Change Maps to HashMaps to save in performance, index and generated directories not touched

pkg/analysis_server/lib/src/context_directory_manager.dart

 // Copyright (c) 2014, 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.
 
 library context.directory.manager;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analysis_server/src/package_map_provider.dart';
 import 'package:analysis_server/src/resource.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:watcher/watcher.dart';
 
 /**
  * Information tracked by the [ContextDirectoryManager] for each context.
  */
 class _ContextDirectoryInfo {
   /**
    * Stream subscription we are using to watch the context's directory for
    * changes.
    */
   StreamSubscription<WatchEvent> changeSubscription;
 
   /**
    * Map from full path to the [Source] object, for each source that has been
    * added to the context.
    */
-  Map<String, Source> sources = new HashMap<String, Source>();
+  HashMap<String, Source> sources = new HashMap<String, Source>();
 
   /**
    * Dependencies of the context's package map.  If any of these files changes,
    * the package map needs to be recomputed.
    */
   Set<String> packageMapDependencies;
 }
 
 /**
  * Class that maintains a mapping from included/excluded paths to a set of
  * folders that should correspond to analysis contexts.
  */
 abstract class ContextDirectoryManager {
   /**
    * File name of pubspec files.
    */
   static const String PUBSPEC_NAME = 'pubspec.yaml';
 
   /**
    * [_ContextDirectoryInfo] object for each included directory in the most
    * recent successful call to [setRoots].
    */
-  Map<Folder, _ContextDirectoryInfo> _currentDirectoryInfo =
+  HashMap<Folder, _ContextDirectoryInfo> _currentDirectoryInfo =
       new HashMap<Folder, _ContextDirectoryInfo>();
 
   /**
    * The [ResourceProvider] using which paths are converted into [Resource]s.
    */
   final ResourceProvider resourceProvider;
 
   /**
    * Provider which is used to determine the mapping from package name to
    * package folder.
@@ skipping 164 matching lines @@
   }
 
   static bool _shouldFileBeAnalyzed(String path) {
     return AnalysisEngine.isDartFileName(path)
             || AnalysisEngine.isHtmlFileName(path);
   }
 
   /**
    * Called when a new context needs to be created.
    */
-  void addContext(Folder folder, Map<String, List<Folder>> packageMap);
+  void addContext(Folder folder, HashMap<String, List<Folder>> packageMap);
 
   /**
    * Called when the set of files associated with a context have changed (or
    * some of those files have been modified).  [changeSet] is the set of
    * changes that need to be applied to the context.
    */
   void applyChangesToContext(Folder contextFolder, ChangeSet changeSet);
 
   /**
    * Remove the context associated with the given [folder].
    */
   void removeContext(Folder folder);
 
   /**
    * Called when the package map for a context has changed.
    */
   void updateContextPackageMap(Folder contextFolder,
                                Map<String, List<Folder>> packageMap);
 }