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Chain optimize map method #2995

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Aug 20, 2019
Merged

Chain optimize map method #2995

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6 changes: 4 additions & 2 deletions core/src/main/scala/cats/data/Chain.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -137,8 +137,10 @@ sealed abstract class Chain[+A] {
/**
* Applies the supplied function to each element and returns a new Chain.
*/
final def map[B](f: A => B): Chain[B] =
fromSeq(iterator.map(f).toVector)
final def map[B](f: A => B): Chain[B] = this match {
case Wrap(seq) => Wrap(seq.map(f))
case _ => fromSeq(iterator.map(f).toVector)
}

/**
* Applies the supplied function to each element and returns a new Chain from the concatenated results
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