I guess my real question is: should I rely on this or is it a coincidence? Jay
On Mon, Feb 22, 2010 at 8:40 AM, Sam Tobin-Hochstadt <sa...@ccs.neu.edu> wrote: > On Mon, Feb 22, 2010 at 10:37 AM, Jay McCarthy <jay.mccar...@gmail.com> wrote: >> How should I expect these two lines to compare performance-wise: >> >> (apply make-prefab-struct >> (vector->list v)) >> >> vs >> >> (call-with-values (lambda () (vector->values v)) >> make-prefab-struct) > > #lang scheme > > (define v '#(foo 1 2 3)) > > (define k 1000000) > > (define (run1) > (for ((i (in-range k))) > (apply make-prefab-struct > (vector->list v)))) > > > (define (run2) > (for ((i (in-range k))) > (call-with-values (lambda () (vector->values v)) > make-prefab-struct))) > > (time (run1)) > (time (run2)) > > cpu time: 1068 real time: 1075 gc time: 60 > cpu time: 864 real time: 866 gc time: 44 > > > > > -- > sam th > sa...@ccs.neu.edu > -- Jay McCarthy <j...@cs.byu.edu> Assistant Professor / Brigham Young University http://teammccarthy.org/jay "The glory of God is Intelligence" - D&C 93 _________________________________________________ For list-related administrative tasks: http://list.cs.brown.edu/mailman/listinfo/plt-dev