Want Speed? Pass by Value.

https://web.archive.org/web/20130930101140/http://cpp-next.com/archive/2009/08/want-speed-pass-by-value

FP using JS

https://blog.scalac.io/2015/04/02/clojurescript-reactjs-reagent.html

111

https://www.infoq.com/presentations/Taming-Effect-Simon-Peyton-Jones