10 Tips on How to Optimize AngularJS App Performance in 2023

Your Google rankings, AdWords, Facebook ads, and all leads generated via your website are all affected by the speed and user experience of your web app. Therefore, using a strong web app-building framework is essential while constructing web applications.

AngularJS is one of the most prominent JavaScript frameworks around the world. It contains various attributes like directives, data binding, dependency injection, and superior MVC architectural implementation. And that’s why AngularJS is well known for creating high-performing apps and web solutions.

However, not everything is as perfect as it seems. The web apps created using AngularJS have started to get slow ever since their original release. Almost all developers have experienced performance problems with Angular.

But don’t worry. As a seasoned Angular development company, we frequently run into these performance problems in our projects and have several tricks and shortcuts to improve speed and performance.

As a result, we’ve developed a list of ten tips to boost AngularJS speed. These tips and solutions will help you solve the issues in your Angular web app and improve its performance.

Most Typical Angular Web App Performance Problems

Some of the most frequent problems that Angular web apps encounter are listed below:

• Excessive server use
• Sluggish page response
• Sudden app failure
• Frequent slowdowns
• The migrated technology is not producing the intended results
• Unexpected mistakes resulting from a real-time data stream

With the use of Angular optimization techniques, these problems can be resolved. Read our AngularJS vs ReactJS blog for a detailed explanation of this framework. In the following topic, we’ll demonstrate how to make your Angular app smaller, quicker, and more responsive. Let’s get going.

Top 10 Tips to Enhance AngularJS App Performance

Top 10 Tips to Enhance AngularJS App Performance

1. Pay Close Attention To Your AngularJS App’s Digest Cycle

The digest cycle is thought to be the most reliable indicator of how well an AngularJS application is doing. It is a looping cycle that verifies and keeps track of any changes to the variables. Therefore, the shorter your digest cycle will be the faster your software runs.

It will unquestionably enhance the functioning of the application and yield favorable client feedback. A well-performing app will immediately gain more users and increase its market share.

2. Put Limit On Watcher and Scope Usage

In most cases, having too many watchers is the primary cause of your app becoming slow. AngularJS employs dirty checking to keep track of all code changes. If two watchers are linked together, the digest cycle is repeated twice to guarantee that all data is up to date.

In big applications with several interconnected watchers, the digest cycle will continue to run until they are updated and stable. This will make the app lag a lot and make it slow. Therefore, you must limit the usage of watchers and scopes in your app.

We recommend keeping the number of watchers at under a few hundred to improve Angular JS performance.

3. Deactivate CSS

In AngularJS, you can utilize a directive as an element, attribute, CSS class, or comment. However, if you do not require CSS class and comment directives, you can disable them for improved speed.

When CSS is enabled, images and text take longer to load on the web apps. As a result, it’s best to disable it if you don’t need it or if you only require it sometimes. The reason is it helps your app to load faster.

4. Reduce DOM Access

The DOM is the core of your application, representing the complete ideology of the page documents. You may quickly access the DOM for AngularJS performance optimization suggestions and make changes to the page.

However, if these phases are not handled carefully, the DOM structure and nodes could be destroyed, which could be highly expensive. Therefore, you should only utilize DOM when absolutely essential. Additionally, to prevent difficulties, keep the DOM tree as minimal as possible.

5. Dismiss ng-model

The ng-model directive is used to connect data between the Model and View layers. Using ng-model-options, you may debounce the inputs. It will give you total control over the digest cycle’s timing and execution for that input.

Now, you can control how long your digest cycle lasts by setting a limit. By doing this, you can greatly enhance AngularJS performance and prevent UI lags.

6. Implement One-Time Binding

The majority of frameworks compel developers to use two-way data binding. It allows developers to load & change data as many times as they wanted. But it can also decrease the app’s performance at some point.

The AngularJS framework gives developers the option to bind the data only once to an object. You can accomplish this by placing a double colon before the value. Only one instance of the object’s data is provided to the user interface (UI) in one-time binding.

Such data doesn’t have an updating mechanism. This works best with data that just needs to be loaded once and doesn’t need to change over time. One-time data binding significantly boosts performance. Therefore, this is among the best AngularJS performance tips.

