Simply convert the "high-resolution real time" (difference) provided by NodeJS to an understandable value.

convertHrTimeToMs.coffee

exports.convertHrTimeToMs = (hrtime) =>
	diff = process.hrtime(hrtime)
	return parseInt((diff[0] * 1e9 + diff[1]) * 1e-6)

use.coffee

convertHrTimeToMs = require("./convertHrTimeToMs.coffee").convertHrTimeToMs

time = process.hrtime()

setTimeout () =>
    console.log convertHrTimeToMs time
    #output 1253 (ms) for example
, 1250 #ms