@WhyNotZoidberg @researchfairy Efficiency is a ratio. It is a fraction, with a numerator and a denominator. To measure efficiency, you must measure and also specify the units for both of those. What divided by what? What per what? Without quantifying or at least naming the units, "efficiency" is just jerking off.
@bamfic @researchfairy 95% it means "cheaper" (aka costs less tax Euros)