HTTP_Timings.js

const http = require('https')

// Nanoseconds per second 1000000
const NS_PER_SEC = 1e6
// In order to convert to ms, process.hrtime() must be declared previously
const time = process.hrtime();

// Gather the data
const req = http.request(process.argv[2], res => {
    res.setEncoding('utf8')
    console.log(`Site HTTP: ${res.statusCode} (${res.statusMessage})`)
    res.once('readable', () => {
        let diff = process.hrtime(time)
        console.log(`Time took to receive readable data: ${diff[1] / NS_PER_SEC} ms`);
    })
        // "Chunks" are pieces of data
    res.on('data', chunk => {
        console.log(`Recieved ${chunk.length} bytes of data chunks`)
    })
    res.on('end', () => {
        let diff = process.hrtime(time)
        console.log(`Total response: ${diff[1] / NS_PER_SEC} ms`)
    })
})

// You can manipiluate the data using Node's Stream API
req.on('socket', socket => {
    socket.on('lookup', () => {
        let diff = process.hrtime(time)
        console.log(`DNS Lookup took: ${diff[1] / NS_PER_SEC} ms`)
    })
    socket.on('connect', () => {
        let diff = process.hrtime(time)
        console.log(`TCP connection took: ${diff[1] / NS_PER_SEC} ms`)
    })
    socket.on('secureConnect', () => {
        let diff = process.hrtime(time)
        console.log(`TLS certificate confirmation took: ${diff[1] / NS_PER_SEC} ms`)
    })
})

req.on('error', err => {
    console.log(`Problem with: ${err.message}`)
})

req.end()