One of the blips in the performance charts seem...

One of the blips in the performance charts seems to implicate some
changes I made with slice to reduce the number of implementations and
surface area for inconsistencies and bugs. Altering those changes in a
more performance-mindful way, although I don't see anything here which
is likely to help much. Also fixing some wrong documentation about
copyToArray. No review.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/library/scala/collection/LinearSeqOptimized.scala b/src/library/scala/collection/LinearSeqOptimized.scala
index 7c5cba0665..236a5bdaa3 100755
--- a/src/library/scala/collection/LinearSeqOptimized.scala
+++ b/src/library/scala/collection/LinearSeqOptimized.scala
@@ -168,7 +168,9 @@ trait LinearSeqOptimized[+A, +Repr <: LinearSeqOptimized[A, Repr]] extends Linea
     // since we are in collection.*, not immutable.*.
     // However making that change will pessimize all the
     // immutable linear seqs (like list) which surely expect
-    // drop to share.
+    // drop to share.  (Or at least it would penalize List if
+    // it didn't override drop.  It would be a lot better if
+    // the leaf collections didn't override so many methods.)
     //
     // Upshot: MutableList is broken and passes part of the
     // original list as the result of drop.