hg: jdk9/sandbox/langtools: 8150641: Repeated compilation with a long classpath significantly slower on JDK 9

[chris.hegarty at oracle.com]

Changeset: 65837a9d9c4a
Author:    jlahoda
Date:      2016-04-13 09:50 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/langtools/rev/65837a9d9c4a

8150641: Repeated compilation with a long classpath significantly slower on JDK 9
Summary: Caching resolved zip paths, and their non-existence; introducing an abstraction over jrtfs, directory and zipfs.
Reviewed-by: jjg

! src/jdk.compiler/share/classes/com/sun/tools/javac/api/JavacTool.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/file/JavacFileManager.java