In article <41166817@news.povray.org> , Wolfgang Wieser 
<wwi### [at] nospamgmxde>  wrote:

> First of all, quoting the GCC info:
> ---------------------------------------------------------------------
> Note that you will still be paying the penalty for the call through a
> function pointer; on most modern architectures, such a call defeats the
> branch prediction features of the CPU.  This is also true of normal
> virtual function calls.

That is completely outdated information and wrong on anything available in
the past decade.  It infers a completely static branch prediction.

The abstraction penalty is commonly measured with the so-called Stepanov
benchmark.  Google will probably find the source code as well as current
measures on current compilers and systems for it.

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

Visit POV-Ray on the web: http://mac.povray.org

Post a reply to this message