Use FlushTargetFilter to pre-filter targets before checking their results.

pkg/analysis_server/lib/src/operation/operation_analysis.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 operation.analysis;
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computer/computer_highlights.dart';
 import 'package:analysis_server/src/computer/computer_highlights2.dart';
 import 'package:analysis_server/src/computer/computer_outline.dart';
 import 'package:analysis_server/src/computer/computer_overrides.dart';
 import 'package:analysis_server/src/context_manager.dart';
 import 'package:analysis_server/src/domains/analysis/implemented_dart.dart';
 import 'package:analysis_server/src/domains/analysis/navigation.dart';
 import 'package:analysis_server/src/domains/analysis/occurrences.dart';
 import 'package:analysis_server/src/operation/operation.dart';
 import 'package:analysis_server/src/protocol_server.dart' as protocol;
 import 'package:analysis_server/src/services/dependencies/library_dependencies.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/task/dart.dart';
 import 'package:analyzer/task/model.dart';
 
 /**
  * Runs the given function [f] with the working cache size in [context].
  * Returns the result of [f] invocation.
  */
 runWithWorkingCacheSize(AnalysisContext context, f()) {
   int currentCacheSize = context.analysisOptions.cacheSize;
   if (currentCacheSize < PerformAnalysisOperation.WORKING_CACHE_SIZE) {
     setCacheSize(context, PerformAnalysisOperation.WORKING_CACHE_SIZE);
@@ skipping 357 matching lines @@
 
   /**
    * Flush some of the [context] cache results, which we probably not
    * going to use anymore.
    */
   void _flushCache(AnalysisServer server) {
     if (context is InternalAnalysisContext) {
       InternalAnalysisContext context = this.context;
       // Flush AST results for source outside of the analysis roots.
       ContextManager contextManager = server.contextManager;
-      context.analysisCache.flush((target, result) {
-        Source targetSource = target.source;
-        if (result is ResultDescriptor<CompilationUnit> &&
-            targetSource != null &&
-            !context.prioritySources.contains(targetSource) &&
-            !contextManager.isInAnalysisRoot(targetSource.fullName)) {
-          return true;
+      context.analysisCache.flush((target) {
+        if (target is Source || target is LibrarySpecificUnit) {
+          Source targetSource = target.source;
+          return !context.prioritySources.contains(targetSource) &&
+              !contextManager.isInAnalysisRoot(targetSource.fullName);
         }
         return false;
+      }, (target, result) {
+        return result is ResultDescriptor<CompilationUnit>;
       });
     }
   }
 
   /**
    * Send the information in the given list of notices back to the client.
    */
   void _sendNotices(AnalysisServer server, List<ChangeNotice> notices) {
     for (int i = 0; i < notices.length; i++) {
       ChangeNotice notice = notices[i];
@@ skipping 139 matching lines @@
 abstract class _SingleFileOperation extends SourceSensitiveOperation {
   final String file;
 
   _SingleFileOperation(AnalysisContext context, this.file) : super(context);
 
   @override
   bool shouldBeDiscardedOnSourceChange(Source source) {
     return source.fullName == file;
   }
 }