Quoting Arnt Karlsen (arnt@???):

> ..yeah, and I really asked about RAID0, the top entry in both:
> https://www.prepressure.com/library/technology/raid#raid-0 or:
> https://www.stellarinfo.co.in/blog/advantages-and-disadvantages-popular-raid-systems/
>
> ..14 year old performance numbers:
> http://unthought.net/Software-RAID.HOWTO/Software-RAID.HOWTO-9.html#ss9.1

Apologies: I seem to have misparsed what you asked, twice. Sorry, I
really would have no data on the performance effects of combining RAID0
and swap, mostly because I've not yet been in a situation where I've
wanted to deploy volume spanning. (Yet, sure, it's great to use for
maximum mass storage performance, so of course there's a legitimate
use-case.)