Const iterators

[Christian Chrismann]

Hi,

someone told me that STL const_iterators are faster than non-const
iterators. Is this really true? And if so, why?

I though that const_iterators should be used when possible in
order to avoid side effects (no accidental writes). But I never heard
of a speed-up.

Regards,
Chris

[Pierre Barbier de Reuille]

Re: Const iterators

Christian Chrismann wrote:

Hi,
>
someone told me that STL const_iterators are faster than non-const
iterators. Is this really true? And if so, why?
>
I though that const_iterators should be used when possible in
order to avoid side effects (no accidental writes). But I never heard
of a speed-up.
>
Regards,
Chris

for a good answer:

http://www.gotw.ca/gotw/081.htm

very nice writing :)

Pierre

[Pierre Barbier de Reuille]

Re: Const iterators

Christian Chrismann wrote:

Hi,
>
someone told me that STL const_iterators are faster than non-const
iterators. Is this really true? And if so, why?
>
I though that const_iterators should be used when possible in
order to avoid side effects (no accidental writes). But I never heard
of a speed-up.
>
Regards,
Chris

I forgot ... the short answer is "no, it is not quicker to run", the
long answer is in the article.

Pierre