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

pkg/analysis_server/lib/src/package_map_provider.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 package.map.provider;
 
+import 'dart:collection';
 import 'dart:convert';
 import 'dart:io' as io;
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/resource.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:path/path.dart';
 
 /**
  * A PackageMapProvider is an entity capable of determining the mapping from
@@ skipping 13 matching lines @@
  * Data structure output by PackageMapProvider.  This contains both the package
  * map and dependency information.
  */
 class PackageMapInfo {
   /**
    * The package map itself.  This is a map from package name to a list of
    * the folders containing source code for the package.
    *
    * `null` if an error occurred.
    */
-  Map<String, List<Folder>> packageMap;
+  HashMap<String, List<Folder>> packageMap;
 
   /**
    * Dependency information.  This is a set of the paths which were consulted
    * in order to generate the package map.  If any of these files is
    * modified, the package map will need to be regenerated.
    */
   Set<String> dependencies;
 
   PackageMapInfo(this.packageMap, this.dependencies);
 }
@@ skipping 67 matching lines @@
     // {
     //   "packages": {
     //     "foo": "path/to/foo",
     //     "bar": ["path/to/bar1", "path/to/bar2"],
     //     "myapp": "path/to/myapp",  // self link is included
     //   },
     //   "input_files": [
     //     "path/to/myapp/pubspec.lock"
     //   ]
     // }
-    Map<String, List<Folder>> packageMap = <String, List<Folder>>{};
-    Map obj = JSON.decode(jsonText);
-    Map packages = obj['packages'];
+    HashMap<String, List<Folder>> packageMap = new HashMap<String, List<Folder>>();
+    HashMap obj = JSON.decode(jsonText);
+    HashMap packages = obj['packages'];
     processPaths(String packageName, List paths) {
       List<Folder> folders = <Folder>[];
       for (var path in paths) {
         if (path is String) {
           Resource resource = resourceProvider.getResource(path);
           if (resource is Folder) {
             folders.add(resource);
           }
         }
       }
@@ skipping 13 matching lines @@
     if (inputFiles != null) {
       for (var path in inputFiles) {
         if (path is String) {
           dependencies.add(path);
         }
       }
     }
     return new PackageMapInfo(packageMap, dependencies);
   }
 }