hey all, I'm trying to create a macro to use in the Clojurescript side of my cljc library. Basically, it's a complete rip-off of cljs.core/simple-benchmark but uses (js/performance.now) instead of (.getTime (js/Date.)). For some reason I can't get it to compile though. if I have the :cljs reader conditional, I get "benchmark does not exist" if I ditch the conditional I get things like "var bindings does not exist". And that does mean it exists in a cljc file of it's own.

#?(:cljs
   (cljs.core/defmacro benchmark
     [bindings expr iterations & {:keys [print-fn] :or {print-fn 'println}}]
     (cljs.core/let [bs-str   (pr-str bindings)
                     expr-str (pr-str expr)]
       `(let ~bindings
          (let [start#   (js/performance.now)
                ret#     (dotimes [_# ~iterations] ~expr)
                end#     (js/performance.now)
                elapsed# (- end# start#)]
            (~print-fn (cljs.core/str ~bs-str ", " ~expr-str ", "
                                      ~iterations " runs, " elapsed# " msecs")))))))