Sum over tuple slower than sum over array

[stevengj]

@miguelborrero

I see! I saw tuples as static-size arrays given that (aside from the type name) they have a type label and also a size label and therefore I thought that whenever possible making use of this static property by letting the compiler take it for granted would be weakly better. However, my intuition seems to naive! Thanks a lot for the reply.

StaticArrays.jl use tuples under the hood, and you should also use them only for small arrays. Static-size arrays don’t help the compiler when the length is large, and can easily hurt — it’s like you’re trying to compile code that has 10^7 local variables. See, for example:

• What's the deal with StaticArrays? - #2 by stevengj