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diff --git a/OpenSim/Tests/Performance/NPCPerformanceTests.cs b/OpenSim/Tests/Performance/NPCPerformanceTests.cs
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+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Reflection;
+using log4net;
+using Nini.Config;
+using NUnit.Framework;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Framework.Communications;
+using OpenSim.Region.CoreModules.Avatar.Attachments;
+using OpenSim.Region.CoreModules.Avatar.AvatarFactory;
+using OpenSim.Region.CoreModules.Framework.InventoryAccess;
+using OpenSim.Region.CoreModules.Framework.UserManagement;
+using OpenSim.Region.CoreModules.ServiceConnectorsOut.Avatar;
+using OpenSim.Region.Framework.Interfaces;
+using OpenSim.Region.Framework.Scenes;
+using OpenSim.Region.OptionalModules.World.NPC;
+using OpenSim.Services.AvatarService;
+using OpenSim.Tests.Common;
+using OpenSim.Tests.Common.Mock;
+
+namespace OpenSim.Tests.Performance
+{
+    /// <summary>
+    /// NPC performance tests
+    /// </summary>
+    /// <remarks>
+    /// Don't rely on the numbers given by these tests - they will vary a lot depending on what is already cached,
+    /// how much memory is free, etc.  In some cases, later larger tests will apparently take less time than smaller
+    /// earlier tests.
+    /// </remarks>
+    [TestFixture]
+    public class NPCPerformanceTests
+    {
+        private TestScene scene;
+        private AvatarFactoryModule afm;
+        private UserManagementModule umm;
+        private AttachmentsModule am;
+
+        [TestFixtureSetUp]
+        public void FixtureInit()
+        {
+            // Don't allow tests to be bamboozled by asynchronous events.  Execute everything on the same thread.
+            Util.FireAndForgetMethod = FireAndForgetMethod.None;
+        }
+
+        [TestFixtureTearDown]
+        public void TearDown()
+        {
+            scene.Close();
+            scene = null;
+            GC.Collect();
+            GC.WaitForPendingFinalizers();
+
+            // We must set this back afterwards, otherwise later tests will fail since they're expecting multiple
+            // threads.  Possibly, later tests should be rewritten not to worry about such things.
+            Util.FireAndForgetMethod = Util.DefaultFireAndForgetMethod;
+        }
+
+        [SetUp]
+        public void Init()
+        {
+            IConfigSource config = new IniConfigSource();
+            config.AddConfig("NPC");
+            config.Configs["NPC"].Set("Enabled", "true");
+            config.AddConfig("Modules");
+            config.Configs["Modules"].Set("InventoryAccessModule", "BasicInventoryAccessModule");
+
+            afm = new AvatarFactoryModule();
+            umm = new UserManagementModule();
+            am = new AttachmentsModule();
+
+            scene = new SceneHelpers().SetupScene();
+            SceneHelpers.SetupSceneModules(scene, config, afm, umm, am, new BasicInventoryAccessModule(), new NPCModule());
+        }
+
+        [Test]
+        public void Test_0001_AddRemove100NPCs()
+        {
+            TestHelpers.InMethod();
+//            log4net.Config.XmlConfigurator.Configure();
+
+            TestAddRemoveNPCs(100);
+        }
+
+        [Test]
+        public void Test_0002_AddRemove1000NPCs()
+        {
+            TestHelpers.InMethod();
+//            log4net.Config.XmlConfigurator.Configure();
+
+            TestAddRemoveNPCs(1000);
+        }
+
+        [Test]
+        public void Test_0003_AddRemove2000NPCs()
+        {
+            TestHelpers.InMethod();
+//            log4net.Config.XmlConfigurator.Configure();
+
+            TestAddRemoveNPCs(2000);
+        }
+
+        private void TestAddRemoveNPCs(int numberOfNpcs)
+        {
+            ScenePresence sp = SceneHelpers.AddScenePresence(scene, TestHelpers.ParseTail(0x1));
+//            ScenePresence originalAvatar = scene.GetScenePresence(originalClient.AgentId);
+
+            // 8 is the index of the first baked texture in AvatarAppearance
+            UUID originalFace8TextureId = TestHelpers.ParseTail(0x10);
+            Primitive.TextureEntry originalTe = new Primitive.TextureEntry(UUID.Zero);
+            Primitive.TextureEntryFace originalTef = originalTe.CreateFace(8);
+            originalTef.TextureID = originalFace8TextureId;
+
+            // We also need to add the texture to the asset service, otherwise the AvatarFactoryModule will tell
+            // ScenePresence.SendInitialData() to reset our entire appearance.
+            scene.AssetService.Store(AssetHelpers.CreateNotecardAsset(originalFace8TextureId));
+
+            afm.SetAppearance(sp, originalTe, null);
+
+            INPCModule npcModule = scene.RequestModuleInterface<INPCModule>();
+
+            List<UUID> npcs = new List<UUID>();
+
+            long startGcMemory = GC.GetTotalMemory(true);
+            Stopwatch sw = new Stopwatch();
+            sw.Start();
+
+            for (int i = 0; i < numberOfNpcs; i++)
+            {
+                npcs.Add(
+                    npcModule.CreateNPC("John", "Smith", new Vector3(128, 128, 30), UUID.Zero, true, scene, sp.Appearance));
+            }
+
+            for (int i = 0; i < numberOfNpcs; i++)
+            {
+                Assert.That(npcs[i], Is.Not.Null);
+
+                ScenePresence npc = scene.GetScenePresence(npcs[i]);
+                Assert.That(npc, Is.Not.Null);
+            }
+
+            for (int i = 0; i < numberOfNpcs; i++)
+            {
+                Assert.That(npcModule.DeleteNPC(npcs[i], scene), Is.True);
+                ScenePresence npc = scene.GetScenePresence(npcs[i]);
+                Assert.That(npc, Is.Null);
+            }
+
+            sw.Stop();
+
+            long endGcMemory = GC.GetTotalMemory(true);
+
+            Console.WriteLine("Took {0} ms", sw.ElapsedMilliseconds);
+            Console.WriteLine(
+                "End {0} MB, Start {1} MB, Diff {2} MB",
+                endGcMemory / 1024 / 1024,
+                startGcMemory / 1024 / 1024,
+                (endGcMemory - startGcMemory) / 1024 / 1024);
+        }
+    }
+}
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