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Angular Performance Optimization in 12 Easy Steps

iFour Team - January 19, 2023

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Angular Performance Optimization in 12 Easy Steps

Angular is a powerful front-end technology that is widely used for building dynamic and interactive web applications. Developed and maintained by Google, Angular is a complete rewrite of the popular AngularJS framework and is built on TypeScript, a superset of JavaScript. Angular uses a declarative approach for building UI, making it easier for developers to create complex, feature-rich applications with minimal code. Its powerful features, such as two-way data binding, dependency injection, and a rich set of built-in directives and components, make Angular an ideal choice for building modern web applications.

Angular is well-known not just for its simple development structure, but also for its ability to improve app performance. In this article, we will look at how to use Angular to solve the most common performance issues of an application.

Performance Optimization Techniques using Angular


#1 Use OnPush change detection.


Angular has a mechanism known as "default" change detection by default, which looks for changes in all components during every browser event. You may improve this by employing the OnPush technique, which checks for changes only when a certain event happens, such as when an input property changes or an event is sent.

#2 Lazy Loading


Lazy loading is a technique for loading parts of your application only when they are needed, rather than loading everything at once. This can significantly improve the performance of your application, especially for large and complex apps.

#3 Employ Angular CLI


The Angular CLI is a command-line interface that may help you develop, manage, and optimize your Angular application fast and simply. It has several performance-enhancing features, including AOT compilation and slow loading.

#4 Perform Ahead-of-Time (AOT) compilation


AOT compilation is a technique that compiles your Angular application at build time, rather than at runtime. This can greatly improve the performance of your application, as the browser doesn't need to spend time compiling the application before it can run.

#5 Use ngIf directive instead of *ngIf


ngIf directive is used to conditionally render elements in the template. It can be used to improve performance by avoiding unnecessary DOM updates.

#6 Utilize trackBy function in ngFor directive


The "trackBy" method lets you define a unique identifier for each item in the collection, allowing Angular to keep track of which items have been added or removed and only update the DOM components that have changed.

#7 Minimize the use of complex expressions and function calls


Complex expressions and function calls can slow down the rendering of your template. Try to use simpler expressions and function calls or move them to the component's class.

#8 Make use of immutable data


Using immutable data can improve performance by allowing Angular to detect and respond to changes more efficiently.

#9 Use memoization


Memoization is a technique for caching the results of a function call and reusing them when the same input is passed again. It can be used to improve the performance of expensive function calls.

#10 ngOnChanges lifecycle hook for properties


ngOnChanges lifecycle hook is used to detect and respond to changes in input properties. Use it to update the component's state and update the view, instead of using change detection in the constructor or ngOnInit.

#11 Use the Angular profiler


Angular profiler is a powerful tool that can help you identify performance bottlenecks in your application and optimize its performance.

#12 Use ngZone


ngZone is a wrapper around the JavaScript zone.js library, which allows you to run code in a different zone, such as the Angular zone, that has its own change detection mechanism. This can be used to improve the performance of your application by reducing the number of change detection cycles.

How Two-way data binding in Angular speeds up web development?


Angular's two-way data binding speeds up web development by allowing model updates to instantly update the view and view changes to automatically update the model. This eliminates the need for developers to manually update the view or model whenever changes occur, saving time and lowering the possibility of mistakes.

For two-way data binding, Angular includes two powerful features: Property Binding and Event Binding. Property binding allows you to connect the value of a DOM element's property to a value in the class of your component. You may tie the value of an event to a method in the class of your component using event binding.

Angular Popularity 2022
Two-way data binding

This automatic synchronization of data between the model and view also improves the overall maintainability of the application, as developers can focus on the logic of the application rather than the details of how data is being updated in the view.

Overall, two-way data binding in Angular can save significant development time and effort by simplifying the process of keeping the view and model in sync, improving the overall maintainability and ease of use of the application.

Searching for an eminent Angular development company?

Why do experts recommend using Angular for web app development?


Angular is a popular framework for web application development because of its comprehensive feature set and ease of use. Some of the key features that make Angular well-suited for web app development include:

Model-View-Controller (MVC) architecture: Angular follows the MVC architectural pattern, which separates the application logic into different components, making it easy to understand and maintain.

