Use efficient types e.g. from `StaticArrays.jl`

[THinnerichs]

• E.g. StaticArrays (i.e. statically sized vectors) exist and are super efficient. Note that here "statically sized" means that the size can be determined from the type, and "static" does not necessarily imply
• This also relates to BitVector((1,0,1,0)) (which we use quite often). Using MVector (eltype must be isbitstype) or SizedVector instead is orders of magnitude faster.