[tests] Add a Performance Test for FastDeploy Task (#9258)

We need to check the speed of the `<FastDeploy/>` Task to make sure
we do not regress.  This will also help us keep track of any
improvements we make. 

The timeout has been set to 20 seconds for an initial deploy on an
emulator to take into account the fact that the emulators are really
slow on CI.

tests/MSBuildDeviceIntegration/Tests/PerformanceTest.cs

@@ -58,6 +58,41 @@ void Profile (ProjectBuilder builder, Action<ProjectBuilder> action, [CallerMemb
 			}
 		}
 
+		void ProfileTask (ProjectBuilder builder, string task, int iterations, Action<ProjectBuilder> action, [CallerMemberName] string caller = null)
+		{
+			if (!csv_values.TryGetValue (caller, out int expected)) {
+				Assert.Fail ($"No timeout value found for a key of {caller}");
+			}
+			double total = 0;
+			for (int i=0; i < iterations; i++) {
+				action (builder);
+				var duration = GetTaskDurationFromBinLog (builder, task);
+				TestContext.Out.WriteLine($"run {i} took: {duration}ms");
+				total += duration;
+			}
+			total /= iterations;
+			TestContext.Out.WriteLine($"expected: {expected}ms, actual: {total}ms");
+			if (total > expected) {
+				Assert.Fail ($"Exceeded expected time of {expected}ms, actual {total}ms");
+			}
+		}
+
+		double GetTaskDurationFromBinLog (ProjectBuilder builder, string task)
+		{
+			var binlog = Path.Combine (Root, builder.ProjectDirectory, $"{Path.GetFileNameWithoutExtension (builder.BuildLogFile)}.binlog");
+			FileAssert.Exists (binlog);
+
+			var build = BinaryLog.ReadBuild (binlog);
+			var duration = build
+				.FindChildrenRecursive<Task> (t => t.Name == task)
+				.Aggregate (TimeSpan.Zero, (duration, target) => duration + target.Duration);
+
+			if (duration == TimeSpan.Zero)
+				throw new InvalidDataException ($"No task build duration found in {binlog}");
+
+			return duration.TotalMilliseconds;
+		}
+
 		double GetDurationFromBinLog (ProjectBuilder builder)
 		{
 			var binlog = Path.Combine (Root, builder.ProjectDirectory, $"{Path.GetFileNameWithoutExtension (builder.BuildLogFile)}.binlog");
@@ -332,5 +367,27 @@ public void Install_CSharp_Change ()
 				Profile (builder, b => b.Install (proj));
 			}
 		}
+
+		[Test]
+		[Category ("UsesDevice")]
+		[Retry (Retry)]
+		public void Install_CSharp_FromClean ()
+		{
+			AssertCommercialBuild (); // This test will fail without Fast Deployment
+
+			var proj = CreateApplicationProject ();
+			proj.PackageName = "com.xamarin.install_csharp_change";
+			proj.MainActivity = proj.DefaultMainActivity;
+			using (var builder = CreateBuilderWithoutLogFile ()) {
+				builder.BuildLogFile = "install.log";
+				builder.Verbosity = LoggerVerbosity.Quiet;
+				builder.Install (proj);
+				builder.AutomaticNuGetRestore = false;
+				ProfileTask (builder, "FastDeploy", 20, b => {
+					b.Uninstall (proj);
+					b.Install (proj);
+				});
+			}
+		}
 	}
 }

tests/msbuild-times-reference/MSBuildDeviceIntegration.csv

@@ -12,3 +12,5 @@ Build_JLO_Change,4500
 Build_XAML_Change,3000
 Install_CSharp_Change,4000
 Install_XAML_Change,3750
+Install_CSharp_FromClean,3000
+Install_CSharp_FromClean,20000