7. Rather Than Using ng-show, Use ng-if Or ng-switch

Every programming language relies heavily on conditionals. AngularJS development also follows the same pattern.

Developers utilize ng-show to check the supplied condition and show or hide the CSS display for that element. In contrast, ng-if manipulates a statement based on a single condition, while ng-switch is utilized when there are many criteria.

Therefore, to delete an element from the DOM, the developer must utilize ng-if and ng-switch. It’s a difficult task, hence, hire AngularJS developers for a seamless procedure.

8. Utilize External Performance-Improving Instruments

For improving code efficiency, we advise you to try third-party tools like Batarang, Chrome Profiler, and Timeline. With the help of these AngularJS performance enhancer tools, you may uncover code fragments that are degrading performance and possibly update your application to improve overall results.

The Record Allocation Timeline tool logs and examines each action taken by your application as it runs. It’s the ideal starting point for your investigation into alleged performance difficulties with your application.

While Chrome Prolifer is a useful tool with numerous sub-extensions, like Record Allocation Profiler, Memory Profiler, and Take Heap Snapshot, it will improve AngularJS performance.

Additionally, the Angular team’s Batarang Tool will help you locate and troubleshoot AngularJS performance bottlenecks.

9. AOT Collection

Typescript is the standard language for Angular. You must convert the Typescript code into JavaScript for the browser to interpret it and launch web apps. And for that, you’ll need the help of compilation.

There are two different compilation options offered by Angular: AOT (Ahead of time) and JIT (Just In Time).

You should use Ahead of time Compilation throughout the development phase. It solely generates compiling templates and uses the Angular compiler from the deployment package. This method improves application performance and cuts down on payload time.

10. Make Use of Lodash or Native JavaScript

The use of Lodash and the writing of code in native JavaScript will improve performance. Lodash is a JavaScript library that will rework the essential logic of your application. Using Lodash in place of the native AngularJS methods will conserve both time and memory.

Now, let’s look at a few AngularJS performance and testing tools.

Popular Performance Testing Tools for AngularJS Applications

Popular Performance Testing Tools for AngularJS Applications

1. Protractor

The Angular team has created the Protractor. This software package makes it simple to do automated end-to-end testing. Protractor is built on top of webDriverJS and Selenium server, so it has access to all of those functionalities. It means you can utilize the Selenium grid functionality to run tests in multiple browsers at once. You can even create your own test suites with Mocha or Jasmine.

2. WebdriverIO

The WebdriverIO tool enables you to control a browser or a mobile application with just a few lines of code. It gives the test code a clear, concise, and easy-to-read appearance. Developers can write asynchronous instructions synchronously using this integrated test runner. Because of this, the developers are free to ignore the racing conditions. Additionally, it handles the Selenium session and eliminates all the difficult setup efforts.

3. TestingWhiz

Due to its codeless scripting capability, TestingWhiz is one of the most user-friendly test automation solutions for AngularJS optimization. This tool provides an end-to-end testing solution for AngularJS web and mobile applications. Its codeless scripting capability makes it popular, particularly among non-programmers.

4. NightwatchJS

NightwatchJS is a modified version of the W3C webdriver API. This tool is simple to modify and customize and includes its own testing framework and assertions techniques. However, it lacks the level of assistance that WebDriverIO and Protractor have.

Conclusion

Despite your best efforts, not all of these Angular performance optimization suggestions can be applied in full to your app to enhance speed. You must apply the advice that will help your app and business while taking into account the needs of your app.

And it’s likely that after reading the aforementioned performance optimization advice, you now realize that it’s not as simple as it first appears to optimize the Angular app’s performance. It necessitates the skills and support of a seasoned professional who can assist you in optimizing your application to the greatest extent possible.

The Angular developers at Windzoon are masters in using AngularJS to create simple to enterprise-grade web applications. Visit windzoon.com to take advantage of our outstanding AngularJS development services and to request a quote.

Dharti Thakkar

Dharati Thakkar is professional PHP web developer with more than 8+ years of experience. She is mastered in computer application and started her career as a PHP developer. Dharati Thakkar has expertise in Laravel and many other PHP frameworks and likes to write blogs on this disciplines.