After a day optimizing ASTs, Magnolia now gets approximately 12x better compile-time performance for typeclass derivation than Shapeless!
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Magnolia has a significant advantage over Shapeless in that it knows a lot more at the same time, so it's able to do more optimizations.
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I've been saying "Shapeless/Kittens" a lot, but that's really just the clever magic which works on top of Scala's implicit search.
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And unfortunately, there's not a lot Shapeless can do to improve the performance of implicit search.
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