Re: Apple IIGS ROM 1 or ROM 3, which is better?

[pausch@saaf.se (Paul Schlyter)]

In article <OYSdnXwEJbZQuQjbnZ2dnUVZ_v6tnZ2d@comcast.com>,
Michael J. Mahon <mjmahon@aol.com> wrote:

> mdj wrote:
>> On Jul 2, 11:23 am, "Michael J. Mahon" <mjma...@aol.com> wrote:
>> 
>> 
>>>With object orientation comes a surplus of indirection.  ;-)
>> 
>> 
>> At least you stopped short of saying that's a bad thing ;-)
> 
>  From the point of view of speed, *avoidable* indirection is a
> *very* bad thing.  Memory latency is hundreds of processor
> cycles, at least.
> 
> With good data organization, reasonable cache design, and a
> compiler that can prefetch object instances before use, much
> of the *simple* indirection cost can be amortized, but compiler
> designers tend to be relatively ignorant of what machines must
> actually *do* to execute their code.  ;-(
> 
> -michael

Actually, that's good news, not bad news - it means it's still worthwhile
to program in assembly language!!!!!   ;-)

-- 
----------------------------------------------------------------
Paul Schlyter,  Grev Turegatan 40,  SE-114 38 Stockholm,  SWEDEN
e-mail:  pausch at stockholm dot bostream dot se
WWW:     http://stjarnhimlen.se/