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propensive's profile
Jon Pretty
Jon Pretty
Jon Pretty
@propensive

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Jon Pretty

@propensive

Supporting Scala through professional training and open-source software. Responsible for Magnolia, Fury, Scala World and Functional Africa.

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propensive.com
Joined July 2010

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    1. Daniel Spiewak‏ @djspiewak 11 Feb 2017

      So for the record, java.util.HashMap is startlingly faster than Scala's mutable.Map. I'm not actually sure why one would use the latter.

      12 replies 22 retweets 68 likes
    2. Lgd. Viktor Klang‏ @viktorklang 12 Feb 2017
      Replying to @djspiewak

      @jboner IMO mutable collections == performance optimization. I'd rather have persistent collections + mutable builders only.

      5 replies 5 retweets 13 likes
    3. abhishek manocha‏ @koolak82 12 Feb 2017
      Replying to @viktorklang @djspiewak @jboner

      absolutr gem of conversation

      1 reply 0 retweets 0 likes
    4. Lgd. Viktor Klang‏ @viktorklang 12 Feb 2017
      Replying to @koolak82 @djspiewak @jboner

      Speaking of gems, anyone like the Clojure transient-persistent design?

      1 reply 0 retweets 0 likes
    5. Daniel Spiewak‏ @djspiewak 12 Feb 2017
      Replying to @viktorklang @koolak82 @jboner

      Transients are cool. Kinda similar in practice to how you use ListBuffer. But I haven’t needed them in Scala.

      1 reply 0 retweets 0 likes
    6. Lgd. Viktor Klang‏ @viktorklang 12 Feb 2017
      Replying to @djspiewak @koolak82 @jboner

      I am sort of a s.c.i.List-hater. :-)

      1 reply 0 retweets 1 like
    7. Daniel Spiewak‏ @djspiewak 12 Feb 2017
      Replying to @viktorklang @koolak82 @jboner

      For small collections, it’s a lot faster than Vector.

      1 reply 0 retweets 3 likes
    8. Lgd. Viktor Klang‏ @viktorklang 12 Feb 2017
      Replying to @djspiewak @koolak82 @jboner

      For small collections, a thin wrapper over Array is better ;-)

      1 reply 0 retweets 3 likes
    9. Daniel Spiewak‏ @djspiewak 12 Feb 2017
      Replying to @viktorklang @koolak82 @jboner

      Very true.

      1 reply 0 retweets 0 likes
      Jon Pretty‏ @propensive 12 Feb 2017
      Replying to @djspiewak

      I still have memories of you at @nescalas 2011 telling us that vectors are really really really really really really really fast!

      8:18 AM - 12 Feb 2017
      • 4 Likes
      • Northeast Scala Symposium Ray Lőrinc Jens Grassel
      1 reply 0 retweets 4 likes
        1. New conversation
        1. Daniel Spiewak‏ @djspiewak 12 Feb 2017
          Replying to @propensive

          :-D They are. Just… not as fast as I need sometimes. Also Scala’s Vector has a massive amount of unnecessary overhead.

          1 reply 0 retweets 3 likes
        2. Jon Pretty‏ @propensive 12 Feb 2017
          Replying to @djspiewak

          Yep.

          0 replies 0 retweets 0 likes
          3. End of conversation

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