Hello, Angular enthusiasts! 👋 As developers, one of our top priorities is to optimize the performance of our application. Angular, being a complete framework, provides various tools and techniques to improve the performance of our web application. In this blog, we will explore some best practices which will help you optimize the performance of your Angular application. So, let’s get started! 💪

1. Lazy loading modules

Modules are an integral part of an Angular application and they are often used to organize code into logical units. However, loading all modules at once can lead to slower application performance. Lazy loading allows modules to be loaded only when needed, which can significantly improve the application’s performance.

A turtle taking a slow and steady approach to the race

2. AOT Compilation

Ahead-of-time (AOT) compilation is a compilation technique that compiles your Angular application’s code during the build process. This eliminates the need for the browser to compile your code at runtime, which can result in faster load times and improved performance.

An employee working hard to compile code

3. TrackBy function for ngFor

ngFor, a directive used to repeat a template over a collection, can be a bottleneck for performance if not used properly. One way to improve the performance of ngFor is to use a trackBy function. A trackBy function helps Angular identify which items have changed in a collection, resulting in fewer DOM manipulations and better performance.

A track athlete speeding towards the finish line

4. Zone.js optimization

Zone.js is a library that is included by default in an Angular application. It is responsible for triggering change detection in your application. However, it can also lead to performance issues. To optimize performance, we can avoid zones altogether by using the runOutsideAngular function.

A runner taking a detour to avoid obstacles during a race

5. Use OnPush change detection

Angular provides two types of change detection strategies: default and OnPush. The default strategy checks for changes in all components, which can be a bottleneck for performance. On the other hand, the OnPush strategy only checks for changes when a component’s inputs have changed or an event has been triggered. This can significantly improve the performance of your application.

A chess player making strategic moves

6. Use Pure Pipes

Pipes are used to transform data into a more desirable format. However, some pipes can be expensive and can lead to performance issues. To avoid this, you can use pure pipes. Pure pipes only get executed when their inputs change, resulting in better performance.

A chef adding spices to add more flavor to dishes

7. Use ngx-cacheable

Caching is an effective way of improving the performance of a web application. ngx-cacheable is a package that provides caching functionality for HTTP requests in Angular applications. It can significantly reduce the number of requests made to the server, leading to faster load times and better performance.

A person storing important data in a safe box for easy retrieval

That’s all, folks! We hope these Angular best practices will help you optimize the performance of your Angular application. Remember, optimizing your application’s performance is an ongoing process and requires continuous effort. So, keep learning and keep improving! 👍

An image of a superhero who has successfully optimized Angular performance