{"id":42998,"date":"2022-11-03T10:01:00","date_gmt":"2022-11-03T17:01:00","guid":{"rendered":"https:\/\/devblogs.microsoft.com\/dotnet\/?p=42998"},"modified":"2022-11-03T19:34:14","modified_gmt":"2022-11-04T02:34:14","slug":"dotnet-7-performance-improvements-in-dotnet-maui","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/dotnet\/dotnet-7-performance-improvements-in-dotnet-maui\/","title":{"rendered":".NET 7 Performance Improvements in .NET MAUI"},"content":{"rendered":"

When .NET MAUI reached GA, we had goals of improving upon\nXamarin.Forms in startup time and application size. See last release’s\nPerformance Improvements in .NET MAUI<\/a>, to learn about the\nperformance benefits of migrating from Xamarin.Android, Xamarin.iOS,\nor Xamarin.Forms to .NET 6+ and .NET MAUI.<\/p>\n

We continued with these themes in .NET 7, building upon the excellent\n.NET performance work described by Stephen Toub<\/a>. General\nimprovements in the .NET runtime or base class libraries (BCL) lay the\nfoundation for the performance we are able to achieve in .NET MAUI.<\/p>\n

For Android, our focus remains on startup performance, since\napplication size is in a good place. For iOS, we have the opposite\ngoal: we continued to focus on application size, since startup\nperformance on iOS is in good shape.<\/p>\n

From customer feedback we found the need to go beyond just startup\nperformance, also focusing a bit on general UI performance, layout,\nscrolling, etc. We also improved startup time and general performance\nfor desktop platforms. We hope to continue making improvements in\nthese areas in future .NET releases.<\/p>\n

For an overall comparison of startup time between .NET 6 and .NET 7,\napps in Release<\/code> mode on a Pixel 5:<\/p>\n\n\n\n\n\n\n\n\n
Application<\/th>\nVersion<\/th>\nStartup Time(ms)<\/th>\n<\/tr>\n<\/thead>\n
dotnet new maui<\/td>\n.NET 6<\/td>\n568.1<\/td>\n<\/tr>\n
dotnet new maui<\/td>\n.NET 7<\/td>\n545.4<\/td>\n<\/tr>\n
.NET Podcast<\/td>\n.NET 6<\/td>\n814.2<\/td>\n<\/tr>\n
.NET Podcast<\/td>\n.NET 7<\/td>\n759.7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

In .NET 7, .NET MAUI applications should see an improvement to startup\ntime as well as smoothing scrolling, navigation, and general UI\nperformance.<\/p>\n

Likewise, iOS applications have continued to get smaller in .NET 7:<\/p>\n\n\n\n\n\n\n\n\n
Application<\/th>\nVersion<\/th>\n.ipa<\/code> Size (MB)<\/th>\n<\/tr>\n<\/thead>\n
dotnet new maui<\/td>\n.NET 6<\/td>\n12.64<\/td>\n<\/tr>\n
dotnet new maui<\/td>\n.NET 7<\/td>\n12.48<\/td>\n<\/tr>\n
.NET Podcast<\/td>\n.NET 6<\/td>\n25.08<\/td>\n<\/tr>\n
.NET Podcast<\/td>\n.NET 7<\/td>\n23.91<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Testing a CollectionView<\/code> sample<\/a> on a modest\nAndroid device (Pixel 4a). We can see a clear improvement with\nAndroid’s visual GPU profiler<\/a>, a screenshot taken\nduring some “brisk” scrolling:<\/p>\n

\"Android<\/p>\n

This sample is a CollectionView<\/code> with 10,000 rows of two data-bound\nlabels.<\/p>\n

Simply updating to .NET 7 should result in smaller\/faster .NET MAUI\napplications. Details below!<\/p>\n

Table Of Contents<\/h2>\n

Scrolling and Layout Performance Improvements<\/p>\n