Comparing async vs sync functions in node.js

async-vs-sync.js

function sync(callback) {
  callback()
}

function async(callback) {
  process.nextTick(function() {
    callback()
  })
}

sync(function() {
  console.log('calling sync')
})
console.log('after sync')

console.log('------')

async(function() {
  console.log('calling async')
})
console.log('after async?')