My 2 cents, I read about transients for the first time (why is the page not linked from clojure.org?) and they seem very promising at a first glance.
I'm not sure if I agree with Michael's idea of having the same functions for transients and persistents both. Functions should have easy, reproducible semantics imo. If I take a look at a function call in isolation of its environment, I should be able to predict its semantics exactly, not in 90% cases, but 100% (maybe ideal, given my inexperience). But I do agree with his concern about the multitude of functions for persistents and very few for transients. If I want my bottleneck function to use transients, it should be straightforward. Else most of the energy would be spent to re write things like foo-in etc. But maybe that's a deliberate design decision take by Rich not to make transients popular? On the transients page Rich has given a very simple benchmark - (time (def v (vrange 1000000))) "Elapsed time: 297.444 msecs" (time (def v2 (vrange2 1000000))) "Elapsed time: 34.428 msecs" But on my system I don't get a ~9x performance boost, it mostly get a ~3x performance boost (1.2). Have there been some changes? What do other people get? (time (def v (vrange 1000000))) "Elapsed time: 261.82 msecs" (time (def v2 (vrange2 1000000))) "Elapsed time: 87.3 msecs" Michael: "bash in place" means in-place memory writing, for example in Java we have a Collections.sort(list) method which uses in-place merge sort. That method doesn't return a sorted list, it just changes the original list in place (which is more memory efficient). Hope I've been successful in conveying to you. - Thanks -- 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
