On Wed, Jun 13, 2012 at 5:27 PM, Warren Lynn <wrn.l...@gmail.com> wrote: > I cannot help notice that leinengen seems quite slow. Even "lein help" takes > 8 seconds to finish printing all the information. I am using version 2 on > Windows 7(that .bat file). Can anyone explain what is going on? Or is it > just me? Thank you.
You should consider `lein help` basically the worst-case scenario for benchmarking since it has to load absolutely everything. A better base case is `lein version` for just the overhead of Leiningen itself, which we try to get to complete in under a second on a fast machine with a warm cache. (There's currently a regression where this is ~1.4s, but this is being treated as a bug.) But tasks that involve running project code are necessarily slower since a second JVM is involved for purposes of isolation. A good benchmark here is `lein run -m clojure.main/main nil`, which takes about 3s on my machine. Most people have development styles that don't involve launching a new JVM very often though; generally you start your repl and leave it running for days. It does mean that Clojure is ill-suited for certain unixy tasks though. Most of this is simply the time it takes to load Clojure code. While the JVM has had a lot of investment in its performance, nearly all of it has been focused on long-running processes; they haven't seemed to be interested in improving boot time since it became clear that applets were on their way out. -Phil -- 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
