Execute the same function multiple times in parallel in Clojure?

Question

I have a function that I'd like to run multiple times, generating a list of the results:

(take 10 (repeatedly #(myfunc)))

I realized I could run them in parallel with pmap:

(pmap (fn [_] (myfunc)) (range 10))

But it is a bit untidy. Is there a standard function that lets me do this Something like:

(prun 10 #(myfunc))

?

Alan Thompson · Accepted Answer · 2015-10-09 22:03:58Z

You may also be interested in The Claypoole library for managing threadpools and parallel processing. Look at their version of pmap and pfor.

Mars · Accepted Answer · 2015-10-09 03:47:12Z

I don't think there's an existing function, but using pcalls rather than pmap seems a little closer to what you want:

(defn prun [n f] (apply pcalls (repeat n f)))

You don't need to wrap myfunc with #() in the call torepeatedly, btw, nor calling prun as defined above:

(prun 10 myfunc)

You may find pvalues useful as well.

Wow, that is precise what I was looking for. Thanks. Didn't come across those calls while looking at the documentation myself.
Glad it was helpful, Ana. You may want to upvote and possibly accept. Up to you.

CIRCLE · Accepted Answer · 2021-04-16 10:29:37Z

You can use dotimes

(dotimes [_ 10] (myfunc))

This will run your function 10 times. Be sure to run this in the same namespace as your function

3 Answers 3