Two-way data binding: Angular's two-way data binding feature allows for the automatic synchronization of data between the model and view, which improves the overall maintainability of the application and saves development time.

Dynamic loading: Angular allows for the dynamic loading of modules, which means that only the necessary modules are loaded when needed, reducing the initial load time, and improving performance.

Directives: Angular provides a set of built-in directives that allow for the creation of dynamic and responsive web applications, such as ngIf and ngFor.

Dependency injection: Angular's built-in dependency injection system allows for easy management of dependencies across the application, which improves the overall structure and organization of the code.

Angular Popularity 2022
Angular features

Server-side rendering: Angular allows for server-side rendering of the application, which means that the initial HTML is generated on the server and sent to the client, resulting in faster load times and improved SEO.

TypeScript: Angular is built in TypeScript, which gives developers a robust type of system and increased code quality, making it simpler to identify issues early in the development process.

Large community: Angular has a large and active community, which provides developers with access to a wealth of tutorials, documentation, and resources, making it easy to learn and get started with the framework.

Overall, Angular's comprehensive feature set, ease of use, and large community make it a popular choice for web application development.

Conclusion


Angular is an essential tool for any developer looking to create cutting-edge web applications. It is a powerful technology that allows developers to build dynamic, responsive web applications with ease. With its intuitive framework and efficient data binding capabilities, Angular makes it simple to create complex, feature-rich applications that are both fast and reliable.

Its modular architecture and reusable components allow for efficient code organization, making it easy to maintain and scale your applications. Additionally, Angular's extensive library of tools and features, such as dependency injection and two-way data binding, allows developers to easily implement advanced functionality, resulting in a great user experience.

In this blog, we explored some of the finest Angular optimization strategies for resolving the most common performance concerns of an application.

