time-action seems to assume that the elements of a vector literal are evaluated sequentially in order of index---is that guaranteed?
On Tue, Oct 2, 2012 at 6:35 PM, Karsten Schmidt <toxmeis...@gmail.com> wrote: > Hi Andy, the timings were collected with two litte macros I've written > and which are available here: > http://hg.postspectacular.com/macrochrono/src/tip/src/macrochrono.clj > > The actual project in question will be released in the next few > months, once things are more stable. > > I haven't run a profiler yet, but will try tomorrow... > > Thanks, K. > > On 3 October 2012 01:40, Andy Fingerhut <andy.finger...@gmail.com> wrote: >> I'm not aware of what changes made in 1.4 could cause this performance >> degradation. >> >> Out of curiosity, are you willing to share your code for performance >> profiling of future Clojure versions? i.e. is it open source already and so >> that wouldn't be a problem, or is it closed source? >> >> Have you run a profiler on your tests to see where the time is spent with >> Clojure 1.3 vs Clojure 1.4? >> >> Andy >> >> On Oct 2, 2012, at 4:24 PM, Karsten Schmidt wrote: >> >>> Today, I decided to finally switch one of my projects from Clojure >>> 1.3.0 to 1.4.0 (and test driving the 1.5.0 snapshot) but quickly found >>> some discouraging effects in terms of performance. The project >>> involves a lot of geometry and I'm using vanilla vectors for all >>> vector math. So far I've *not* been using any type hints or casting, >>> but was generally happy with the performance under 1.3.0... >>> >>> Under 1.3.0, e.g. a Delaunay triangulation of 5000 random 2D points >>> resulting in approx. 9450 triangles takes: >>> >>> average 422ms / minimum 393ms - version with transients: avg. 358ms / min. >>> 324ms >>> >>> The exact same code under 1.4.0: >>> >>> average 695ms / minimum 640ms - version with transients: avg. 672ms / min. >>> 616ms >>> >>> That's 1.65x slower and the only thing changed is the clojure version >>> number in project.clj. 1.5.0 snapshot is in the same league... :( Also >>> note that the impact of transients is much reduced compared to >>> 1.3.0... >>> (All stats collected over 60sec duration.) >>> >>> Has there been another overhaul or behavior change of numerics in >>> these recent versions? I'm really quite suprised/shocked by this find >>> and can't explain it to myself. I was hoping to use the library also >>> from CLJS in the future and hence have stayed away from adding type >>> hints and explicit casting... >>> >>> Thanks for any insights! >>> >>> Best, K. >> >> -- >> 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 > > -- > Karsten Schmidt > +44 7875 524 336 > > http://postspectacular.com | http://toxiclibs.org | http://toxi.co.uk > > -- > 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 -- Ben Wolfson "Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure." [Larousse, "Drink" entry] -- 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
