> Thanks. But I don't do any number crunching here - just a huge structure > creation in memory. I can't get why removing the 'lazy-seq' wrapper from the > second 'concat' argument make things 10x times slower.
Lazy-seqs require the allocation of a LazySeq object. Due to the lazy nature of this structure, we have to protect against multiple evaluation. This means that certain methods have to be synchronized: (https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/LazySeq.java). All that makes it quite a bit slower than a simple Iterator. Timothy -- 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
