---
title: Angular Performance
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contributors:
  - tomalaforge
  - tomer953
description: Learn how to use the Angular Devtool chrome extension.
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sidebar:
  order: 1
---

import { LinkCard } from '@astrojs/starlight/components';

In this series of challenges about performance, you will learn how to optimize and enhance the performance of your Angular application.

Before starting to resolve any challenge, I invite you to download the [Angular DevTools Chrome extention](https://chrome.google.com/webstore/detail/angular-devtools/ienfalfjdbdpebioblfackkekamfmbnh) if you haven't already done so.

This extension allows you to profile your application and detect performance issues, which is very useful for understanding where performance issues can occur.

## How to use it

When you serve an Angular application, you can inspect a page by pressing <b>F12</b>, which will open the <b>Chrome developer tools</b>. Then navigate to the <b>Angular tab</b>. From there, you can select the <b>Profiler tab</b> as shown below.

![profiler tab](../../../../assets/performance/profiler-tab.png 'Profiler tab')

You can now profile your application by clicking on the record button. You can play with your application and see when change detection is triggered and which components are rerendered.

:::tip[Learn more]
You can learn more on the [documentation page](https://angular.io/guide/devtools).
:::

Now that you know how to use the <b>Angular DevTool</b>, you can choose a challenge, profile it, and resolve it.

<LinkCard
  title="🟢 Default vs OnPush"
  description="Learn the difference between Default and OnPush change detection strategies."
  href="/challenges/performance/34-default-onpush/"
/>

<LinkCard
  title="🟢 Memoization"
  description="Learn the power of pure pipes."
  href="/challenges/performance/35-memoize/"
/>

<LinkCard
  title="🟠 Optimize Change Detection"
  description="Learn how to remove zone pollution."
  href="/challenges/performance/12-scroll-cd/"
/>
