sdk/lib/html/dart2js/html_dart2js.dart - Issue 12382022: Speeding up Node.nodes.addAll

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Unified Diff: sdk/lib/html/dart2js/html_dart2js.dart

Issue 12382022: Speeding up Node.nodes.addAll (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart

Patch Set: Created 7 years, 10 months ago

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Index: sdk/lib/html/dart2js/html_dart2js.dart

diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart

index 87ba3f1d5cf122a900adb8580cdcff1d7535d571..7b7ad1efecf54df81cccb89b54afff71572cfa34 100644

--- a/sdk/lib/html/dart2js/html_dart2js.dart

+++ b/sdk/lib/html/dart2js/html_dart2js.dart

@@ -17083,7 +17083,13 @@ class _ChildNodeListLazy implements List {

void addAll(Iterable<Node> iterable) {

if (iterable is _ChildNodeListLazy) {

- iterable = new List.from(iterable);

+ if (iterable._this != _this) {

+ // Optimized route for copying between nodes.

+ for (var i = 0, len = iterable.length; i < len; ++i) {

+ _this.$dom_appendChild(iterable[0]);

+ }

+ return;

}

for (Node node in iterable) {

_this.$dom_appendChild(node);