fat cond

_compile.sh

#!/usr/bin/env bash

clj -Srepro -m cljs.main -co @compiler-opts.edn -c repro

compiler-opts.edn

{:source-paths ["."]
 :warnings {:single-segment-namespace false}}

deps.edn

{:paths ["."]
 :deps {org.clojure/clojure {:mvn/version "1.10.0"}
        org.clojure/clojurescript {:mvn/version "1.10.439"}}}

repro.clj

(ns repro)

(defmacro fat-cond [n]
  (let [clauses (repeat n [`false `(cljs.core/do)])]
    `(cond
       ~@(flatten clauses))))

repro.cljs

(ns repro
  (:require-macros [repro :refer [fat-cond]]))

(fat-cond 10000)