Slow performance compared to C++, ideas?

[Timon Gehr]

On 05/31/2013 12:58 PM, Joseph Rushton Wakeling wrote:
> On 05/31/2013 08:34 AM, Manu wrote:
>> What's taking the most time?
>> The lighting loop is so template-tastic, I can't get a feel for how fast that
>> loop would be.
>
> Hah, I found this out the hard way recently -- have been doing some experimental
> reworking of code where some key inner functions were templatized, and it had a
> nasty effect on performance.  I'm guessing it made it impossible for the
> compilers to inline these functions :-(
>

That wouldn't make any sense though, since after template expansion 
there is no difference between the generated version and a particular 
handwritten version.