Add perf test case.

.gitignore

@@ -1,3 +1,4 @@
+*.o
 bin
 obj
 *.userprefs

AppDelegate.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
 
 using Foundation;
 using UIKit;
@@ -9,18 +11,60 @@ public class AppDelegate : UIApplicationDelegate
 	UIWindow window;
 	UIViewController dvc;
 
+	static long totalMS;
+	static long iterations;
+
+	void Run ()
+	{
+		IntPtr array;
+		const int counter = 10000;
+		GC.Collect ();
+		createArguments (out array, counter);
+		try {
+			var watch = Stopwatch.StartNew ();
+			callSelector (Handle, array, counter);
+			watch.Stop ();
+			var lastAvg = totalMS / (double) iterations;
+			totalMS += watch.ElapsedMilliseconds;
+			iterations++;
+			var avg = totalMS / (double) iterations;
+			Console.WriteLine ("Did {0} iterations in {1}ms (average: {2:0.00}ms of {3} iterations, diff since last: {4:0.00})",
+			                   counter, watch.ElapsedMilliseconds, avg, iterations, avg - lastAvg);
+		} finally {
+			freeArguments (array, counter);
+		}
+		GC.Collect ();
+		NSTimer.CreateScheduledTimer (0.1, (v) => Run ());
+	}
+
 	public override bool FinishedLaunching (UIApplication app, NSDictionary options)
 	{
 		window = new UIWindow (UIScreen.MainScreen.Bounds);
 		window.RootViewController = dvc = new UIViewController ();
 		dvc.View.BackgroundColor = UIColor.White;
 		window.MakeKeyAndVisible ();
 
+		NSTimer.CreateScheduledTimer (0.1, (v) => Run ());
+
 		return true;
 	}
 
 	static void Main (string[] args)
 	{
 		UIApplication.Main (args, null, typeof (AppDelegate));
 	}
+
+	[Export ("callMe:")]
+	void CallMe (UIView view)
+	{
+	}
+
+	[DllImport ("__Internal")]
+	extern static void callSelector (IntPtr handle, IntPtr args, int counter);
+
+	[DllImport ("__Internal")]
+	extern static void createArguments (out IntPtr array, int counter);
+
+	[DllImport ("__Internal")]
+	extern static void freeArguments (IntPtr array, int counter);
 }

Makefile

@@ -11,4 +11,13 @@ archive:
 dev:
 	/Library/Frameworks/Mono.framework/Commands/xbuild /p:Platform=iPhone
 	/Library/Frameworks/Xamarin.iOS.framework/Versions/Current/bin/mtouch --installdev bin/iPhone/Debug/*.app
-	/Library/Frameworks/Xamarin.iOS.framework/Versions/Current/bin/mtouch --launchdev  $(shell /usr/libexec/PlistBuddy -c 'Print CFBundleIdentifier' bin/iPhone/Debug/*.app/Info.plist)
+	/Library/Frameworks/Xamarin.iOS.framework/Versions/Current/bin/mtouch --launchdev  $(shell /usr/libexec/PlistBuddy -c 'Print CFBundleIdentifier' bin/iPhone/Debug/*.app/Info.plist)
+
+libtestcode.o: libtestcode.dev.o libtestcode.sim.o
+	lipo -create -output $@ $?
+
+libtestcode.dev.o: testcode.m Makefile
+	clang -arch arm64 -c $< -o$@ -mios-simulator-version-min=6.0 -isysroot /Applications/Xcode10.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk
+
+libtestcode.sim.o: testcode.m Makefile
+	clang -arch x86_64 -c $< -o$@ -miphoneos-version-min=6.0 -isysroot /Applications/Xcode10.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk

testcode.m

@@ -0,0 +1,29 @@
+#include <Foundation/Foundation.h>
+#include <UIKit/UIKit.h>
+
+@interface CallMe : NSObject
+-(void) callMe: (NSObject *) obj;
+@end
+
+void
+callSelector (CallMe *obj, NSObject **args, int counter)
+{
+	for (int i = 0; i < counter; i++)
+		[obj callMe: args [i]];
+}
+
+void
+createArguments (NSObject ***array, int counter)
+{
+	*array = calloc (sizeof (NSObject *), counter + 1);
+	for (int i = 0; i < counter; i++)
+		(*array) [i] = [[UIView alloc] init];
+}
+
+void
+freeArguments (NSObject **array, int counter)
+{
+	for (int i = 0; i < counter; i++)
+		[array [i] release];
+	free (array);
+}

unified-test-app.csproj

@@ -24,11 +24,12 @@
     <MtouchArch>x86_64</MtouchArch>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <MtouchProfiling>true</MtouchProfiling>
-    <MtouchExtraArgs>--registrar:static --optimize:all</MtouchExtraArgs>
+    <MtouchExtraArgs>--gcc_flags -Wl,libtestcode.o</MtouchExtraArgs>
     <MtouchLink>Full</MtouchLink>
     <MtouchNoSymbolStrip>true</MtouchNoSymbolStrip>
     <CodesignKey>iPhone Developer</CodesignKey>
     <DeviceSpecificBuild>false</DeviceSpecificBuild>
+    <MtouchHttpClientHandler>HttpClientHandler</MtouchHttpClientHandler>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhoneSimulator' ">
     <DebugType>none</DebugType>
@@ -41,6 +42,7 @@
     <MtouchDebug>true</MtouchDebug>
     <MtouchExtraArgs></MtouchExtraArgs>
     <MtouchArch>x86_64</MtouchArch>
+    <MtouchHttpClientHandler>HttpClientHandler</MtouchHttpClientHandler>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhone' ">
     <DebugSymbols>True</DebugSymbols>
@@ -54,11 +56,12 @@
     <MtouchDebug>True</MtouchDebug>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <MtouchArch>ARM64</MtouchArch>
-    <MtouchExtraArgs></MtouchExtraArgs>
+    <MtouchExtraArgs>--gcc_flags -Wl,libtestcode.o</MtouchExtraArgs>
     <MtouchProfiling>true</MtouchProfiling>
     <MtouchLink>Full</MtouchLink>
     <MtouchNoSymbolStrip>true</MtouchNoSymbolStrip>
     <DeviceSpecificBuild>false</DeviceSpecificBuild>
+    <MtouchHttpClientHandler>HttpClientHandler</MtouchHttpClientHandler>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhone' ">
     <Optimize>False</Optimize>
@@ -69,13 +72,16 @@
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <MtouchArch>ARM64</MtouchArch>
     <DebugSymbols>true</DebugSymbols>
-    <MtouchExtraArgs></MtouchExtraArgs>
+    <MtouchExtraArgs>--gcc_flags -Wl,libtestcode.o</MtouchExtraArgs>
     <MtouchNoSymbolStrip>true</MtouchNoSymbolStrip>
     <MtouchLink>Full</MtouchLink>
+    <MtouchHttpClientHandler>HttpClientHandler</MtouchHttpClientHandler>
+    <MtouchUseLlvm>true</MtouchUseLlvm>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="Xamarin.iOS" />
     <Reference Include="System.Core" />
+    <Reference Include="System" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Info.plist" />