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add link to SI-4442

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1 parent 3fb551e commit af699454d11b11d00ca3c4062fd84420374ca12c @lihaoyi committed Sep 29, 2016
Showing with 2 additions and 1 deletion.
  1. +2 −1 post/15 - Benchmarking Scala Collections.md
@@ -874,7 +874,8 @@ surprisingly nice performance characteristics. Concatenating two `Array`s is
faster than concatenating any other data-structure, even immutable `List`s and
`Vector`s which are supposed to have clever structural sharing to reduce the
need to copy-everything. This holds even for with a million elements, and is
-a 10x improvement that's definitely non-trivial.
+a 10x improvement that's definitely non-trivial. There's an open issue
+[SI-4442](https://issues.scala-lang.org/browse/SI-4442) for someone to fix this.
Indexing into the `Array`, and iterating over it with a `while`-loop, are also
so fast that the time taken is not measurable given these benchmarks. Even

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