Re: Question: Combination of Access and Constraining

[Jeffrey Carter <jrcarter@acm.org>]

Simon Wright wrote:
> 
> Many programmes have some time-critical areas. But it's not common (in
> my experience) for something like parameter passing style to have much
> impact, unless it's completely bizarre (passing 1MB arreays by copy
> would count as bizarre!) More often it's very localized, and better
> algorithms will make much more difference.

Regardless of the timing requirements for the software, doing strange 
things in the software to try to "optimize" some aspect of it, before 
you know that doing it normally is really impacting the timing, is 
simply wasting resources.

If your compiler makes suboptimal parameter passing decisions and those 
are significant enough to impact the timing, you need to improve your 
compiler selection process, not screw up the code.

-- 
Jeff Carter
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