Using underscore to make sense of `window.performance.timing`

timer.js

function pairs(value, key) {
  return [value, key]
}

function nonZero(array) {
  return array[0] !== 0
}

function relativeTime(item, index, list) {
  var time = item[0]
    , name = item[1]
  
  time = (time - list[0][0]) / 1000
  return [time, name]
}

function log(item, index, list) {
  console.log(item[0], item[1])
}

_.chain(window.performance.timing).map(pairs).sort().filter(nonZero).map(relativeTime).map(log)

Output: