Inside Clojure's Collection Model (2016)

This reminded me of this article on hash array mapped trie performance in Haskell, Java and Clojure[0].

[0]: http://blog.ezyang.com/2010/03/the-case-of-the-hash-array-ma...

If you're interested into digging deeper, this just came out:

https://purelyfunctional.tv/guide/clojure-collections/