To instrument Time To Full Display (TTFD), call reportFullyDrawn() in your Activity after all your content is on screen. This can take a while on slow networks and can depend on what surface your users land on. TTFD captures the time when your app has completed rendering and is ready for user interaction and consumption, perhaps including content from disk or the network. The reported log line looks similar to the following example: ActivityManager: Displayed /.StartupTiming: +3s534ms Time To Full Display (TTFD) In Android 4.4 (API level 19) and higher, Logcat provides a “ Displayed” value capturing the time elapsed between launching the process and the completion of drawing the first frame of the corresponding activity on the screen. TTID should be when users can navigate around and get to where they want to go. TTID captures the time for your app to draw its background, navigation, any fast-loading local content, placeholders for slower local content or content coming from the network. You can quickly test your changes and measure the impact on startup times. Measuring your app startup time locally on your own device is a good idea when you are implementing optimizations on your app. How to measure the Startup Times (locally) Let’s explore the different ways to measure and improve the App Startup time (AKA launch time or launch performance),īy starting with instrumentation, you can prove there is an opportunity, you can identify where to focus your efforts, and you can see how much you’ve improved things as you start optimizing. This sort of poor experience may cause a user to rate your app poorly on the Play store, or even abandon your app altogether. An app with a slow start time doesn’t meet this expectation and can be disappointing to users. Users expect apps to be responsive and fast to load.
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