CODE EXAMPLE FOR JAVASCRIPT

date and time javascript

// To test a function and get back its return
function printElapsedTime(fTest) {
  let nStartTime = Date.now(),
      vReturn = fTest(),
      nEndTime = Date.now()

  console.log(`Elapsed time: ${ String(nEndTime - nStartTime) } milliseconds`)
  return vReturn
}

let yourFunctionReturn = printElapsedTime(yourFunction)