From The Free On-line Dictionary of Computing (19 January 2023):
tune
<jargon> (From musical, possibly via automotive, usage) To
optimise a program or system for a particular environment,
especially by adjusting numerical parameters designed as
hooks 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.
(1999-06-05)