hg: jdk/sandbox: 8215017: Improve String::equals warmup characteristics

[chris.hegarty at oracle.com]

Changeset: ab57d6bebed8
Author:    redestad
Date:      2019-04-11 14:56 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/ab57d6bebed8

8215017: Improve String::equals warmup characteristics
Reviewed-by: jlaskey

! src/java.base/share/classes/java/lang/String.java
+ test/micro/org/openjdk/bench/java/lang/StringEquals.java