RFR: 8237878: Improve ModuleLoaderMap datastructures

[Claes Redestad]

Hi,

On 2020-02-13 09:12, Peter Levart wrote:
> This change is ok as it stands, but I'm afraid it is not in the spirit 
> of Valhalla.

I wouldn't really know what the spirit of Valhalla will end up being,
yet. :-)

Unboxing the values have a measurable cost in the interpreter, and
can trigger some very early JIT compilations I'd like to avoid.

/Claes