hg: jdk/sandbox: 8196334: Optimize UUID#fromString

[chris.hegarty at oracle.com]

Changeset: acc083236275
Author:    redestad
Date:      2020-03-02 08:22 +0100
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/acc083236275

8196334: Optimize UUID#fromString
Reviewed-by: igerasim, alanb
Contributed-by: plokhotnyuk at gmail.com, jon.chambers at gmail.com, claes.redestad at oracle.com

! src/java.base/share/classes/java/util/UUID.java
! test/jdk/java/util/UUID/UUIDTest.java
+ test/micro/org/openjdk/bench/java/util/UUIDBench.java