Mailinglist Archive: opensuse-programming (84 mails)

[Colin Carter <colincarter@xxxxxxxxxx>]

I almost agree with you JDL.
C++ programmers tend to be 'function orientated' whereas FTN
programmers tend to be 'in line' orientated.  Perhaps it is
often a matter of programming style which makes the most
difference.
But one must always keep in mind two things:
these days many languages are initially, partially compiled
down to the same pseudo-language for a latter step, and
FOTRAN has been under development by very (and I mean very)
experienced people for a very long time and scientific 
programmers still turn to FORTRAN.

I started this question, but must apologise for not been very
active: mainly because my email address has changed, I still
have difficulty getting onto the internet (impossible with my
SuSE Linux machine), I still cannot link an X Window program,
and I am in the middle of moving house from England to 
Australia.  (And must visit family before I depart.)
But I have been reading, with interest, all of your comments.

I promise to try a summary ASAP.

Regards,
Colin



---- Original message ----
>Date: Mon, 30 Aug 2004 17:33:55 +0100
>From: John Lamb <J.D.Lamb@xxxxxxxxxxxxxx>  
>Subject: Re: [suse-programming-e] Is SuSE 64 bit ?  
>To: suse-programming-e@xxxxxxxx
>
>Stefan Hundhammer wrote:
>> OK, thanks, that's a very informative site.
>> 
>> But according to the charts there, there is hardly any 
difference in 
>> performance, right? Sometimes even C/C++ appears to be 
faster.
>> 
>> Or am I reading those charts wrong?
>
>No, though there may be other examples where F is actually 
faster, 
>depending on the usual things, how it's compiled, what 
number-crunching 
>is done etc. There are still F libraries such as ATLAS that 
are 
>reputedly better than the C equivalent.
>
>OTOH, since C has the asm keyword, it's always technically 
possible to 
>get C code to compile as fast as F. I've found that wring 
the number 
>crunching stuff in C/C++ carefully often gives assembly 
output that I 
>couldn't reasonably improve, albeit the style of the C/C++ 
tends to 
>resemble F a bit.
>
>In the end, there's nothing in C/C++ that says it can't 
compile to run 
>at least as fast as F, esp with the right optimisations (-
march=pentium4 
>-O3 -mfpmath=sse -msse -msse2 -malign-double works for me!), 
though I 
>think that's not always the point. Otherwise I wouldn't use 
java and 
>python. ;-)
>
>-- 
>JDL
>
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