hg: jdk9/sandbox/langtools: 8072114: javac performance should be improved

[chris.hegarty at oracle.com]

Changeset: 1d3c7096b3b6
Author:    jlahoda
Date:      2017-03-08 20:42 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/langtools/rev/1d3c7096b3b6

8072114: javac performance should be improved
Summary: Avoiding unnecessary use of Stream.empty().
Reviewed-by: mcimadamore

! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Scope.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/util/Iterators.java