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node_modules/performance-now/src/performance-now.coffee 553 Bytes
aaac7fed   liuqimichale   add
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  if performance? and performance.now
    module.exports = -> performance.now()
  else if process? and process.hrtime
    module.exports = -> (getNanoSeconds() - nodeLoadTime) / 1e6
    hrtime = process.hrtime
    getNanoSeconds = ->
      hr = hrtime()
      hr[0] * 1e9 + hr[1]
    moduleLoadTime = getNanoSeconds()
    upTime = process.uptime() * 1e9
    nodeLoadTime = moduleLoadTime - upTime
  else if Date.now
    module.exports = -> Date.now() - loadTime
    loadTime = Date.now()
  else
    module.exports = -> new Date().getTime() - loadTime
    loadTime = new Date().getTime()