Use FastUri instead of Uri in analyzer.

pkg/analyzer/lib/src/context/source.dart

 // Copyright (c) 2015, 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 analyzer.src.context.source;
 
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart' as utils;
+import 'package:analyzer/src/util/fast_uri.dart';
 import 'package:package_config/packages.dart';
 
 /**
  * Instances of the class `SourceFactory` resolve possibly relative URI's
  * against an existing [Source].
  */
 class SourceFactoryImpl implements SourceFactory {
   /**
    * The analysis context that this source factory is associated with.
    */
@@ skipping 102 matching lines @@
   /**
    * Return a source object representing the given absolute URI, or `null` if
    * the URI is not a valid URI or if it is not an absolute URI.
    *
    * @param absoluteUri the absolute URI to be resolved
    * @return a source object representing the absolute URI
    */
   @override
   Source forUri(String absoluteUri) {
     try {
-      Uri uri = parseUriWithException(absoluteUri);
+      Uri uri = FastUri.parse(absoluteUri);
       if (uri.isAbsolute) {
         return _internalResolveUri(null, uri);
       }
     } catch (exception, stackTrace) {
       AnalysisEngine.instance.logger.logError(
           "Could not resolve URI: $absoluteUri",
           new CaughtException(exception, stackTrace));
     }
     return null;
   }
@@ skipping 54 matching lines @@
    * if either the [containedUri] is invalid or if it cannot be resolved against
    * the [containingSource]'s URI.
    */
   @override
   Source resolveUri(Source containingSource, String containedUri) {
     if (containedUri == null || containedUri.isEmpty) {
       return null;
     }
     try {
       // Force the creation of an escaped URI to deal with spaces, etc.
-      return _internalResolveUri(
-          containingSource, parseUriWithException(containedUri));
+      return _internalResolveUri(containingSource, FastUri.parse(containedUri));
     } on URISyntaxException {
       return null;
     } catch (exception, stackTrace) {
       String containingFullName =
           containingSource != null ? containingSource.fullName : '<null>';
       AnalysisEngine.instance.logger.logInformation(
           "Could not resolve URI ($containedUri) "
           "relative to source ($containingFullName)",
           new CaughtException(exception, stackTrace));
       return null;
@@ skipping 95 matching lines @@
       for (UriResolver resolver in resolvers) {
         Source result = resolver.resolveAbsolute(containedUri, actualUri);
         if (result != null) {
           return result;
         }
       }
       return null;
     });
   }
 }