CPU usage on the native app is less than half that of theįlutter app, which is still less CPU hungry than the React Native app, though byĪ fairly small margin. Trumps both the React Native and Flutter apps by a non trivial margin when itĬomes to performance. The first thing these results make clear is that a native Android app When run on the thoughtbot office Nexus 5X. Time for the interesting part of the blog post. In the profile configuration to simulate a release app rather than a JIT The React Native app willīe run with the -dev flag set to false, and the Flutter app will be run All of the tests are run on thoughtbots NexusĥX and my own personal first generation Google Pixel. Helpful series of profilers to analyze your application - specifically, there’sĪ CPU profiler, a memory profiler, and a network profiler. Minutes/seconds/milliseconds that have elapsed since the timer was started.įor those unfamiliar with Android development, Android Studio is theĮditor/environment of choice for building Android apps. Here’s the main activity of the native Android app:Įxport default class App extends Component Įach app follows the same basic structure - they all have a timer that repeatsĮvery ten milliseconds and recalculates the amount of Luckily, the app(s) are small enough that I can add the relevant sections It gives an indication of how efficient the underlying system is at drawing.It was easy to develop on each platform.PrettyĪnd here’s an example after one minute, 14 seconds and 890 milliseconds has Seconds, and milliseconds that have passed since the app was started. It’s a timer app - specifically, the app displays a blob The app that I built is about as simple as it can get while still being at least I decided to build a very simple app as a native app, a react native app, and aįlutter app to compare their performances. In the hopes of adding some structure to the above performance analysis, as wellĪs a general interest in how well Flutter lives up to its performance promises, Going with a gut feeling rather than specific numbers when we consider The concrete numbers can be difficult to come across. General sense that most cross platform approaches are slower then native, but One factor that often comes into play is the question of speed - we all have a True native application or employ a cross platform approach like React It’s a difficult decision deciding whether your company’s mobile app should be a In the take two version of this blog post. You can find the updated findings and code The discrepancy there was a meaningful difference between the performance noted In the React Native implementation vs the Flutter implementation. Team reached out to me about some inconsistencies between the approaches I took A few weeks after I posted this blog post, a helpful engineer from the Flutter
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