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Performance Markers for react native applications






This library created to enable production measurement of your react native application.

  • In the first phase (based on Parashuram's blog: React Native Performance Playbook) - I tried to measure the duration of app's startup time.
  • On the way, allow measurement of memory consumption, battery consumption and other footprints of your application.

Getting started

$ npm install react-native-perf-logger --save

Manual installation


[ WIP]

  1. In XCode, in the project navigator, right click LibrariesAdd Files to [your project's name]
  2. Go to node_modulesreact-native-perf-logger and add PerfLogger.xcodeproj
  3. In XCode, in the project navigator, select your project. Add libPerfLogger.a to your project's Build PhasesLink Binary With Libraries
  4. Run your project (Cmd+R)<


  1. Open up android/app/src/main/java/[...]/
  • Add import statements
import com.reactnativeperflogger.PerfLoggerPackage; 
import com.reactnativeperflogger.RNPerfLogger;

to the imports at the top of the file

  • Add private RNPerfLogger perfLogger
  • Add perfLogger = new RNPerfLogger(); to the first line of onCreate() method:
public void onCreate() {
  perfLogger = new RNPerfLogger();
  • Add new PerfLoggerPackage(perfLogger) to the list returned by the getPackages() method
  1. Append the following lines to android/settings.gradle:
    include ':react-native-perf-logger'
    project(':react-native-perf-logger').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-perf-logger/android')
  2. Insert the following lines inside the dependencies block in android/app/build.gradle:
      compile project(':react-native-perf-logger')


  1. Add a prop nativeID to the last view of the first screen of every loading flow of your application.
  render() {
    return (
  1. Register all such nativeIDs with

// you can register for multiple ids
const ids = ["myHomeScreen"]; 
  1. Register to TTI completed event, and get the JSON includes all the recorded markers:
import PerfLogger from 'react-native-perf-logger';
    PerfLogger.registerTTICompletedListener(async (id: string, time: string) => {
      console.log(`tti_complete time: ${time}`);
      const result = await PerfLogger.getAllMarkers();
      // you can use alternatively PerfLogger.getIntervalBounds()
      // to get start and end time of all completed interval measurements 
  1. Do whatever you want with the result (send to your server, send bi..)
  2. To force the logger stop listening to events and remove all stored data use: