node. JS Learning Note (1)--What is node. js?

What is node. js?

Nodejs is a JavaScript toolkit for writing high-performance Web servers (for JS development service-side programs)

Single-threaded, asynchronous, event-driven

Features: fast, memory-consuming

A millions concurrency test on the web, which consumes 16G of memory without optimization, is due to the asynchronous processing of events after single-threaded polling, with each asynchronous event opening up an area of memory.

node. js vs php

Advantages:

High performance (mechanism issues)

High development efficiency (save a lot of optimization)

Wide range of applications, can develop desktop systems, electron frame

Disadvantages:

New, less people

Less middleware

IDE is not perfect

node. js's weaknesses and solutions

Multicore is not supported by default, but can be resolved with cluster

Server clusters are not supported by default, Node-http-proxy can resolve

Using Nginx for load balancing, statically handled by Nginx and dynamically handled by node. js

Forever or Node-cluster for disaster recovery

node. JS Learning Note (1)--What is node. js?