Why should I make my next mobile app in Xamarin? #Part1: Xamarin Performance

In this series of articles we are going to deeply analyze why it should be convenient for you (or not) developing a Mobile App using Xamarin.

One of the main doubts that is often raised by anyone I speak about Xamarin with is about the app performance.

I found an interesting in-depth review which analyses the differences between Xamarin’s Android and Java Android performance, as well as the differences between iOS native code and Xamarin’s iOS.

This is the test which involves Java (Android):


And this is the test that puts in comparison iOS native code and Xamarin’s C#:


In both case Xamarin is able to almost match the performance granted by the native platform itself, and frankly that’s quite awesome considering that Xamarin is still a young platform and has a lot of space to grow in the near future. In a few cases Xamarin even outperformed the native platform.

You can find the detailed performance comparison here: https://medium.com/@harrycheung/cross-platform-mobile-performance-testing-d0454f5cd4e9

And the github repo with the code used during the test here: https://github.com/harrycheung/Mobile-App-Performance

See you on the next post, and happy coding! πŸ™‚

New video shows Windows 10 for phones features

As you should already know, Windows 10 for Phones was released today for a small amount of phones. These are:

  • Lumia 630

  • Lumia 635

  • Lumia 636

  • Lumia 638

  • Lumia 730

  • Lumia 830

In case you don’t own any of these device or don’t want to risk the daily usability of your only Lumia phone, you can watch a video below here which shows the main capabilities of the just released Windows 10 for phones πŸ™‚

Happy watching πŸ™‚

Xamarin.Forms updated to 1.3.3 :)

This evening Xamarin Forms, the best tool offered by Xamarin to build native UIs for iOS, Android and Windows Phone from a single, shared C# codebase, picked up an update which bumps its version number up to the 1.3.3 version. You can find a detailed changelog at this link:


or just below here πŸ™‚

Release Notes

## Enhancements ##

– Deeply nested Grid performance enhanced

## Bug Fixes ##

– [Bug 21606](https://bugzilla.xamarin.com/show_bug.cgi?id=21606) – Page Title not updating when set in OnAppearing() Method the second time page is displayed. (iOS)
– [Bug 20798](https://bugzilla.xamarin.com/show_bug.cgi?id=20798) – ListView TextCell.DetailProperty only wraps on Android
– [Bug 24777](https://bugzilla.xamarin.com/show_bug.cgi?id=24777) – jobject must not be IntPtr.Zero exception when replacing Content of a Page
– [Bug 26214](https://bugzilla.xamarin.com/show_bug.cgi?id=26214) – On Android, InputTransparent=true does not work with ScrollView
– [Bug 22673](https://bugzilla.xamarin.com/show_bug.cgi?id=22673) – Initially hidden BoxView when made visible does not render (but does take up space in the UI)
– [Bug 25703](https://bugzilla.xamarin.com/show_bug.cgi?id=25703) – Webview waits to load the content until webviews on previous pages are loaded
– [Bug 26139](https://bugzilla.xamarin.com/show_bug.cgi?id=26139) – Navigation.RemovePage() still shows the back button on Android
– [Bug 26304](https://bugzilla.xamarin.com/show_bug.cgi?id=26304) – System.ArgumentNullException thrown when moving items in an ObservableCollection that is observed by a ListView
– [Bug 26064](https://bugzilla.xamarin.com/show_bug.cgi?id=26064) – ListView, ImageCell and disabled source cache and same image url leads to degraded performance
– [Bug 26121](https://bugzilla.xamarin.com/show_bug.cgi?id=26121) – Android ListView.ScrollTo doesn’t work when ListView inside TabbedPage
– [Bug 26501](https://bugzilla.xamarin.com/show_bug.cgi?id=26501) – Context Actions cause views to be hidden on iOS after re-use
– [Bug 23585](https://bugzilla.xamarin.com/show_bug.cgi?id=23585) – [Android] ListView not updated when ObservableCollection is modified

## Other Fixes ##

– [Core] CarouselPage now has more informative error when used without Children
– [Android] BoldItalic text now works as expected
– [Android] HeaderCells no longer tapable in TableView
– [Android] Fix NullReferenceException when re-using ListView on second page
– [iOS] SearchBar cancel button hides if there is nothing to clear
– [iOS] EntryCell Completed event fires twice
– [iOS] Fix potential crash with Editor inside of a ScrollView
– [iOS] Fix potential crash when ScrollView is inside of ViewCell
– [iOS] Fix issue where ContextActions could end up out of order
– [WP] Keyboard action for search does not match other platforms
– [Xaml] Text as content property now properly trims whitespace
– [Xaml] Duplicate x:Name’s throw a more informative error now
– [Xaml] Better error on Type mismatch for

Update it asap and tell us if anything improved in your everyday Forms coding! πŸ™‚