mattleibow

C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\generator.exe obj\Release\monoandroid90\api.xml --codegen-target=XAJavaInterop1 --csdir=obj\Release\monoandroid90\generated\src --enumdir=obj\Release\monoandroid90\generated\enums --enummetadata=obj\Release\monoandroid90\generated\metadata --assembly=Xamarin.AndroidX.Leanback.Preference --ref="C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\MonoAndroid\v1.0\mscorlib.dll" --ref="C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\MonoAndroid\v1.0\Java.Interop.dll" --ref="C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\MonoAndroid\v9.0\Mono.Android.dll" --ref="C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\MonoAndroid\v1.0\mscorlib.dll" --ref="C:\Program Files (x86)

mattleibow

 System.NotSupportedException: Unable to activate instance of type SkiaSharp.Views.Forms.SKCanvasViewRenderer from native handle 0xffc8386c (key_handle 0xf5d58bf). ---> System.MissingMethodException: No constructor found for SkiaSharp.Views.Forms.SKCanvasViewRenderer::.ctor(System.IntPtr, Android.Runtime.JniHandleOwnership) ---> Java.Interop.JavaLocationException: Exception of type 'Java.Interop.JavaLocationException' was thrown.
    --- End of inner exception stack trace ---
   at Java.Interop.TypeManager.CreateProxy (System.Type type, System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x000b5] in <bf995bc83cf844998720216d8171be13>:0
   at Java.Interop.TypeManager.CreateInstance (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer, System.Type targetType) [0x00111] in <bf995bc83cf844998720216d8171be13>:0
    --- End of inner exception stack trace ---
   at Java.Interop.TypeManager.CreateInstance (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer, System.Type tar

mattleibow

using System;
using System.Runtime.InteropServices;

namespace ConsoleApp1
{
	unsafe class Program
	{
		private static readonly IntPtr libSkiaSharp;

		static Program()

mattleibow

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Running;

namespace SkiaSharp.Benchmarks
{
	//[SimpleJob(RuntimeMoniker.CoreRt31)]
	[SimpleJob(RuntimeMoniker.Mono)]
	[SimpleJob(RuntimeMoniker.Net472)]
	[SimpleJob(RuntimeMoniker.NetCoreApp31)]

mattleibow

public class FrameCounter
{
	private readonly int sampleCount;
	private int index;
	private int sum;
	private readonly int[] samples;

	private int lastTick;

	public FrameCounter(int sampleCount = 100)

mattleibow

Xamarin.Forms Profiling

Before doing any profiling with this API, you probably can have a look at what the individual platforms have because they will have far more data and numbers:

• Android
  • https://docs.microsoft.com/en-us/xamarin/android/deploy-test/profiling
  • https://docs.microsoft.com/en-us/xamarin/tools/profiler
  • https://github.com/xamarin/xamarin-android/blob/master/Documentation/guides/profiling.md
• iOS
  • https://docs.microsoft.com/en-us/xamarin/ios/deploy-test/using-instruments-to-detect-native-leaks-using-markheap

mattleibow

Mono log profiler data
	Profiler version: 3.0
	Data version: 17
	Arguments: log:calls,output=/data/user/0/com.companyname.skiasharpsample/files/.__override__/profile.mlpd
	Architecture: armv8
	Operating system: linux
	Mean timer overhead: 176 nanoseconds
	Program startup: Wed Jul 22 03:03:10 2020
	Program ID: 21041

mattleibow

dotnet.js:2413 L: GC_MAJOR_SWEEP: major size: 34864K in use: 60350K
dotnet.js:2413 L: GC_MAJOR: (LOS overflow) time 120.31ms, stw 120.32ms los size: 1024K in use: 139K
dotnet.js:1855 Stacktrace: 

dotnet.js:1855 Error
    at 2242 (dotnet.js:1855)
    at _emscripten_asm_const_iii (dotnet.js:1864)
    at :63559/<anonymous>:wasm-function[448]:0xfcc8
    at :63559/<anonymous>:wasm-function[20099]:0x558739
    at :63559/<anonymous>:wasm-function[20605]:0x56897d

mattleibow

using System;
using System.IO;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;
using SkiaSharp;
using SkiaSharp.Views.UWP;
using Windows.Graphics.Display;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

mattleibow

=== Visual Studio Community 2019 for Mac ===

Version 8.6.5 (build 23)
Installation UUID: 3f35a65c-55b3-47ea-8af2-82f13c147479
	GTK+ 2.24.23 (Raleigh theme)
	Xamarin.Mac 6.18.0.23 (d16-6 / 088c73638)

	Package version: 610000104

=== Mono Framework MDK ===