Important facts about Angular AOT vs JIT compilation | AOT vs JIT in angular 14 Which one is better?

Angular is a popular front-end development framework that uses typescript. Angular Applications can be compiled via two processes. one is Ahead-of-Time (AOT) and the other is Just-in-Time (JIT) compilation.

Let’s understand both in detail.


AOT compilation

AOT compilation is the process of compiling the Angular application during the build process before the application is served to the users. This compilation converts the Angular templates into highly-optimized JavaScript code that can be executed by the browser more efficiently. This compiled code is smaller in size and provides better performance, especially on slower devices.

official doc link for AOT compilation.

JIT compilation

JIT compilation is the process of compiling the Angular application during runtime, as the user interacts with the application. The browser downloads the application code, compiles it, and then executes it. It provides faster build times and a better development experience, as it allows for faster iteration and debugging during development.

AOT vs JIT compilation

AOT compilation is mostly considered the more efficient compilation process. It is also much faster than the JIT compilation.

AOT compilation is better in the case of large application development.

AOT compiled code does not to recompiled on browser run time, it reduces the time of loading the application and it improves the overall performance.

But AOT takes a lot of time in the build process and it can also require some more configurations compared to the JIT compilation process.

The main advantage of JIT compilation is that it provides faster build and also flexibility. For smaller applications, JIT is a good choice, and for large applications, AOT is a good choice.

The JIT compilation process can take a lot of time during the run time, this will be no big issue if the application is small in size, but in the case of a large application, this compilation process can slow down the application’s performance.

Aot compilation improves security as well because the final build is a compiled code and this does not contain any Angular-specific syntax.

AOT vs JIT compilation both have their advantages and disadvantage, JIT compilation is generally faster and more flexible, while AOT compilation is generally more performant and secure.

So now you have quite an understanding of both the compilation process AOT and JIT. feel free to comment and share with your friends.

Also, read RxJS operators used for error handling in angular and Angular vs React full comparison.

Related Posts

How to use Chart.js version 2 & 3 in angular application | Create line, bar, pie, and other important types of charts using chart js angular application

Chart.js library is open-source to create interactive and beautiful charts for your angular application. These charts are not just static charts, these are data-driven charts. Using the…

rxjs operators

Most Important RxJS operators to handle errors in angular | 8 RxJS operators we can use to handle errors in Angular?

RxJS is a library that provides a set of operators for reactive programming in angular. It handles errors in a declarative way and this helps developers to…

angular icon

How to create Draggable Grid Blocks using angular-gridster2

To create Draggable Grid Blocks using angular-gridster2 first you need to Install the angular-gridster2 library by running npm install angular-gridster2 in your project’s root directory. You also…

Angular vs React js

What is the difference between Angular & React JS, Which one you should choose? | Angular 13 vs React JS full which one is better? Let’s compare

Angular & React JS both are used for Frontend Development, To make Single page applications or Web Apps. Here is a quick difference between both. Be a…

angular icon

What is Angular Framework? Why do we use Angular and What are the Advantages and Disadvantages? | Important info about the angular 14 framework and its cons and pros

Hi Everyone, In this blog, we will discuss about Angular Framework and this is going to be a brief blog about Angular and its pros and cons….

angular icon

Why toPromise is deprecated and Explain other options like firstValueFrom and lastValueFrom methods | toPromise deprecated in RxJS 7 and firstValueFrom and lastValueFrom is something we can use now

toPromise deprecated, yes you heard it right let’s know the reason in detail, but before this let me tell you what is toPromise method and why it…

Leave a Reply

Your email address will not be published. Required fields are marked *