clojure-internals.md

Clojure Internals

Which Clojure Expression

(defn m [v]
   {:foo "bar" :baz v})
;; <--   this one  -->

Disclaimer

The talk was a little too involved to take many notes. It will be useful to go through the Java code later to see what it's doing.

Tangents

• Consider:
  • clojure.tools.reader
  • clojure.tools.analyzer
• There's no supported API for creating small maps with compile-time constant keys as efficiently as the literal syntax.
• A PersistentArrayMap will upgrade itself to a PersistentHashMap as new keys are associated with it, but a PersistentHashMap will never downgrade itself.