[8u] RFR (S) 8227018: CompletableFuture should not call Runtime.availableProcessors on fast path

[Aleksey Shipilev]

On 7/1/19 5:20 PM, Bob Vandette wrote:
> This quick patch reduces the performance difference to noise.
> This assumes that none of the cpu resource limits change.

This looks like a fix for JDK-8227006. We can backport that later too. CompletableFuture is changed
since 8u to drop this Runtime.availableProcessor call from the fast path anyway.

-- 
Thanks,
-Aleksey