Chunked seqs are annoyingly fast. :) On Monday, November 27, 2017 at 3:07:10 PM UTC-6, tbc++ wrote: > > >> Also, I think the transducer version should always be faster, no matter > >> the > size of the source collection (no threshold). > > It's a bit more complicated than that, mostly because transducer pipelines > require about 2 allocations per step during creation. Also, most of the > performance boost from transducers is due to less garbage being created, > and some times the heap of the JVM is so large you'll never see much change > from switching to transducers. > > Don't get me wrong, transducers are great and I often default to them over > seqs, but in micro-benchmarks like this there's too much in play to always > see a 100% performance boost. > > On Mon, Nov 27, 2017 at 12:55 PM, David Bürgin <dbuer...@gluet.ch> wrote: > >> Jiacai – >> >> I saw you updated the gist. Just in case it passed you by: performance >> profits from the source collection being reducible. So pouring ‘dataset’ >> into a vector beforehand should speed up the processing quite a bit. >> >> Also, I think the transducer version should always be faster, no matter >> the size of the source collection (no threshold). >> >> >> -- >> David >> >> -- >> 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. >> > > > > -- > “One of the main causes of the fall of the Roman Empire was that–lacking > zero–they had no way to indicate successful termination of their C > programs.” > (Robert Firth) >
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