Function NewHistogram

benchmark/stats/histogram.go:79–103

NewHistogram returns a pointer to a new Histogram object that was created with the provided options.

(opts HistogramOptions)

// NewHistogram returns a pointer to a new Histogram object that was created
// with the provided options.
func NewHistogram(opts HistogramOptions) *Histogram {
	if opts.NumBuckets == 0 {
		opts.NumBuckets = 32
	}
	if opts.BaseBucketSize == 0.0 {
		opts.BaseBucketSize = 1.0
	}
	h := Histogram{
		Buckets: make([]HistogramBucket, opts.NumBuckets),
		Min:     math.MaxInt64,
		Max:     math.MinInt64,

		opts:                          opts,
		logBaseBucketSize:             math.Log(opts.BaseBucketSize),
		oneOverLogOnePlusGrowthFactor: 1 / math.Log(1+opts.GrowthFactor),
	}
	m := 1.0 + opts.GrowthFactor
	delta := opts.BaseBucketSize
	h.Buckets[0].LowBound = float64(opts.MinValue)
	for i := 1; i < opts.NumBuckets; i++ {
		h.Buckets[i].LowBound = float64(opts.MinValue) + delta
		delta = delta * m
	}
	return &h
}

// Print writes textual output of the histogram values.
func (h *Histogram) Print(w io.Writer) {