Implementing Performance Monitoring

import { PerformanceMonitor } from 'react-native-performance-monitor';

// Initialize performance monitoring
PerformanceMonitor.init({
  apiKey: 'your-api-key-here',
  endpoint: 'https://api.performance-monitor.com',
});

// Start monitoring
PerformanceMonitor.start();

import { AppRegistry, Performance } from 'react-native';\n\nPerformance.mark('app_start');\nAppRegistry.registerRunnable('App', () => <App />);\nPerformance.mark('app_ready');\nPerformance.measure('app_launch_time', 'app_start', 'app_ready');

import { PerformanceObserver, performance } from 'perf_hooks';

const observer = new PerformanceObserver((list) => {
  for (const entry of list.getEntries()) {
    console.log('Render time:', entry.duration);
  }
});

observer.observe({ entryTypes: ['render'] });

import { LogBox } from 'react-native';

LogBox.ignoreAllLogs(true);

// Enable profiling in dev mode
if (__DEV__) {
  const ReactNative = require('react-native');
  ReactNative.LogBox.ignoreAllLogs(true);
}

const startTime = Date.now();
fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => {
    const endTime = Date.now();
    console.log(`Request took ${endTime - startTime}ms`);
  });

const startTime = Date.now();
axios.get('https://api.example.com/data')
  .then(response => {
    const endTime = Date.now();
    console.log(`Request took ${endTime - startTime}ms`);
  });

import { PerformanceObserver, performance } from 'react-native';

const observer = new PerformanceObserver((list) => {
  list.getEntries().forEach((entry) => {
    if (entry.name === 'customMetric') {
      console.log('Custom Metric Value:', entry.duration);
    }
  });
});

observer.observe({ entryTypes: ['measure'] });

performance.mark('customMetricStart');
// Simulate some operation
setTimeout(() => {
  performance.mark('customMetricEnd');
  performance.measure('customMetric', 'customMetricStart', 'customMetricEnd');
}, 100);

// Install Flipper
npm install --save-dev flipper

// Enable in your app
import { NativeModules } from 'react-native';
const { Flipper } = NativeModules;

// Start profiling
Flipper.startProfiling();

const { getMemoryInfo } = require('react-native');

setInterval(() => {
  const memoryInfo = getMemoryInfo();
  console.log('Heap Used:', memoryInfo.heapUsed);
  console.log('Total Heap Size:', memoryInfo.totalHeapSize);
}, 5000);

import { AppState } from 'react-native';

let frameCount = 0;
let lastFrameTime = performance.now();

AppState.addEventListener('change', (state) => {
  if (state === 'active') {
    const frameRate = frameCount / ((performance.now() - lastFrameTime) / 1000);
    console.log(`Frames per second: ${frameRate.toFixed(2)}`);
  }
});

import { Flipper } from 'flipper-plugin-performance';

Flipper.addPlugin({
  name: 'Performance',
  version: '1.0.0',
  description: 'Monitor React Native app performance'
});

const memoryReport = {
  heapUsed: 45.2,
  heapTotal: 60.0,
  gcTime: 12
};

console.log(`Memory usage: ${memoryReport.heapUsed} MB`);