Improve logging performance

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 202 matching lines @@
   void _safelyPerform() {
     try {
       //
       // Report that this task is being performed.
       //
       String contextName = context.name;
       if (contextName == null) {
         contextName = 'unnamed';
       }
       AnalysisEngine.instance.instrumentationService.logAnalysisTask(
-          contextName, description);
+          contextName, this);
       //
       // Gather statistics on the performance of the task.
       //
       int count = countMap[runtimeType];
       countMap[runtimeType] = count == null ? 1 : count + 1;
       Stopwatch stopwatch = stopwatchMap[runtimeType];
       if (stopwatch == null) {
         stopwatch = new Stopwatch();
         stopwatchMap[runtimeType] = stopwatch;
       }
@@ skipping 267 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();
 }