hg: jdk/sandbox: 8189747: JDK9 javax.lang.model.util.Elements#getTypeElement regressed 1000x in performance.

[chris.hegarty at oracle.com]

Changeset: a49d106e9b7c
Author:    jlahoda
Date:      2018-07-16 12:35 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/a49d106e9b7c

8189747: JDK9 javax.lang.model.util.Elements#getTypeElement regressed 1000x in performance.
Summary: Caching the results of Elements.getTypeElement/getPackageElement
Reviewed-by: darcy

! src/jdk.compiler/share/classes/com/sun/tools/javac/model/JavacElements.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java
! test/langtools/tools/javac/modules/AnnotationProcessing.java