Re: [boost] If boost::fusion is the hammer, then what's the nail?

From: David Abrahams (dave_at_[hidden])
Date: 2006-12-15 08:26:18

"Gennadiy Rozental" <gennadiy.rozental_at_[hidden]> writes:

> "David Abrahams" <dave_at_[hidden]> wrote in message 
> news:87lkl93hlx.fsf_at_pereiro.luannocracy.com...
>> "Gennadiy Rozental" <gennadiy.rozental_at_[hidden]> writes:
>>
>>> This is not clear cut. I do not see in theory why any boost::variant 
>>> based
>>> algorithm couldn't be optimized to almost the same code (module type
>>> switching). On the other hand excessive usage of tuples will cause
>>> appropriate code bloat, eventually leading to code slow down.
>>
>> Not clear cut at all.  When operating on a sequence where all the
>> types are different, the version with variant will be both slower and
>> larger.
>
> I love these performance "estimations"
>
> Do you have any numbers to sustain this?

No, sorry.  It's simply obvious.

Feel free to prove me wrong if it isn't obvious to you.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com