From 4e34c0d2474eb5ea8ff0493778b6146b85f38846 Mon Sep 17 00:00:00 2001
From: "scheglov@google.com" <scheglov@google.com>
Date: Wed, 18 Feb 2015 01:12:43 +0000
Subject: [PATCH] Generate artificial hashCode for often used classes.

By avoiding calling Object.hashCode we analyze about 1% faster.

R=brianwilkerson@google.com, paulberry@google.com
BUG=

Review URL: https://codereview.chromium.org//934113002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@43832 260f80e4-7a28-3924-810f-c04153c831b5
---
 .../lib/src/services/index/index.dart               | 13 +++++++++++++
 pkg/analyzer/lib/src/generated/engine.dart          | 13 +++++++++++++
 pkg/analyzer/lib/src/generated/resolver.dart        | 13 +++++++++++++
 3 files changed, 39 insertions(+)

diff --git a/pkg/analysis_server/lib/src/services/index/index.dart b/pkg/analysis_server/lib/src/services/index/index.dart
index e80a190e328..cea7395cd6f 100644
--- a/pkg/analysis_server/lib/src/services/index/index.dart
+++ b/pkg/analysis_server/lib/src/services/index/index.dart
@@ -319,6 +319,16 @@ class Relationship {
    */
   static Map<String, Relationship> _RELATIONSHIP_MAP = {};
 
+  /**
+   * The next artificial hash code.
+   */
+  static int _NEXT_HASH_CODE = 0;
+
+  /**
+   * The artifitial hash code for this object.
+   */
+  final int _hashCode = _NEXT_HASH_CODE++;
+
   /**
    * The unique identifier for this relationship.
    */
@@ -329,6 +339,9 @@ class Relationship {
    */
   Relationship(this.identifier);
 
+  @override
+  int get hashCode => _hashCode;
+
   @override
   String toString() => identifier;
 
diff --git a/pkg/analyzer/lib/src/generated/engine.dart b/pkg/analyzer/lib/src/generated/engine.dart
index 32b9f69cbf8..5b43f575c5b 100644
--- a/pkg/analyzer/lib/src/generated/engine.dart
+++ b/pkg/analyzer/lib/src/generated/engine.dart
@@ -8663,6 +8663,16 @@ class DartEntry extends SourceEntry {
  * be stored in the cache.
  */
 class DataDescriptor<E> {
+  /**
+   * The next artificial hash code.
+   */
+  static int _NEXT_HASH_CODE = 0;
+
+  /**
+   * The artifitial hash code for this object.
+   */
+  final int _hashCode = _NEXT_HASH_CODE++;
+
   /**
    * The name of the descriptor, used for debugging purposes.
    */
@@ -8679,6 +8689,9 @@ class DataDescriptor<E> {
    */
   DataDescriptor(this._name, [this.defaultValue = null]);
 
+  @override
+  int get hashCode => _hashCode;
+
   @override
   String toString() => _name;
 }
diff --git a/pkg/analyzer/lib/src/generated/resolver.dart b/pkg/analyzer/lib/src/generated/resolver.dart
index 209e9fdcbe9..fc2696d417c 100644
--- a/pkg/analyzer/lib/src/generated/resolver.dart
+++ b/pkg/analyzer/lib/src/generated/resolver.dart
@@ -10077,6 +10077,16 @@ class ResolvableLibrary {
    */
   static List<ResolvableLibrary> _EMPTY_ARRAY = new List<ResolvableLibrary>(0);
 
+  /**
+   * The next artificial hash code.
+   */
+  static int _NEXT_HASH_CODE = 0;
+
+  /**
+   * The artifitial hash code for this object.
+   */
+  final int _hashCode = _NEXT_HASH_CODE++;
+
   /**
    * The source specifying the defining compilation unit of this library.
    */
@@ -10197,6 +10207,9 @@ class ResolvableLibrary {
    */
   List<ResolvableLibrary> get exports => _exportedLibraries;
 
+  @override
+  int get hashCode => _hashCode;
+
   /**
    * Set the libraries that are imported into this library to be those in the given array.
    *