On Tuesday, June 3, 2014 12:46:55 PM UTC-5, Mars0i wrote: > > (def ones (doall (repeat 1000 1))) > (bench (def _ (doall (map rand ones)))) ; 189 microseconds average time > (bench (def _ (doall (pmap rand ones)))) ; 948 microseconds average time >
For the record, I worried later that rand was too inexpensive, and that those results were being driven only by the cost of setting up threads in pmap. This seems like a better test: (bench (def _ (doall (map #(nth (iterate rand %) 10000) (repeat 256 1))))) ; 185 milliseconds average time (bench (def _ (doall (pmap #(nth (iterate rand %) 10000) (repeat 256 1))))) ; 793 milliseconds average time I have been having success getting a speedup simply by changing certain map calls to pmap in my main project. I'm sure that many of us will be interested in a report whenever you get to it, but I can easily imagine that finding the time to summarize what you've learned is difficult. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
