added a timeout of 500 milliseconds.

client/web/search.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 import 'dart:html' hide Element;
 import 'dart:html' as html show Element;
 import 'app.dart';
 import 'package:dartdoc_viewer/item.dart';
 import 'package:dartdoc_viewer/search.dart';
 import 'package:web_ui/web_ui.dart';
 import 'package:web_ui/watcher.dart' as watchers;
 
 /**
  * Component implementing the Dartdoc_viewer search.
  */
 class Search extends WebComponent {
-  /** Search query. */
-  @observable String searchQuery = "";
+
   List<SearchResult> results = toObservable(<SearchResult>[]);
   String _lastQuery;
   @observable bool isFocused = false;
   
   int currentIndex = -1;
 
   void updateResults() {
     currentIndex = -1;
     results.clear();
     results.addAll(lookupSearchResults(searchQuery, viewer.isDesktop ? 10 : 5));
@@ skipping 79 matching lines @@
       // Allow writing 's' in the search input.
       document.query('#q').focus();
       event.preventDefault();
     } else if (event.keyCode == KeyCode.ESC) {
       document.body.focus();
       isFocused = false;
       event.preventDefault();
     }
   }
 }