2007/9/21, Dave Korn <dave.korn@xxxxxxxxxx>: > On 20 September 2007 20:44, Bruno Moreira Guedes wrote: > > > Bu I've been made some tests... By example... A macro: > > > > #define mul(X,Y) (X*Y) > > > > > > It makes the processing faster... > > Your test methodology is broken. > > > But... Why executing that a milion of times is faster than using the > > simple a*b itself??? > > It isn't. > > > It really happens? > > It doesn't. > > > Why? > > Because you did one timing run when your system was under very heavy load of > background tasks and the other when it was under very light load, most likely. > So, my old concept(it's just replace the source text) is right?? Then, the ones who frequently insists that using macros makes part of the processing at compile-time is really wrong? Going out of the original question, does someone recommend me a good doc about how to optimize my programs, making it run fast. > > cheers, > DaveK > -- > Can't think of a witty .sigline today.... > >
