default.js

import got from 'got'

main()
async function main() {
  const URLS = [
    'https://www.peterbe.com',
    'https://docs.github.com/en',
    'https://developer.mozilla.org',
    'https://primer.style/',
  ]

  console.time()
  // const sizes = await getSizes(URLS)
  const sizes = await getSizes_async(URLS)
  console.log(
    'SIZES',
    sizes,
    'TOTAL',
    sizes.reduce((a, b) => a + b, 0)
  )
  console.timeEnd()
}

async function getSizes(urls) {
  const sizes = []
  for (const url of urls) {
    sizes.push(await getSize(url))
  }
  return sizes
}

async function getSize(url) {
  const r = await got(url)
  console.log('FINISHED', url)
  return r.body.length
}

async function getSizes_async(urls) {
  const promises = []
  for (const url of urls) {
    promises.push(getSize(url))
  }
  return await Promise.all(promises)
}