use the Character.isSurrogate() for better readability.
> 
> http://cr.openjdk.java.net/~sherman/8032012/webrev
> 

One last point, sorry :-)

Can you use Character.toUpperCase rather than Character.toUpperCaseEx ? [*].

Paul.

[*] They both seem to point to the same code, so either Character.toUpperCase can incorrectly return Character.ERROR or Character.toUpperCaseEx never returns ERROR:

    public static int toUpperCase(int codePoint) {
        return CharacterData.of(codePoint).toUpperCase(codePoint);
    }

    static int toUpperCaseEx(int codePoint) {
        assert isValidCodePoint(codePoint);
        return CharacterData.of(codePoint).toUpperCaseEx(codePoint);
    }



abstract class CharacterData {
    ...
    abstract int toUpperCase(int ch);
    ...

    //need to implement for JSR204
    int toUpperCaseEx(int ch) {
        return toUpperCase(ch);
    }