RFR(s): JDK-8214687 Optimize Collections.nCopies().hashCode()

[Martin Buchholz]

>
> In performance critical code, we don't trust hotspot to not reload final
> fields.  Other forEach methods do this, e.g.


        final Object[] es = queue;
        for (int i = 0, n = size; i < n; i++)
            action.accept((E) es[i]);