On Sat, 26 Mar 2016 06:16:09 -0700, Charles Mills wrote: >> 200 percent improvement > >If a job formerly took five minutes, then I guess a 100% improvement in >performance would get it to zero minutes. Does a 200% improvement mean it >finishes five minutes before it starts? > Be careful! Does, e.g., a 75% improvement mean doing 175% of the work with the same resource or the same work with 25% of the resource?
Americans measure fuel economy in miles/gallon, most Europeans in liters/100km which makes more sense when you average fuel economy over a fleet. Some modern cars display (almost) instantaneous fuel economy in MPG. When a hybid charges its battery descending a pass, does it display negative MPG? Again, negative liters/100km makes more sense; it means you're recovering back some of the energy you spent ascending. I shudder to imagine regenerative braking descending a grade in reverse. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
