RFR: 6714245: [Col] Collator - Faster Comparison for identical strings.

[Naoto Sato]

On Thu, 11 May 2023 18:27:28 GMT, Justin Lu <jlu at openjdk.org> wrote:

> Please review this PR which adds an initial equality check to `RuleBasedCollator.compare(String source, String target)`.
> 
> This speeds up the operation for equal input Strings, as it bypasses Collator rule comparisons of each element for both of the input Strings.

LGTM. `noreg-perf` issue label might fit better for this

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Marked as reviewed by naoto (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13938#pullrequestreview-1423398642