Integrated: 8353741: Eliminate table lookup in UUID.toString

[Shaojin Wen]

On Mon, 6 Jan 2025 13:18:50 GMT, Shaojin Wen <swen at openjdk.org> wrote:

> Improve the performance of UUID::toString by using Long.expand and SWAR (SIMD within a register) instead of table lookup. Eliminating the table lookup can also avoid the performance degradation problem when the cache misses.

This pull request has now been integrated.

Changeset: 796ec5e7
Author:    Shaojin Wen <swen at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/796ec5e7cfcfb20d76a3b48c0b369dc73250f7e4
Stats:     118 lines in 2 files changed: 87 ins; 27 del; 4 mod

8353741: Eliminate table lookup in UUID.toString

Reviewed-by: rriggs

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PR: https://git.openjdk.org/jdk/pull/22928