![]() ![]() It provides helpful functionality such as metrics for individual method performance as well as infrastructure to monitor and visualize the performance of different parts of the app. Firebase Performance Libraryįirebase Performance library is included in Google’s Firebase suite of products to measure and send metrics about the performance of the apps. The major app startup offenders included Firebase Performance library initialization, feature flag migration, and initial user loading. Here is the updated initialization code where we added logging for the three aforementioned steps: So we decided to measure the different steps of app startup using scenarios and scenario steps in production. It would be a fool’s errand to try and profile that many configurations. Dropbox Android application has over 1 billion installs on Google Play Store, spanning multiple types of devices, some of them old Nexus 5s, and others the newest and greatest Google devices. The problem with profiling the performance with this approach was that our test phones would not give us a statistically significant sampling of how well the app startup is actually doing. We started our investigation by leveraging the profiling tools in Android Studio to measure performance on our test phones. Examining our initialization code, we identified the main events that happen during our app initialization. App startup requires many different steps on the device before the main app screen is shown to the user and the application is ready for user interaction. While other features, such as app startup, are a lot more complicated to measure. Some features in the application can be relatively simple to measure, such as how long an API call to the server takes. ![]()
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