RFR: 8204194: Lazily create MethodHandleImpl$AsVarargsCollector.asCollectorCache

[Claes Redestad]

Hi,

please review this tiny fix that removes the eager creation of 
asCollectorCache, which saves us a few milliseconds on certain startup 
tests with no observed peak performance penalties.

Bug: https://bugs.openjdk.java.net/browse/JDK-8204194
Patch: [1]

Thanks!

/Claes

[1]

diff -r 80c69f5cd21a 
src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java
--- a/src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java 
  Thu May 31 06:15:17 2018 -0700
+++ b/src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java 
  Thu May 31 23:23:03 2018 +0200
@@ -499,7 +499,6 @@
              super(type, target);
              this.target = target;
              this.arrayType = arrayType;
-            this.asCollectorCache = target.asCollector(arrayType, 0);
          }

          @Override