Clojure Implemented in Pure Python

Re:Clojure Implemented in Pure Python by ericmoritz on Wednesday February 29, 2012 @08:40PM (#3650586)

Here's a quick benchmark on my machine (a EeePC 1001HE). I used reduce1 with clojure-py because there doesn't seem to be a reduce BIF. I don't know if that effected this benchmark any:

Python:

    (time (reduce1 + (range 100000)))
    Elapsed time: 3882.57193565 msecs
    4999950000

PyPy:

    user=> (time (reduce1 + (range 100000)))
    Elapsed time: 259.984970093 msecs
    4999950000

Clojure via Java Hotspot:

    user=> (time (reduce + (range 100000)))
    "Elapsed time: 75.35225 msecs"
    4999950000

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Re:Clojure Implemented in Pure Python by halgari on Wednesday February 29, 2012 @09:01PM (#3650634)

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.

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Re:Clojure Implemented in Pure Python by halgari on Wednesday February 29, 2012 @10:37PM (#3650807)

Here's a blog post explaining the issues involved in a bit more detail: http://clojure-py.blogspot.com/

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