Re: Will C++ compilers ever be better than C compilers?

> To summarize:
> C++ compilers will produce code with lower performance than
> C compilers on equivalent code, ...


> Do you agree?


No.


> Can you provide concrete examples?


Yes.


Our (Concurrent Computer Corporation's) C++ compiler uses the same
back end code generator as our C (and FORTRAN and ADA) compiler. Thus
C++ got the benefit of all the performance tuning and optimization
algorithms that went into C. Further, in order to have a decent
chance of generating good code for the features unique to C++, we had
to invest considerable resources into doing even more analysis for
optimization in the C++ compiler. As a result, the C++ compiler
generating code for C source, generates better code than the older C
compiler (which hasn't yet incorporated the newer analysis).


I expect the same to be true for anyone who shares optimization and
code generation code across multiple compilers (which I suspect is
just about all major vendors these days).
--
http://www.jeff-jackson.com
--

Return to the comp.compilers page.
Search the comp.compilers archives again.