Foreign memory access hot loop benchmark

[Maurizio Cimadamore]

On 24/11/2020 11:19, Antoine Chambille wrote:
> If I look at the slow benchmark in detail, I observe that the first 
> two warmups run at the expected speed, but then it slows down 20x. 
> Very strange, it's almost as if some JIT optimization is suddenly 
> turned off:

This is something I've observed in the past as well, in some cases, when 
playing with VH.

We'll take a look.

Thanks
Maurizio