{"id":40341,"date":"2022-06-07T09:45:17","date_gmt":"2022-06-07T16:45:17","guid":{"rendered":"https:\/\/devblogs.microsoft.com\/dotnet\/?p=40341"},"modified":"2022-06-24T09:09:43","modified_gmt":"2022-06-24T16:09:43","slug":"performance-improvements-in-dotnet-maui","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/dotnet\/performance-improvements-in-dotnet-maui\/","title":{"rendered":"Performance Improvements in .NET MAUI"},"content":{"rendered":"

.NET Multi-platform App UI (MAUI) unifies Android, iOS, macOS, and Windows APIs into a single\nAPI so you can write one app that runs natively on many platforms. We are\nfocused on improving both your daily productivity\nas well as performance of your applications. Gains in developer\nproductivity, we believe, should not be at the cost of application\nperformance.<\/p>\n

The same could be said about application size — what overhead is\npresent in a blank .NET MAUI application? When we began optimizing\n.NET MAUI, it was clear that iOS had some work needed to improve\napplication size, while Android was lacking in startup performance.<\/p>\n

iOS application size of a dotnet new maui<\/code> project was originally\naround 18MB. Likewise .NET MAUI startup times on Android in earlier\npreviews were not looking too good:<\/p>\n\n\n\n\n\n\n\n\n\n\n
Application<\/th>\nFramework<\/th>\nStartup Time(ms)<\/th>\n<\/tr>\n<\/thead>\n
Xamarin.Android<\/td>\nXamarin<\/td>\n306.5<\/td>\n<\/tr>\n
Xamarin.Forms<\/td>\nXamarin<\/td>\n498.6<\/td>\n<\/tr>\n
Xamarin.Forms (Shell)<\/td>\nXamarin<\/td>\n817.7<\/td>\n<\/tr>\n
dotnet new android<\/td>\n.NET 6 (Early Preview)<\/td>\n210.5<\/td>\n<\/tr>\n
dotnet new maui<\/td>\n.NET 6 (Early Preview)<\/td>\n683.9<\/td>\n<\/tr>\n
.NET Podcast<\/a><\/td>\n.NET 6 (Early Preview)<\/td>\n1299.9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

This is an average of ten runs on a Pixel 5 device. See our\nmaui-profiling<\/a> repo for details on how these numbers were\nobtained.<\/p>\n

Our goal was for .NET MAUI to be faster<\/em> than its predecessor,\nXamarin.Forms, and it was clear that we had some work to do in .NET\nMAUI itself. The dotnet new android<\/code> template was already shaping up\nto launch faster than Xamarin.Android, mostly due to the new BCL and\nMono runtime in .NET 6.<\/p>\n

The dotnet new maui<\/code> template was not yet using the Shell<\/a>\nnavigation pattern, but plans were in the works for it to be the\ndefault navigation pattern in .NET MAUI. We knew there would be a\nperformance-hit in the template when we adopted this change.<\/p>\n

To arrive at where we are today, it was a collaboration of several\ndifferent teams. We improved areas like Microsoft.Extensions and\nDependencyInjection usage, AOT compilation, Java interop, XAML, code\nin .NET MAUI in general, and many more.<\/p>\n

After the dust settled, we arrived at a much better place:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Application<\/th>\nFramework<\/th>\nStartup Time(ms)<\/th>\n<\/tr>\n<\/thead>\n
Xamarin.Android<\/td>\nXamarin<\/td>\n306.5<\/td>\n<\/tr>\n
Xamarin.Forms<\/td>\nXamarin<\/td>\n498.6<\/td>\n<\/tr>\n
Xamarin.Forms (Shell)<\/td>\nXamarin<\/td>\n817.7<\/td>\n<\/tr>\n
dotnet new android<\/td>\n.NET 6 (MAUI GA)<\/td>\n182.8<\/td>\n<\/tr>\n
dotnet new maui (No Shell**)<\/td>\n.NET 6 (MAUI GA)<\/td>\n464.2<\/td>\n<\/tr>\n
dotnet new maui (Shell)<\/td>\n.NET 6 (MAUI GA)<\/td>\n568.1<\/td>\n<\/tr>\n
.NET Podcast App (Shell)<\/a><\/td>\n.NET 6 (MAUI GA)<\/td>\n814.2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

**<\/code> – this is the original dotnet new maui<\/code> template that is not using Shell<\/a>.<\/p>\n

Details below, enjoy!<\/p>\n

Table Of Contents<\/h2>\n

Startup Performance Improvements<\/p>\n