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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. Jon Pretty‏ @propensive 5 Nov 2017

      After a day optimizing ASTs, Magnolia now gets approximately 12x better compile-time performance for typeclass derivation than Shapeless!

      6 replies 11 retweets 66 likes
      Show this thread
    2. Julien Tournay‏ @skaalf 6 Nov 2017
      Replying to @propensive

      Did you manage to deduplicate ?

      1 reply 0 retweets 0 likes
    3. Jon Pretty‏ @propensive 6 Nov 2017
      Replying to @skaalf

      Yes. For starters, I was generating the code for every typeclass twice. 🤦‍♂️But I also reduced my anonymous class count.

      1 reply 0 retweets 0 likes
    4. Jon Pretty‏ @propensive 6 Nov 2017
      Replying to @propensive @skaalf

      And managed to reuse typeclasses repeated in the same case class. Would be nice to deduplicate across case classes, but I'm not there yet.

      2 replies 0 retweets 0 likes
    5. mandubianhotep‏ @mandubian 6 Nov 2017
      Replying to @propensive @skaalf

      deduplicating might not be trivial & cost a lot... that will be some kind of compromise certainly...

      1 reply 0 retweets 0 likes
      Jon Pretty‏ @propensive 6 Nov 2017
      Replying to @mandubian @skaalf

      I don't think it would be a huge cost, compared to typechecking. My original code wasn't written with this optimization in mind, though...

      1:43 AM - 6 Nov 2017
      • 1 Like
      • mandubianhotep
      0 replies 0 retweets 1 like

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