Re: Ada in a C++ Interview

[theory.TC.Cornell.EDU!lijewski@tcgould.tn.cornell.edu (Mike Lijewski)]

In article <1991Aug06.220725.4010@netcom.COM> jls@netcom.COM (Jim Showalter) wr
ites:
>yow@sweetpea.jsc.nasa.gov (Bill Yow) writes:
>
>>it turns out that the only people that are doing Ada 
>>programming of Crays happpen to be oil companies.
>
>Well, this is hardly something to be ashamed of (assuming this
>is true)--commercial organizations using Ada by _choice_ are
>even better than DoD folks using Ada. This is especially nice
>*reuse. Quality/productivity. Risk reduction. EFFECTIVE OO usage. Ada/C++.    
*
Vectorizing and tasking are orthogonal.  I've vectorized and parallelized
plenty of code.  The first rule is always to make the code as highly
vectorized as possible.  Only then do you worry about parallelizing the
code.  The rationale being that parallelization always introduces overhead
of its own, so you want the code to run as fast as possible before taking
that step.  My experience is that well vectorized code is both more
efficient and maintainable, even on scalar machines.  So the question is,
are there any Ada compilers which produce highly vectorized code, on say
Crays, IBM 3090s or any of the other vector machines?

-- 
Mike Lijewski  (H)607/272-0238 (W)607/254-8686
Cornell National Supercomputer Facility
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