Could someone else also try the sample code I included to see if they
also experience the same ~10x slowdown for (count (filter ...)) in 1.3
Alpha 2?
On Oct 28, 12:34 pm, Btsai <benny.t...@gmail.com> wrote:
> I have some code that counts the elements in a list that map to true
> in a lookup table, looking something like this:
>
> (def lookup-table {1 true, 2 false})
> (def elements (range 1000000))
> (count (filter lookup-table elements))
>
> On my machine, with server mode enabled, the count + filter got ~10
> times slower when I updated from 1.3 Alpha 1 to 1.3 Alpha 2:
>
> (Alpha 1)
> user=> (time (count (filter lookup-table elements)))
> "Elapsed time: 181.262702 msecs"
> 1
>
> (Alpha 2)
> user=> (time (count (filter lookup-table elements)))
> "Elapsed time: 2017.744155 msecs"
> 1
>
> Which is weird because looking up elements in the table did not become
> any slower:
>
> (Alpha 1)
> user=> (time (doseq [x elements] (lookup-table x)))
> "Elapsed time: 159.033341 msecs"
> nil
>
> (Alpha 2)
> user=> (time (doseq [x elements] (lookup-table x)))
> "Elapsed time: 159.965861 msecs"
> nil
--
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
