Count task frequency in new task model

pkg/analyzer/lib/task/model.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.task.model;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/engine.dart' hide AnalysisTask;
 import 'package:analyzer/src/generated/java_engine.dart';
@@ skipping 31 matching lines @@
 }
 
 /**
  * An object used to compute one or more analysis results associated with a
  * single target.
  *
  * Clients are expected to extend this class when creating new tasks.
  */
 abstract class AnalysisTask {
   /**
+   * A table mapping the types of analysis tasks to the number of times each
+   * kind of task has been performed.
+   */
+  static final Map<Type, int> countMap = new HashMap<Type, int>();
+
+  /**
    * A table mapping the types of analysis tasks to stopwatches used to compute
    * how much time was spent executing each kind of task.
    */
   static final Map<Type, Stopwatch> stopwatchMap =
       new HashMap<Type, Stopwatch>();
 
   /**
    * The context in which the task is to be performed.
    */
   final AnalysisContext context;
@@ skipping 95 matching lines @@
   String toString() => description;
 
   /**
    * Perform this analysis task, ensuring that all exceptions are wrapped in an
    * [AnalysisException].
    *
    * Clients should not override this method.
    */
   void _safelyPerform() {
     try {
+      int count = countMap[runtimeType];
+      countMap[runtimeType] = count == null ? 1 : count + 1;
       Stopwatch stopwatch = stopwatchMap[runtimeType];
       if (stopwatch == null) {
         stopwatch = new Stopwatch();
         stopwatchMap[runtimeType] = stopwatch;
       }
       stopwatch.start();
       try {
         internalPerform();
       } finally {
         stopwatch.stop();
@@ skipping 155 matching lines @@
    * be computed, or `false` if the inputs have been computed.
    *
    * It is safe to invoke [moveNext] after it has returned `false`. In this case
    * [moveNext] has no effect and will again return `false`.
    *
    * Throws a [StateError] if the value of the current result has not been
    * provided using [currentValue].
    */
   bool moveNext();
 }