Performance Question

[Pell, Blake B]

This is something I've been curious about but never really been able to find an 
answer for.  Would it be better to have extremely large files (like act_wiz.c, 
fight.c pushing 15,000+ lines) or split the code up into smaller files (for 
instance pulling reclass specific code into their own .c files)?  My question 
is, does this even matter?
 
Rhien.