Minimal initial performance reporting

pkg/analyzer/lib/src/generated/engine.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine;
 
 import "dart:math" as math;
@@ skipping 10908 matching lines @@
     }
   }
 
   /**
    * Set the value of the data represented by the given [descriptor] to the
    * given [value].
    */
   void setValue(DataDescriptor /*<V>*/ descriptor, dynamic /*V*/ value) {
     CachedResult result =
         resultMap.putIfAbsent(descriptor, () => new CachedResult(descriptor));
+    if (result.state == CacheState.FLUSHED) {
+      int count = SourceEntry.unflushedCountMap[descriptor];
+      SourceEntry.unflushedCountMap[descriptor] = count == null ? 1 : count + 1;
+    }
     result.state = CacheState.VALID;
     result.value = value == null ? descriptor.defaultValue : value;
   }
 
   /**
    * Flush the value of the data described by the [descriptor].
    */
   void _flush(DataDescriptor descriptor) {
     CachedResult result = resultMap[descriptor];
     if (result != null && result.state == CacheState.VALID) {
@@ skipping 661 matching lines @@
       new DataDescriptor<LineInfo>("SourceEntry.LINE_INFO");
 
   /**
    * The index of the flag indicating whether the source was explicitly added to
    * the context or whether the source was implicitly added because it was
    * referenced by another source.
    */
   static int _EXPLICITLY_ADDED_FLAG = 0;
 
   /**
+   * A table mapping data descriptors to a count of the number of times a value
+   * of that kind was flushed and then re-created.
+   */
+  static final Map<DataDescriptor, int> unflushedCountMap =
+      new HashMap<DataDescriptor, int>();
+
+  /**
    * The most recent time at which the state of the source matched the state
    * represented by this entry.
    */
   int modificationTime = 0;
 
   /**
    * The exception that caused one or more values to have a state of
    * [CacheState.ERROR].
    */
   CaughtException exception;
@@ skipping 169 matching lines @@
    * Set the value of the data represented by the given [descriptor] to the
    * given [value].
    */
   void setValue(DataDescriptor /*<V>*/ descriptor, dynamic /*V*/ value) {
     if (!_isValidDescriptor(descriptor)) {
       throw new ArgumentError("Invalid descriptor: $descriptor");
     }
     _validateStateChange(descriptor, CacheState.VALID);
     CachedResult result =
         resultMap.putIfAbsent(descriptor, () => new CachedResult(descriptor));
+    if (result.state == CacheState.FLUSHED) {
+      int count = unflushedCountMap[descriptor];
+      unflushedCountMap[descriptor] = count == null ? 1 : count + 1;
+    }
     result.state = CacheState.VALID;
     result.value = value == null ? descriptor.defaultValue : value;
   }
 
   @override
   String toString() {
     StringBuffer buffer = new StringBuffer();
     _writeOn(buffer);
     return buffer.toString();
   }
@@ skipping 561 matching lines @@
     if (element.id == _id) {
       result = element;
       throw new _ElementByIdFinderException();
     }
     super.visitElement(element);
   }
 }
 
 class _ElementByIdFinderException {
 }