如何在Ionic Application中记录应用程序加载时间？(在离子v3和离子v4中)

import { Platform, SplashScreen } from 'ionic-angular';

constructor(private platform: Platform, private splashScreen: SplashScreen) {
  // ...
}

this.platform.ready().then(() => {
  console.time('app-loading');
  // 其他初始化操作
  console.timeEnd('app-loading');
  this.splashScreen.hide();
});

import { Platform } from '@ionic/angular';
import { SplashScreen } from '@ionic-native/splash-screen/ngx';

constructor(private platform: Platform, private splashScreen: SplashScreen) {
  // ...
}

ngOnInit() {
  this.platform.ready().then(() => {
    console.time('app-loading');
    // 其他初始化操作
    console.timeEnd('app-loading');
    this.splashScreen.hide();
  });
}