RFR (S) CR 7177472: JSR292: MethodType interning penalizes scalability

[Aleksey Shipilev]

On 06/09/2013 12:17 AM, Peter Levart wrote:
> In case the loop retries, there's no need to construct another WeakEntry...
> 
>             T interned;
>              WeakEntry<T> e = new WeakEntry<>(elem, stale);
>             do {
>                 expungeStaleElements();
>                 WeakEntry<T> exist = map.putIfAbsent(e, e);
>                 interned = (exist == null)? elem: exist.get();
>             } while (interned == null);
>             return interned;

That's right, thanks!

The update is here:
  http://cr.openjdk.java.net/~shade/7177472/webrev.02/

Testing:
  - Linux x86_64 builds OK
  - Linux x86_64 java/lang/invoke/ jtreg passes OK
  - The microbenchmark scores in the original note are still the same

-Aleksey.