bit sets in IntSet vs. Integer

[Henning Thielemann]

On Sun, 19 Jun 2016, David Feuer wrote:

> Your quick look is insufficient. There are custom implementations of bit 
> setting and clearing operations that use GMP primitives instead of the 
> Data.Bits defaults.

I have seen them, but the expensive operations like 'union' and 
'difference' are not optimized, right? They would benefit from CPU vector 
instructions.