With Angular CLI, generating a new app and installing dependencies takes 30 seconds. Creating a production build takes another 15 seconds. And the best part is that the size of the deployed app can be as small as 55KB gzipped. Let’s do it.

1. Generate a minimalistic app with the inline template and styles with the following Angular CLI command:

ng new hello-world --minimal

2. If you’re not creating custom decorators and perform the AoT build, you don’t need to import the reflect polyfill, so comment out the following line in the generated file polyfills.ts:

import 'core-js/es7/reflect';

3. In the generated file app.component.ts remove most of the HTML markup from the component template so it looks as follows:

template: `Welcome to {{title}}!`

4. Make a production build (it performs the AoT compilation by default):

ng build -prod

5. The npm package serve is a small web server that can gzip static files on the fly. Install it globally:

npm install serve -g

6. Change to the dist directory where the application bundles were generated and serve the app (it’ll run on port 5000 by default):

serve .

7. Enjoy the small size!

To see it in action, watch this 5-minute video.

Update. Hello World in the upcoming rendering engine Ivy is only 3.3KB!

See https://ng-ivy-demo.firebaseapp.com/