Angular Performance Optimization in 12 Easy Steps Table of Content 1.Top trends that drive the adoption of LFA 1.1. Use OnPush change detection. 1.2. Lazy Loading 1.3. Employ Angular CLI 1.4. Perform Ahead-of-Time (AOT) compilation 1.5. Use ngIf directive instead of *ngIf 1.6. Utilize trackBy function in ngFor directive 1.7. Minimize the use of complex expressions and function calls 1.8. Make use of immutable data 1.9. Use memoization 1.10. ngOnChanges lifecycle hook for properties 1.11. Use the Angular profiler 1.12. Use ngZone 2.How Two-way data binding in Angular speeds up web development? 3.Why do experts recommend using Angular for web app development? 4.Conclusion Angular is a powerful front-end technology that is widely used for building dynamic and interactive web applications. Developed and maintained by Google, Angular is a complete rewrite of the popular AngularJS framework and is built on TypeScript, a superset of JavaScript. Angular uses a declarative approach for building UI, making it easier for developers to create complex, feature-rich applications with minimal code. Its powerful features, such as two-way data binding, dependency injection, and a rich set of built-in directives and components, make Angular an ideal choice for building modern web applications. Angular is well-known not just for its simple development structure, but also for its ability to improve app performance. In this article, we will look at how to use Angular to solve the most common performance issues of an application. Performance Optimization Techniques using Angular #1 Use OnPush change detection. Angular has a mechanism known as "default" change detection by default, which looks for changes in all components during every browser event. You may improve this by employing the OnPush technique, which checks for changes only when a certain event happens, such as when an input property changes or an event is sent. #2 Lazy Loading Lazy loading is a technique for loading parts of your application only when they are needed, rather than loading everything at once. This can significantly improve the performance of your application, especially for large and complex apps. #3 Employ Angular CLI The Angular CLI is a command-line interface that may help you develop, manage, and optimize your Angular application fast and simply. It has several performance-enhancing features, including AOT compilation and slow loading. #4 Perform Ahead-of-Time (AOT) compilation AOT compilation is a technique that compiles your Angular application at build time, rather than at runtime. This can greatly improve the performance of your application, as the browser doesn't need to spend time compiling the application before it can run. Looking to hire experienced Angular developers for your project? Contact us #5 Use ngIf directive instead of *ngIf ngIf directive is used to conditionally render elements in the template. It can be used to improve performance by avoiding unnecessary DOM updates. #6 Utilize trackBy function in ngFor directive The "trackBy" method lets you define a unique identifier for each item in the collection, allowing Angular to keep track of which items have been added or removed and only update the DOM components that have changed. #7 Minimize the use of complex expressions and function calls Complex expressions and function calls can slow down the rendering of your template. Try to use simpler expressions and function calls or move them to the component's class. #8 Make use of immutable data Using immutable data can improve performance by allowing Angular to detect and respond to changes more efficiently. #9 Use memoization Memoization is a technique for caching the results of a function call and reusing them when the same input is passed again. It can be used to improve the performance of expensive function calls. #10 ngOnChanges lifecycle hook for properties ngOnChanges lifecycle hook is used to detect and respond to changes in input properties. Use it to update the component's state and update the view, instead of using change detection in the constructor or ngOnInit. Read More: Will Angular remain popular in 2023? How and why? #11 Use the Angular profiler Angular profiler is a powerful tool that can help you identify performance bottlenecks in your application and optimize its performance. #12 Use ngZone ngZone is a wrapper around the JavaScript zone.js library, which allows you to run code in a different zone, such as the Angular zone, that has its own change detection mechanism. This can be used to improve the performance of your application by reducing the number of change detection cycles. How Two-way data binding in Angular speeds up web development? Angular's two-way data binding speeds up web development by allowing model updates to instantly update the view and view changes to automatically update the model. This eliminates the need for developers to manually update the view or model whenever changes occur, saving time and lowering the possibility of mistakes. For two-way data binding, Angular includes two powerful features: Property Binding and Event Binding. Property binding allows you to connect the value of a DOM element's property to a value in the class of your component. You may tie the value of an event to a method in the class of your component using event binding. Two-way data binding This automatic synchronization of data between the model and view also improves the overall maintainability of the application, as developers can focus on the logic of the application rather than the details of how data is being updated in the view. Overall, two-way data binding in Angular can save significant development time and effort by simplifying the process of keeping the view and model in sync, improving the overall maintainability and ease of use of the application. Searching for an eminent Angular development company? Reach out us Why do experts recommend using Angular for web app development? Angular is a popular framework for web application development because of its comprehensive feature set and ease of use. Some of the key features that make Angular well-suited for web app development include: Model-View-Controller (MVC) architecture: Angular follows the MVC architectural pattern, which separates the application logic into different components, making it easy to understand and maintain. Two-way data binding: Angular's two-way data binding feature allows for the automatic synchronization of data between the model and view, which improves the overall maintainability of the application and saves development time. Dynamic loading: Angular allows for the dynamic loading of modules, which means that only the necessary modules are loaded when needed, reducing the initial load time, and improving performance. Directives: Angular provides a set of built-in directives that allow for the creation of dynamic and responsive web applications, such as ngIf and ngFor. Dependency injection: Angular's built-in dependency injection system allows for easy management of dependencies across the application, which improves the overall structure and organization of the code. Angular features Server-side rendering: Angular allows for server-side rendering of the application, which means that the initial HTML is generated on the server and sent to the client, resulting in faster load times and improved SEO. TypeScript: Angular is built in TypeScript, which gives developers a robust type of system and increased code quality, making it simpler to identify issues early in the development process. Read More: Upgrading from AngularJS to Angular 11: Key points to remember Large community: Angular has a large and active community, which provides developers with access to a wealth of tutorials, documentation, and resources, making it easy to learn and get started with the framework. Overall, Angular's comprehensive feature set, ease of use, and large community make it a popular choice for web application development. Conclusion Angular is an essential tool for any developer looking to create cutting-edge web applications. It is a powerful technology that allows developers to build dynamic, responsive web applications with ease. With its intuitive framework and efficient data binding capabilities, Angular makes it simple to create complex, feature-rich applications that are both fast and reliable. Its modular architecture and reusable components allow for efficient code organization, making it easy to maintain and scale your applications. Additionally, Angular's extensive library of tools and features, such as dependency injection and two-way data binding, allows developers to easily implement advanced functionality, resulting in a great user experience. In this blog, we explored some of the finest Angular optimization strategies for resolving the most common performance concerns of an application.

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