Stress testing best practices? about pebble HOT 5 OPEN

// IteratorRange represents a range of numbers to chunk slices into.
type IteratorRange struct{ From, To uint64 }

// GenerateRanges generates a list of ranges from min to max with a batch size.
func GenerateRanges(min, max uint64, batchSize uint64) []IteratorRange {
	if batchSize == 0 {
		batchSize = 1
	}

	var ranges []IteratorRange
	// this has to be from <= max to include the last batch
	for from := min; from <= max; from += batchSize {
		// without -1 the first batch will be 10-20 and the second batch will be 20-30
		// with -1 the first batch will be 10-19 and the second batch will be 20-29
		to := (from + batchSize) - 1
		if to > max {
			to = max
		}
		ranges = append(ranges, IteratorRange{from, to})
	}

	return ranges
}