RFR: 8204194: Lazily create MethodHandleImpl$AsVarargsCollector.asCollectorCache

[Paul Sandoz]

+1

Paul.

> On May 31, 2018, at 2:24 PM, Claes Redestad <claes.redestad at oracle.com> wrote:
> 
> 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