Hi all,

I did a trivial test, in case anybody's interested, in the unboxed sum idea approach, only considering the Int# branch.

https://gist.github.com/chrisdone/6aef640a49fc30b45ad210eac287dce9

It seems to be on par with Int, which is pretty cool because I wasn't sure what to expect. Assuming I didn't make a horrible mistake.

B = 272.2 μs
Int = 270.9 μs 
Integer = 7.860 ms 

Cheers,

Chris