Very cool! I'm seeing a size reduction in some code of mine that made extensive use of core.match. Maybe from the removal of a lot of CLJS truth tests?
Do you have the source available to your CLJS spectral norm code? I'd like to see what special techniques (if any) are needed to get hand-coded js speeds. - Jason http://www.varywell.com/ On Tuesday, April 10, 2012 10:21:33 AM UTC-7, David Nolen wrote: > > I've merged these changes in master. I've also added another change that > results in yet another large perf boost: > > - direct invocation of known fns instead of going through .call > > It's now possible to write CLJS that has the exact same performance as > handwritten JS - I compared the handwritten JS spectral norm from Alioth to > one written in CLJS running under Node.js - the CLJS is actually a tad > faster on my machine. This probably due to GClosure. > > I also tried zebrao from core.logic. On my machine I consistently see > times just under 30ms in Google Chrome. > > David > > On Sun, Apr 8, 2012 at 8:59 PM, David Nolen <dnolen.li...@gmail.com>wrote: > >> The multi-arity fn optimization was causing some code size explosion. >> I've committed a refactor that eliminates the issue. Please try! >> >> On Sun, Apr 8, 2012 at 6:26 PM, David Nolen <dnolen.li...@gmail.com>wrote: >> >>> I've spend the past weekend doing some comprehensive optimizations to >>> ClojureScript, these can be seen here: >>> https://github.com/clojure/clojurescript/compare/all-optimizations >>> >>> With these optimizations operations are anywhere from 1.5X-5X faster >>> depending on the operation and the JavaScript environment. >>> >>> These optimizations include: >>> >>> * respect boolean type hints on fns >>> * remove CLJS truth tests if we can infer that an if's test expression >>> is boolean - this works for common combinations of and/or >>> - this removes nearly all truth tests from PersistentVector, big wins >>> here and for other persistent data structures to come >>> * multi-arity fns that are not used higher-order are now dispatched >>> directly to the correct arity instead of using JS arguments >>> - multi-arity protocol fns also benefit from this optimization >>> * remove all truth tests from protocol dispatch fns >>> >>> Feedback & improvements appreciated. Please try this branch out and let >>> us know if it works for you - especially interested if things are faster, >>> slower or if the changes adversely affect your file sizes under advanced >>> optimization. >>> >>> 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
