Old problem with performance

[Denis Koroskin]

On Sun, 08 Feb 2009 18:40:53 +0300, Denis Koroskin <2korden at gmail.com> wrote:

> On Sun, 08 Feb 2009 18:09:41 +0300, naryl <cy at ngs.ru> wrote:
>
>> It's a bit offtopic but I'd be grateful if someone can explain why D  
>> with structs completes this simple benchmark (see attachment) so slowly  
>> compared to C++ with classes on stack:
>>
>> D struct - 27.85s
>> C++ stack - 8.32s
>>
>> D class - 271.58s
>> C++ heap - 249.32s
>>
>> Compiled with "dmd -O". -release decreases performance by 10% in this  
>> case. -inline doesn't affects it at all.
>
> I noticed that you calculate Fib(27) in fibs.cc and Fib(40) in fibs.d
> Can this affect such a big difference between C++ and D version?
>

They both perform roughly the same when this typo is corrected.