[foreign] Poor performance?

[Brian Goetz]

> The bad news... since we (apparently) can't get a MethodHandle to the 
> constructor of our Struct impl class without triggering an access 
> violation (seemingly because it's a VMAC?), I had to disable the 
> access checking to get these numbers.

There's work underway to replace VMACs with something more predictable, 
which might well make this problem go away.