1 if performance? and performance.now
2 module.exports = -> performance.now()
3 else if process? and process.hrtime
4 module.exports = -> (getNanoSeconds() - loadTime) / 1e6
5 hrtime = process.hrtime
9 loadTime = getNanoSeconds()
11 module.exports = -> Date.now() - loadTime
14 module.exports = -> new Date().getTime() - loadTime
15 loadTime = new Date().getTime()