Angular CLI installation and setup - Performance & Optimization

Performance: Angular CLI installation and setup

MEDIUM IMPACT

This affects the initial project setup speed and the size of the development environment, impacting how quickly you can start coding and testing.

Setting up a new Angular project

Angular

npm install -g @angular/cli@latest && ng new my-app

Installs dependencies automatically during project creation, reducing total setup time.

📈 Performance GainSingle install step, saves 10-15 seconds in setup

Setting up a new Angular project

Angular

npm install -g @angular/cli@latest && ng new my-app --skip-install && cd my-app && npm install

Skipping install during project creation causes an extra npm install step, delaying setup and increasing wait time.

📉 Performance CostBlocks setup for extra 10-15 seconds due to redundant install step

Performance Comparison

Pattern	Setup Time	Build Time	Bundle Size Impact	Verdict
Skipping install during ng new	Longer due to extra npm install	No direct impact	No impact	[X] Bad
Default ng new with install	Faster single step	No direct impact	No impact	[OK] Good
Global install with --force	Normal install time	Potential rebuild delays	No impact	[X] Bad
Global install without --force	Normal install time	Smooth builds	No impact	[OK] Good

Rendering Pipeline

Angular CLI installation and setup do not directly affect browser rendering but impact developer productivity and build times, which indirectly influence how fast the app can be served and updated.

→Build Process

→Dependency Installation

⚠️ BottleneckDependency installation and build time

Optimization Tips

1Run 'ng new' without --skip-install to avoid extra install steps.

2Install Angular CLI globally without --force for stable builds.

3Avoid redundant installs to speed up project setup.

Performance Quiz - 3 Questions

What is the performance impact of skipping dependency installation during 'ng new' and running it separately?

A It improves bundle size by delaying install.

B It reduces setup time by splitting tasks.

C It causes an extra install step, increasing setup time.

D It has no impact on performance.

DevTools: Network

How to check: Open DevTools Network panel during first app load after build; check for large bundle sizes or slow asset loading.

What to look for: Look for large main.js or vendor.js files that delay LCP; smaller bundles mean faster load.