On Wed, 5 Aug 2020 08:21:07 -0700 (PDT), "[email protected]" <[email protected]> wrote:
>I was working on a exercism problem named Raindrops. > > : > >I thought version 1 would be faster, but it turned out to be wrong. Running >with raco test got following timing information. > >version 1 >cpu time: 9 real time: 9 gc time: 9 >version 2 >cpu time: 0 real time: 0 gc time: 0 > >Then I ran both version in DrRacket, both output following result. >cpu time: 0 real time: 0 gc time: 0 > >It's strange, isn't it? It looks like the time for the 1st version was skewed by a garbage collection during execution. Generally for a decent benchmark, you need to run the code many times and average the results. For Racket, additionally you need to *exclude* the time for the 1st run because that will include time for JIT compilation. George -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/csmnifpho2kgr9sme0psdd0729ui9isdhb%404ax.com.
