lunr.js delivers fast search results because the entire search process happens in the browser. There is no network delay because the network never gets touched during the search. If you run a Jekyll-based blog, this post will tell you how to make lunr.js work for you. Gotchas (and solutions) are shared within.
Parallella is an 18-core computer, about the size of a credit card. It runs Linux. In this 5-minute video, Parallella comes dangerously close to beating a $2k Mac at finding prime numbers.