About programing, a general question
Michael Hennebry
hennebry at web.cs.ndsu.nodak.edu
Thu Dec 23 17:36:39 UTC 2010
On Wed, 22 Dec 2010, David Liguori wrote:
> Not in terms of executable file size or speed of execution. I took a
> course in high performance scientific computing. An experiment we
> performed was to write a program for the sum of three huge arrays,
> repeated for larger and larger arrays, until it crashed, in C, C++,
> Fortran and Java. The C won quite handily at least when the C++ program
> was one that would compile equally well in C. The compiler was GCC in
> both cases, I don't know about the Fortran or Java (which is not,
> strictly speaking, a "compiled" language).
If you ran the same source compiled as C and as C++,
the results should have been pretty much the same.
There are some semantic differences,
but you won't find them by summing large arrays.
Apparently GNU's C++ front end isn't as good as its C front end.
--
Michael hennebry at web.cs.ndsu.NoDak.edu
"Pessimist: The glass is half empty.
Optimist: The glass is half full.
Engineer: The glass is twice as big as it needs to be."
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