6 Tricks to Follow for Angular Performance Tuning [2023 Guide]


Angular is a powerful JavaScript framework for building web applications, but as with any framework, it’s important to make sure your application is running efficiently and at its best performance. However, with the increasing complexity of the angular app, its performance might suffer. We have some tips and tricks for Angular Performance Tuning that will help you improve the app’s performance.

6 Tricks to Follow for Angular Performance Tuning

In this article, we’ll provide some tips and best practices for tuning the performance of your Angular app. By following these guidelines, you can ensure that your app is running smoothly and providing the best user experience possible. Whether you’re building a small application or a large, complex one, these tips will help you optimise your Angular app for maximum performance. Let’s learn more about them.

Angular Performance Tuning Tips

In this article, we will help you with some tips through which you can increase the angular runtime performance. However, before you attempt to improve the runtime performance of your app, it’s recommended that you benchmark and compile your app using full optimization. Let’s see 6 tricks of efficient angular performance tuning:

  • Change Detection
  • Ensure to do Ahead-of-Time (AoT) Compilation:
  • OnPush& Immutability
  • Load Time Performance Optimization
  • Lazy loading for efficient program operation
  • Save Your Build from Memory Leak

Let’s learn about each of these tricks and how they work.

Change Detection

Change detection is a powerful mechanism in Angular that helps you optimise performance metrics. This mechanism detects new updates and entries and reflects the data changes in the component and automatically commands the app to show those updates in the view.

However, when the matter is of large scale or enterprise complex apps, the change detection mechanism also faces challenges. The frequency of

For example, it consistently skips to the main application component to verify and check the updates in its sub-components. In such situations, we can optimise processes by applying OnPuch and Immutability, Detach change detection, and Pipes rather than methods strategies.

Use AoT (Ahead-Of-Time) Compilation

Ahead-of-Time (AoT) compilation is a technique that can help improve the performance of your Angular app by pre-compiling your templates and components into efficient JavaScript code. AoT compilation can significantly reduce the amount of time it takes for your app to start up, as it eliminates the need for the browser to compile the templates and components at runtime.

To enable AoT compilation in your Angular app, you’ll need to use the Angular CLI (Command Line Interface) to build your app. The Angular CLI provides a number of options for building your app, including the –aot flag, which enables AoT compilation.

For example, to build your app for production using AoT compilation, you can use the following command:

ng build –prod –aot

This will build your app with AoT compilation enabled, resulting in faster startup times and improved performance.

It’s important to note that AoT compilation is only supported for templates and components written in the Angular template language. If you’re using third-party libraries or custom components written in JavaScript, they will not be compiled with AoT and will still need to be compiled at runtime.

Using OnPush& Immutability

Using the OnPush change detection strategy, along with immutability, can be an effective way to optimise the performance of your Angular app.

As we discussed earlier, the OnPush strategy tells Angular to only check for changes in a component’s inputs, rather than checking the entire component tree. This can help improve performance, especially if you have a large application with many components.

Immutability, on the other hand, refers to the practice of never modifying the state of an object. In Angular, this means that you should avoid mutating the data that your components rely on. Instead, you should create new objects whenever you need to update the data.

Here’s an example of how you might use theOnPush strategy and immutability together in an Angular component:

import { Component, ChangeDetectionStrategy, Input } from ‘@angular/core’;

selector: ‘app-my-component’,
templateUrl: ‘./my-component.component.html’,
styleUrls: [‘./my-component.component.css’],
changeDetection: ChangeDetectionStrategy.OnPush
export class MyComponentComponent {
@Input() data: any;

updateData() {
this.data = { …this.data, newProperty: ‘value’ };

In this example, the MyComponentComponent component is using the OnPush strategy, and the data input is being updated using the spread operator, which creates a new object rather than modifying the existing one. This helps ensure that Angular only performs change detection on this component when the input reference changes, and that the data being passed to the component is not being modified.

Load Time Performance Optimization

There are a number of techniques you can use to optimise the load time performance of your Angular app. Some of the most effective techniques include:

  • Minimizing the size of your bundles: You can use tools like the Angular CLI’s production build, which includes features like tree-shaking and minification, to reduce the size of your bundles and improve load time.
  • Lazy-loading modules: Rather than loading all of your app’s modules at once, you can use the Angular router to lazy-load modules on demand, which can improve load time.
  • Caching: Caching assets like images and fonts can help improve load time, as these assets won’t need to be re-downloaded each time the user visits your app.
  • Optimising images: Large images can significantly increase the size of your app’s bundles and impact load time. You can use tools like ImageOptim or Kraken to optimise your images and reduce their file sizes.

By using these techniques and others, you can improve the load time performance of your Angular app and provide a better user experience.

Lazy loading for efficient program operation

Lazy loading is a technique that can help improve the performance of your Angular app by loading modules on demand, rather than loading all modules at once. This can be especially useful if your app has a large number of modules, as it can reduce the initial load time of your app.

To implement lazy loading in your Angular app, you’ll need to use the Angular router. The router allows you to specify which modules should be lazily loaded, and it will handle the process of loading these modules as needed.

It’s important to note that lazy loading is only supported for modules, not for individual components. To lazy-load a component, you’ll need to create a module for it and then lazy-load the module using the router.

Lazy loading can be an effective way to improve the performance of your Angular app, especially if you have a large number of modules that are not needed on the initial load. It’s worth considering if you’re looking to optimise your app’s load time and overall performance.

Save Your Project from Memory Leak

Memory leaks can be a common issue in JavaScript applications, and they can have a negative impact on the performance of your Angular app. A memory leak occurs when an application continues to hold onto a memory that is no longer needed, causing the application to use more and more memory over time. This can lead to performance issues, such as slowdowns and crashes.

There are a number of techniques you can use to prevent memory leaks in your Angular app. The most efficient strategies include:

  • Unsubscribing from observables
  • Avoiding circular references
  • Using the ngOnDestroy lifecycle hook
  • Using the take until operator

By following these guidelines and others, you can help prevent memory leaks in your Angular app and improve its overall performance. It’s important to regularly monitor your app’s memory usage and look for potential leak sources.

Final Words

These are some of the best tips one can follow for Angular Performance Tuning. SmarshInfotech is a leading name in the field of IT services outsourcing companies. You can talk with our experts regarding the queries of your business project, we are always ready to help you! Let’s connect soon!


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