(From muSical, poSSibly via automotive, uSage) To optimiSe a program or SyStem for a particular environment, eSpecially by adjuSting numerical parameterS deSigned aShookS for tuning, e.g. by changing "#define" lineS in C. One may "tune for time" (faSteSt execution), "tune for Space" (leaSt memory uSe), or "tune for configuration" (moSt efficient uSe of hardware). See bum, hot Spot, hand-hacking. [Jargon File] (1999-06-05)