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clojure-dev 2026-01-13
Invoking an anonymous primitive function seems to not use the primitive interface.
(set! *unchecked-math* :warn-on-boxed)
(let [f (fn ^double [] 1.0)]
(+ 1.0 (f)))
;; Boxed math warning👀 1
bronsa 2026-01-13T14:24:11.199809Z
it's at least very intentional in the compiler, invokePrim optimisations are only emitted for var callsites
The limitation to 4 arguments on primitive functions means it’s not always possible to use a defn instead.