Re: Ada vs. C++

[Gautier <gautier.demontmollin@maths.unine.ch>]

>   Has anyone done any measurements on the different speeds and
> memory requirements of comparable applications written in C++
> and Ada95.  I am learning both languages.

For simple performance comparisons (fixed allocations) it would
be interesting - and rather comparing with Fortran compilers, THE
reference...

For programs using many temporary objects Ada offers possibilities
that C/C++/Fortran may not offer. I think to multi-precision
integer calculations that can be done without any dynamic allocation
(no 'new', 'free', nor memory fragmentation problems that arise quickly
in that context), because of ability of returning and manipulating
non-trivial objects (unconstrained arrays).

Beware of not comparing a bad C++ compiler with a good Ada one (or
reversely) and conclude something about the languages...
You have to precise how differently the programs can be coded in
both languages. If you program in Ada just like C you might
overuse allocations. Reversely, if you program the same algos
using Ada's nested procedures, local objects, subtyping etc.
it could bring good surpises...

-- 
Gautier

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