hg: jdk/sandbox: 8215995: Add specialized toArray methods to immutable collections

[chris.hegarty at oracle.com]

Changeset: 02e648ae46c3
Author:    redestad
Date:      2019-01-09 01:06 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/02e648ae46c3

8215995: Add specialized toArray methods to immutable collections
Reviewed-by: martin, smarks

! src/java.base/share/classes/java/util/ImmutableCollections.java
+ test/micro/org/openjdk/bench/java/util/ImmutableColls.java