1- Unsubscribe not needed subscriptions of all observables in app, especially after disposing components (on ngOnDestroy hook).
2- Using trackBy in NgFor
3- Add Images and Some other URLs to cache urls in PWA configs
4- Detach manually “Change Detection” if not necessary
5- Use TinyPng Library for Minimizing Images, This is VS Code Extension
6- Use Web Workers
7- Use “Indexed DB” and “Sql.js” instead of always fetching data
