Use explicit keys for often accessed closures

Author: kevmoo

lib/src/model.dart

@@ -1560,8 +1560,8 @@ abstract class GetterSetterCombo implements ModelElement {
     if (targetClass.name == target.name) {
       return original.replaceAll(constructorName, "${target.linkedName}");
     }
-    return original.replaceAll(
-        "${targetClass.name}.${target.name}", "${targetClass.linkedName}.${target.linkedName}");
+    return original.replaceAll("${targetClass.name}.${target.name}",
+        "${targetClass.linkedName}.${target.linkedName}");
   }
 
   String _constantValueBase() {
@@ -2892,7 +2892,8 @@ abstract class ModelElement extends Canonicalization
   ///
   /// For example: libraryName.className.methodName
   @override
-  String get fullyQualifiedName => _memoizer.memoized(_buildFullyQualifiedName);
+  String get fullyQualifiedName => _memoizer.memoized(_buildFullyQualifiedName,
+      altKey: 'fullyQualifiedName');
 
   String _fullyQualifiedNameWithoutLibrary() {
     // Remember, periods are legal in library names.
@@ -2904,7 +2905,8 @@ abstract class ModelElement extends Canonicalization
   // library.fullyQualifiedName seems somehow to break things.
   //String get fullyQualifiedNameWithoutLibrary => _memoizer.memoized2(fullyQualifiedName.replaceFirst, "${library.fullyQualifiedName}.", '');
   String get fullyQualifiedNameWithoutLibrary =>
-      _memoizer.memoized(_fullyQualifiedNameWithoutLibrary);
+      _memoizer.memoized(_fullyQualifiedNameWithoutLibrary,
+          altKey: 'fullyQualifiedNameWithoutLibrary');
 
   String get sourceFileName => element.source.fullName;
 

lib/src/model_utils.dart

@@ -7,6 +7,7 @@ library dartdoc.model_utils;
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:io';
+import 'dart:mirrors';
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
@@ -266,8 +267,9 @@ class Memoizer {
 
   /// Calls and caches the return value of [f]() if not in the cache, then
   /// returns the cached value of [f]().
-  R memoized<R>(Function f) {
-    _HashableList key = new _HashableList([f]);
+  R memoized<R>(Function f, {String altKey}) {
+    Object obj = altKey ?? f;
+    _HashableList key = new _HashableList([obj]);
     return _cacheIfAbsent(key, f);
   }