Improve performance for addAll with type check for Collection

2014-06-09 14:51:05 +04:00
parent 65da4cb2fb
commit 132f2a5fa8
1 changed files with 4 additions and 1 deletions
@@ -4,7 +4,10 @@ package kotlin
 * Adds all elements of the given *iterable* to this [[MutableCollection]]
 */
 public fun <T> MutableCollection<in T>.addAll(iterable: Iterable<T>): Unit {
-    for (e in iterable) add(e)
+    when (iterable) {
+        is Collection -> addAll(iterable)
+        else -> for (e in iterable) add(e)
+    }
 }

 public fun <T> MutableCollection<in T>.addAll(stream: Stream<T>): Unit {