export function printTime (t) {
  let time = Number(t)
  let units = ['n', 'μ', 'ms', 's']
  let unit = units[0]
  let unitPower = 1
  for (let i = 0; i < units.length; i++) {
    let power = Math.pow(10, (i + 1) * 3)
    if (power * 2 > time) {
      break
    }
    unitPower = power
    unit = units[i + 1]
  }
  console.log(t, '=', Number((time / unitPower).toFixed(2)), unit)
}