hg: jdk/sandbox: 8193717: Import resolution performance regression in JDK 9

[chris.hegarty at oracle.com]

Changeset: 64c880300d9b
Author:    jlahoda
Date:      2018-05-29 13:17 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/64c880300d9b

8193717: Import resolution performance regression in JDK 9
Summary: Avoiding iteration through all sub-scopes of single import scope when looking up by name by only using those that may contain the given name.
Reviewed-by: mcimadamore

! src/jdk.compiler/share/classes/com/sun/tools/javac/api/JavacScope.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/api/JavacTrees.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Scope.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Enter.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Resolve.java
+ test/langtools/tools/javac/importscope/T8193717.java
! test/langtools/tools/javac/lib/DPrinter.java