A cool tool to test your web app performance in command line

you can use the following command to install this utility in your development manchine.

if you this package run globally

npm i autocannon -g

for the specific app only

npm i autocannon --save

To test the performance of the app that running in port 3000

autocannon http://localhost:3000

the execution outcome will be shown as below

for more specific information, you can visit the link below 

https://github.com/mcollina/autocannon