turn off instrumentated task cycle detection

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/context/AnalysisContextImpl.java

 /*
  * Copyright (c) 2012, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
@@ skipping 1905 matching lines @@
     long getStart = System.currentTimeMillis();
     AnalysisTask task = getNextAnalysisTask();
     long getEnd = System.currentTimeMillis();
     if (task == null && validateCacheConsistency()) {
       task = getNextAnalysisTask();
     }
     if (task == null) {
       return new AnalysisResult(getChangeNotices(true), getEnd - getStart, null, -1L);
     }
     String taskDescription = task.toString();
-    if (!reportedLoop && !recentTasks.add(taskDescription)) {
-      @SuppressWarnings("resource")
-      PrintStringWriter writer = new PrintStringWriter();
-      writer.print("Performing repeated task: ");
-      writer.println(taskDescription);
-      for (String description : recentTasks) {
-        writer.print("  ");
-        writer.println(description);
-      }
-      logInformation(writer.toString());
-    }
+//    if (!reportedLoop && !recentTasks.add(taskDescription)) {
+//      @SuppressWarnings("resource")
+//      PrintStringWriter writer = new PrintStringWriter();
+//      writer.print("Performing repeated task: ");
+//      writer.println(taskDescription);
+//      for (String description : recentTasks) {
+//        writer.print("  ");
+//        writer.println(description);
+//      }
+//      logInformation(writer.toString());
+//    }
     notifyAboutToPerformTask(taskDescription);
     if (TRACE_PERFORM_TASK) {
       System.out.println(taskDescription);
     }
     long performStart = System.currentTimeMillis();
     try {
       task.perform(resultRecorder);
     } catch (ObsoleteSourceAnalysisException exception) {
       AnalysisEngine.getInstance().getLogger().logInformation(
           "Could not perform analysis task: " + taskDescription,
@@ skipping 3916 matching lines @@
       writer.println(" missing sources");
       for (Source source : missingSources) {
         writer.print("    ");
         writer.println(source.getFullName());
       }
       logInformation(writer.toString());
     }
     return changedSources.size() > 0;
   }
 }