optimize buffer size when multiplier <= 2
optimize buffer size when multiplier <= 2

manuel-domke/infnoise,manuel-domke/infnoise,waywardgeek/infnoise,waywardgeek/infnoise,waywardgeek/infnoise,manuel-domke/infnoise,waywardgeek/infnoise,manuel-domke/infnoise,manuel-domke/infnoise