I tested several times, but the latter is always slower. On Apr 25, 12:38 am, Jim <jimpil1...@gmail.com> wrote: > On 24/04/13 16:35, Alice wrote: > > > > > > > > > (defn foo [^long l cb] (cb l)) > > > (time > > (dotimes [n 1000000] > > (foo n (fn [l] nil)))) > > > (time > > (dotimes [n 1000000] > > (foo n (fn [^long l] nil)))) > > > "Elapsed time: 7.861 msecs" > > "Elapsed time: 11.770973 msecs" > > > Why is the latter slower? > > You should be getting very similar timings from these 2 versions as the > type-hinted arg 'l' is never used anywhere - you're just returning nil... > > Jim
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