RFC: Sending pre-encoded text over a web socket.

runtime/bin/vmservice/server.dart

Index: runtime/bin/vmservice/server.dart
diff --git a/runtime/bin/vmservice/server.dart b/runtime/bin/vmservice/server.dart
index c032c2613f95e15bae71b5f625a29c0281e0f530..43186d13e181c74e57f13b941af17e88c53393e1 100644
--- a/runtime/bin/vmservice/server.dart
+++ b/runtime/bin/vmservice/server.dart
@@ -57,10 +57,7 @@ class WebSocketClient extends Client {
         // String message as external Uint8List.
         assert(result is List);
         Uint8List cstring = result[0];
-        // TODO(rmacnak): cstring may be large. Add a way to pass an encoded
-        // string to a web socket that will be sent as a text message to avoid
-        // the space overhead of converting cstring to a Dart string.
-        socket.add(UTF8.decode(cstring));
+        socket.addUtf8Text(cstring);
       }
     } catch (_) {
       print("Ignoring error posting over WebSocket.");