Those numbers a re bit small to get a full view of the way the pypy jit works:

  user=> (time (reduce1 + (range 100000)))
  Elapsed time: 903.011083603 msecs
  4999950000
  user=> (time (reduce1 + (range 1000000)))
  Elapsed time: 777.748823166 msecs
  499999500000
  user=> (time (reduce1 + (range 10000000)))
  Elapsed time: 8764.57095146 msecs
  49999995000000
  user=>

  Clojure via hotspot:
  user=> (time (reduce + (range 100000)))
  "Elapsed time: 174.768593 msecs"
  4999950000
  user=> (time (reduce + (range 1000000)))
  "Elapsed time: 267.60421 msecs"
  499999500000
  user=> (time (reduce + (range 10000000)))
  "Elapsed time: 1131.77367 msecs"
  49999995000000
  user=>

But yes, we still have some room for improvement.