It wouldn't change the performance profile of existing programs because currently there isn't a way to concat two vectors and get a new vector. I don't envision changing the behavior of clojure.core/concat, that should still return a seq. It seems better to create a new function like 'joinvec' that is a more performant alternative to concat. This is similar to subvec, which is a more performant alternative to take and drop.
Another question is whether to change the behavior of subvec, which currently holds onto the entire vector, or create a new method like 'splitvec' to provide the new RRB-based splitting. On Nov 15, 2011, at 8:59 AM, Karl Krukow <karl.kru...@gmail.com> wrote: > > > On Tuesday, November 15, 2011, Justin Balthrop <jus...@justinbalthrop.com> > wrote: > > > My understanding from the talk was that RRB-Trees have performance > > identical to PersistentVector as long as you don't concat or split > > them. So why not just replace the PersistentVector implementation with > > an RRB-Tree? > > I guess that could be a possibility but that would change the performance > profile of some programs that actually use concat, ie concat would speed up > and the other operations would slow (was it about 60%? can't remember the > numbers here). So I think it should be opt in. > > Karl > -- > 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 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
