On Sun, Oct 27, 2019 at 01:16:10PM +0100, Peter Bex wrote: > This super simple benchmark runs 25% faster with -O3: > > (define (foo #!optional (a 1) (b 2)) > (+ a b)) > > (time > (let lp ((i 0)) > (unless (= i 100000000) > (foo 1 3) > (lp (add1 i)))))
I've tested some more, and the more rest arguments you add, the bigger the difference is (because more needs to be consed onto the stack). With 4 arguments (which are all supplied in the call), it is 40% faster. With 8 arguments it is 60% faster etc. Of course most procedures will only have a handful of rest arguments. Cheers, Peter
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