Re: Generally, are the programs written by C++ slower than written by C 10% ?

James Kanze <>
Sun, 4 Sep 2011 11:00:46 -0700 (PDT)
On Sep 4, 7:34 am, Paavo Helde <> wrote:

James Kanze <> wrote


Writing fast code in C is in principle easier as there are fewer high
level constructs which could potentially cause slowdowns.

Writing fast code in C is significantly harder, because of the
lack of encapsulation.

Only if one tries to emulate encapsulation by using means of non-zero
runtime cost, like dynamically allocated data structures accessed via
opaque pointers. If one does not attempt to have any encapsulation, then
there is nothing which would get in the way of having fast code. Of
course, ensuring that this fast code is also *correct* and *robust* and
*maintainable* is significantly harder in C, unless the project is really

The fact that the maintainability is significantly harder means
that modifying the code to improve its performance is
significantly harder. That's precisely my point.

James Kanze

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