Re: compilation time [was Re: Magnavox consultant]

[cosby@greatwall.cctt.com (John Cosby)]

tmoran@bix.com wrote:
>> A 2200-line program is not likely to have many with clauses per
>> compilation unit.  ... cannot be assumed that this test scales up
>> to a large program with complex dependencies among compilation units.
>That raises the interesting question of how the number of with's
>scales with total program size in the real world.  Presumably in a
>good modular design it's much less than linear, but how much?  There
>are rules of thumb about 'a single module shouldn't be more than
>N lines' - should a single module not have more than M with's?

I'll have to vote against making that a hard and fast rule.  I've been writing 
X/Motif user interface code using Ada bindings for a couple of years, and I 
find the folks who generated the bindings subdivided their packages pretty
well.  Unfortunately, to get anything done with a complex window, I have
to with several packages; in one callback package, I have 7 with's for X,
X_Lib, and Xm packages, before I begin withing application packages to
call for services.  If there were a programmatic guideline that I could
only have M with's per N lines, I'd have had to apply for a waiver, unless
the M was set so high as to not really matter.

--- 
John Cosby - cosby@greatwall.cctt.com - cosbyj@nefarious.saic.com
  I've been porting bits of Ada back to C lately... my brain thinks it got 
  thrown into reverse....