hg: jdk/sandbox: 8205194: Improve the Array Comparison when there is mismatch at first element.

[chris.hegarty at oracle.com]

Changeset: d7cf64ce3950
Author:    vdeshpande
Date:      2018-06-22 12:51 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/d7cf64ce3950

8205194: Improve the Array Comparison when there is mismatch at first element.
Summary: perform the first element comparison before the call to vectorizedMismatch method
Reviewed-by: psandoz, rriggs, igerasim

! src/java.base/share/classes/java/nio/BufferMismatch.java
! src/java.base/share/classes/jdk/internal/util/ArraysSupport.java