(require '[clojure.java.io :refer [reader]])

  < 1 >
  (with-open [r (reader url)]
    (count (line-seq r))))

(count-lines "-digits")
  29301
(require '[clojure.java.io :refer [reader]])

  < 1 >
  (with-open [r (reader url)]
    (count (line-seq r))))

(count-lines "-digits")
  29301