hg: jdk/jdk: 8224986: (str) optimize StringBuilder.append(CharSequence, int, int) for String arguments

[claes.redestad at oracle.com]

Changeset: f91999057a5a
Author:    redestad
Date:      2019-05-31 12:20 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/f91999057a5a

8224986: (str) optimize StringBuilder.append(CharSequence, int, int) for String arguments
Reviewed-by: jlaskey, rriggs

! src/java.base/share/classes/java/lang/AbstractStringBuilder.java
! src/java.base/share/classes/java/lang/String.java
! test/micro/org/openjdk/bench/java/lang/StringBuilders.java