[_a_a_a_]

I must admit to disliking C#'s functional libraries. I have wasted so much time trying to get the buggers into a pipeline. It becomes agonising in a way that doing the same thing in Scala was so very much a dream. I keep discovering the hard way, just don't do it (or just get a whole lot more experienced at it, although I don't know how without going through the pain barrier, and deeper each time, like Inception).

Could you give me a hint about these 'performance oriented primitives' please? (The only ones I can think of are structs versus classes) Edit: but isn't there a new thing where you can subtype a class without allocations, like Scala's record classes, or is that new in Java, can't remember.