Name	Size	Mode	Actions
BinaryHeap.js	3176	0644	editdlrm
Counter.js	449	0644	editdlrm
EDS.js	2975	0644	editdlrm
EWMA.js	922	0644	editdlrm
Histogram.js	4605	0644	editdlrm
Meter.js	646	0644	editdlrm
units.js	407	0644	editdlrm

var units = require('./units'); module.exports = ExponentiallyWeightedMovingAverage; function ExponentiallyWeightedMovingAverage(timePeriod, tickInterval) { this._timePeriod = timePeriod || 1 * units.MINUTE; this._tickInterval = tickInterval || ExponentiallyWeightedMovingAverage.TICK_INTERVAL; this._alpha = 1 - Math.exp(-this._tickInterval / this._timePeriod); this._count = 0; this._rate = 0; }; ExponentiallyWeightedMovingAverage.TICK_INTERVAL = 5 * units.SECONDS; ExponentiallyWeightedMovingAverage.prototype.update = function(n) { this._count += n; }; ExponentiallyWeightedMovingAverage.prototype.tick = function() { var instantRate = this._count / this._tickInterval; this._count = 0; this._rate += (this._alpha * (instantRate - this._rate)); }; ExponentiallyWeightedMovingAverage.prototype.rate = function(timeUnit) { return (this._rate || 0) * timeUnit; };