Two more posts on ClojureCLR.Next. https://dmiller.github.io/clojure-clr-next/general/2023/02/12/PersistentVector-part-1.html https://dmiller.github.io/clojure-clr-next/general/2023/02/12/PersistentVector-part-2.html These were rough. The first one is not very interesting. The second one is a tough going. But PersistentVector is fully implemented with a good set of tests. I'll write one more post on it regarding transience in Clojure data structures. I plan to do some benchmarking to make to see if I'm doing anything in F# that leads to a decrease in performance compared to the C# version. I'll report on that when it's done.