Don't wrap an array just to get its length.

Use .length directly, avoiding the allocation of the WrappedArray.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/library/scala/Array.scala b/src/library/scala/Array.scala
index aede6a5d37..1848127395 100644
--- a/src/library/scala/Array.scala
+++ b/src/library/scala/Array.scala
@@ -240,7 +240,7 @@ object Array extends FallbackArrayBuilding {
    */
   def concat[T: ClassTag](xss: Array[T]*): Array[T] = {
     val b = newBuilder[T]
-    b.sizeHint(xss.map(_.size).sum)
+    b.sizeHint(xss.map(_.length).sum)
     for (xs <- xss) b ++= xs
     b.result()
   }