The Best 11 Tips To Boost An Angular Application Performance


It is a common saying among general computer users the React works faster than Angular and not the other way round. Post-scrutiny of the application, it has been revealed that there are certain common flaws which a developer makes when they deal with the framework underlying Angular. Application development becomes more efficient in Angular than anywhere else. One must make sure to get the right and reliable experts when they want to Hire Angular Developers.

Angular is both – a framework and a platform. It makes use of TypeScript and HTML to help in the development of single-page client applications. The Angular framework is made from Angular components that are arranged as NgModules. These NgModules gathers the codes and utilizes them as functional sets. The vast framework structure in Angular helps the application to function smoothly with better performance. 

There are different ways that can accelerate angular application performance. Some of the top eleven guidelines that can help to improve the efficiency and performance of an angular application are given below. 

1. Reutilizing components

The Angular application stores a large cache of irrelevant files in its database. The architecture of an Angular application can be made dependable and reusable through proper recycling of the code, functions, components, etc. 

The following pair of angular decorators, i.e. @Input and @Output, can enable data transference from one component to another component. 

Reutilizing the components in Angular can also help to make functions reusable.

2. Server-Side Rendering

Angular Universal can render angular applications compatible for server-side use with the Angular Universal. However, angular applications render toward the client-side of the server. It is used to develop SPAs or Single Page Applications through its execution over the browser. Single Page Applications function inside a browser and do not require page reloading on its use.


  • Fast loading of the initial page.
  • Search Engine Optimization (SEO)
  • SEO-facilitated web crawlers
  • Load Angular server-side

3. Disenrolling Visibilities

Unsubscribing observables can help to do the following –

  • Avoid application memory leakage.
  • Disenrolling from an enrolled subscription cancels and destroys their child subscribers.

4. Prevent Unwanted Files From The Central Stack

The main bundle of the application must contain essential files for its operation. Avoiding a collection of files with a large size footprint can enhance loading times. A lightened processing load in the application will improve its functions to manage other files. Deletion of unwanted files from the main stack can also help to improve the operation of the system.

5. Snowballing Layout Shifts

The image layouts need to be maintained to ensure a smooth and beautiful user experience. The dynamic tables data load and the images can dislocate the images from the page without having fixed lengths. The trackBy function chooses both – the item and the index like arguments to help return its unique identifier. ngForOf is an in-built directive that simplifies repetition on anything – whether an object or an array, to form a template for each element. The DoCheck directive enables the user to apply their custom change detection when Angular cannot identify the changes in the input property. The trackBy function in Angular can help trigger ngForOf in each of the ngDoCheck. It means that any change in the object property *ngFor triggers the trackBy function to enable the user to detect any changes in the object property. 

6. AOT Enablement

The Ahead Of Time or AOT Enablement helps in the development of an application bundle. The ahead-of-time or AOT compiler can change the TypeScript and Angular HTML codes to proficient codes in JavaScript. It does so before the browser can download it to run it during the building phase. This process helps to improve its rendering pace in the browser. The JIT or Just In Time technique of Angular forms an application bundle in run time, after which a browser downloads it to render it on the Web Page. Compilation of codes in JIT occurs when it is demanded and not before. Against constant bytecode interpretation on a method, the Just In Time technique compiles the bytecode into machine code when it is running. The small bundle size improves rendering operations as it identifies compilation errors.

7. OnPush – Change Detection Strategy

Angular makes use of a strategy to identify changes within its angular components — the default strategy ChangeDetectionStrategy.Default acts as a default component to track changes constantly. This strategy comes into action against the triggering of the change detection action after it has been applied. The OnPush change detection strategy instructs the change detection to overlook components that do not require alterations and focus on the following – 

Change in/on –

  • event click
  • Observable Subscribing
  • Component Input references

Angular keeps track of real possible changes in a component.

8. Change Detector Detachment

To avoid component checkup along with its sub-tree, one must detach the change detector. Thereby, when Angular detects changes in the components and the sub-tree, it will not apply the change detection technique. Some of its commands include – 

  1. checkNoChanges
  2. detectChanges
  3. detach
  4. markForCheck
  5. reattech

9. Lazy Load Images

When webpages load the content and images simultaneously, it costs the loading time. The parallel upload of both – content and images increases application response time through speed reduction. Several application programming interfaces or APIs keep working at the backend of the webpage. The lazy load image technique loads the images when they are needed. The rendering of the actual active image portion loads the image. Larger image sizes need more loading times that increase the delay in the page loading operation. The lazy load image technique can provide –

  • Hassle-free image loading
  • Fewer page load HTTPS calls
  • Swift Application Rendering

10. Angular Preloading

Preloading is the way angular modules load in the background. Such preloading modules take immediate action once the preparation of every eagerly loaded module is over. Some of the Angular preloading variations include –

  • Preloading modules
  • Preloading Component data
  • Preloading modules – The preloading module can improve the asynchronous initial loading pace of all the modules. However, the applications that carry a miniature bundle size with fewer modules can use these preloading modules. On the contrary, lazy loading involves loading the necessary modules while the other remaining modules fail to load by default.
  1. Preloading Component data – Resolver is a type of class that applies the Resolve interface in Angular Router. The Route Resolver brings the necessary data even before the component comes into function. It is a vital root module service that functions as a middleware for its execution on the preload of a component. Use a resolver to prevent rendering components with the help of preloading component data till the time it takes for the data to load. Conditional statements can perform with ease with the help of this Resolver.

The preloading in Angular involves a pair of strategies which includes – 

  • Build-In preloading strategies – The Preloading Component Data lacks PreloadAllModules or (default) Preloading.
  • Custom preloading strategies – The custom preloading strategies consist of preload, at last, Preload on event change, Preload after some time, or preload network quality.

11. Page Speed Insight

The Page Speed Insight from the house of Google checks the quality in the performance of an application – whether it works good or it runs poorly. The performance of the application is brought forward with the following six sections, which are –

  • First Contentful Paint
  • Time to Interactive
  • Speed Index
  • Total Blocking Time
  • Largest Contentful Paint
  • Cumulative Layout Shift 

These are some of the ways to improve the performance of an Angular application. The change detection strategy identifies necessary alterations when required. Users can apply these strategies to decrease loading times and increase the performance of an Angular application. Therefore, Hire Dedicated Developers must use an Angular application due to its extensive framework and complex integrative structures.

The Angular Application Summary In a Nutshell

In the above paragraphs, we have debated the top eleven tips that can improve the performance of an angular application. Angular is a vast program that carries both – a framework and a platform. Angular consists of vast caches of unused files in its database. However, the reusability in its coding and components can add versatility to programming. Angular can increase the page loading speed on a website. The AOT Enablement feature in Angular enhances the rendering speed in the browser. The JIT technique compiles the bytecode to machine code during its processing. The Change detection Strategy continually identifies alterations in the components of Angular. Lazy Load Images reduces loading time as it shows pictures when needed. Preloading modules increases the loading pace of all the modules.  The Route Resolver offers a preview functionality when the components are inactive.

Angular offers a vast range of features for developers to improve their SPA (or single-page applications). Angular consists of AJAX handling, modularization, dependency injection, templating, RESTful API handling, two-way binding, and lots more. So why wait when you can investigate Angular all by yourself? Either way, you can consult some professional web developer or angular development companies which can help you to investigate or explore the all-new and detailed features of the angular. Sometimes it looks like an easy task but it’s not. So to hire someone to helps you can be the best decision you can make.


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