iOS jank - Reproducible example

• Flutter

  1,203 161,934 10.0 Dart

  Flutter makes it easy and fast to build beautiful apps for mobile and beyond

  

Well, after reading the shader compilation PSA on flutter.dev, they aren't going to work with the "ubershader" AKA SkiaSL interpreter on GPU, because there is no way to know if the effort of porting a Skia SL interpreter as a shader program would run fast enough on regular phones, and the time needed to compile this shader would be quite a big chunk of the start-up time. I wonder if you can AOT this on Apple's infrastructure and deliver using features like Google Play's distribution. Considering there is like 20 iPhone models, they might just be okay to just AOT compile the shader.

• engine

  48 7,125 10.0 C++

  The Flutter engine (by flutter)

  

Specifically to iOS, there was a change about a year ago when we switched the default from OpenGL to Metal on iOS (https://github.com/flutter/engine/pull/17431). As a result, we (unintentionally) lost one of the layers of caching of shaders due to lack of support in Metal/Skia. This made one cause of "first run jank” happen on every run on iOS. This is not the only performance issue you may ever encounter (and often isn’t the root cause of reported instances of jank), but is a specific issue we are addressing through planned architectural changes I will discuss below.

• InfluxDB

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• flutter-engines-no-metal

  1 82 0.0

  Compiled flutter engines with metal disabled for iOS

according google devs not recommend to use it, but my short-term solution is disabling metal and use opengl. I use this version: https://github.com/acoutts/flutter-engines-no-metal/tree/master/1.22.3 of the engine and haven't any problems with animations and performance. Right now my app using by 1000 iOS users and about 2000 android users. Another think you can try is run animations behind the splash screen. Here is example and it work! https://gist.github.com/Renesanse/1572e5090075fd79251d4fd4543d7274

• gallery

  44 6,088 0.0 Dart

  Discontinued Flutter Gallery was a resource to help developers evaluate and use Flutter

  

You can build it yourself from https://github.com/flutter/gallery or of course use gallery.flutter.dev (for the web version).

• warmup_routine

  2 42 0.0 Dart

  A library for handling animation warmup generically as discussed in: https://github.com/flutter/flutter/issues/76180

I see that some great guy fond a feasible workaround for `first run junk` issue https://github.com/danReynolds/warmup_routine

• SaaSHub

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