mutou-micro/test.js

Get the current time in microseconds

var microtime = require('./index')

console.log('microtime.now() =', microtime.now())
console.log('microtime.nowDouble() =', microtime.nowDouble())
console.log('microtime.nowStruct() =', microtime.nowStruct())

console.log('\nGuessing clock resolution...')

var start = microtime.now()
var minDiff = Infinity
var minCycles = 10000
var maxCycles = 100000
var cycles = maxCycles

for (var i = 0; i < cycles; ++i) {
  var a = microtime.now()
  var b = microtime.now()
  var diff = (b - a) || (b - start)

  if (diff > 0 && diff < minDiff) {
    minDiff = diff
    cycles = minCycles
  }
}

if (minDiff === Infinity) {
  console.log('Unable to guess clock resolution')
} else {
  console.log('Clock resolution observed: ' + minDiff + 'us')
}