Node.js

Installing

Installing on Linux is simple, it will use nvm which is node version manager:

# Download and install nvm (May have to re-open terminal):
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash

# Download and install Node.js:
nvm install 22

# Verify the Node.js version:
node -v # Should print "v22.12.0".
nvm current # Should print "v22.12.0".

# Verify npm version:
npm -v # Should print "10.9.0".

Check version with:

node --version

Optimizations

Async IO

The need of non Blocking IO

If a user has sent a request to the server to receive data, but the server takes sometime to get and serve this data, what should the server do in the meantime? Hold the socket wnd wait for the data?

Doing this would block the IO for this user's request and waist valuable CPU time.

In order to execute any task, a thread is required, whether it is waiting for data, writing to a file, or reading from a something. Scaling an application using this synchronous model can be difficult.

Worker Threads (Multitasking)