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var units = require('./units')
var EWMA = require('./EWMA')
function Meter(opts) {
var self = this
this._tickInterval = units.SECONDS
this._samples = opts.seconds || 1
this._timeframe = opts.timeframe || 60
this._rate = new EWMA(units.SECONDS, this._tickInterval)
this._interval = setInterval(function() {
self._rate.tick()
}, this._tickInterval)
this._interval.unref()
}
Meter.RATE_UNIT = units.SECONDS
Meter.prototype.mark = function(n) {
n = n || 1
this._rate.update(n)
}
Meter.prototype.val = function() {
return Math.round(this._rate.rate(Meter.RATE_UNIT) * 100 ) / 100
}
module.exports = Meter