Re: [boost] [any] new version

Subject: Re: [boost] [any] new version
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2011-09-04 03:19:48

On 09/03/2011 06:25 PM, Artyom Beilis wrote:
>
>        linux	windows
> boost 8.45	70.8   boost.any 1.46
> any1  8.45	31.4   virtual impl->type() == typeid(Cast)
> any2  3.9	17.1   *this->type_ == typeid(Cast)
> any3  10.15	35.2   strcmp(this->type_->name(),typeid(Cast).name()) == 0
> any4  4.5	12.5   this->type_ ==&typeid(Cast) || *this->type_ == typeid(Cast)
>
>
> The first any implements the Boost.Any method - virtual call to get type
> compare to casted type and then cast.

What if we keep the pointer to the type_info in impl, but make it 
directly accessible, not via a virtual call? This would keep sizeof(any) 
to one pointer and only add one indirection to any4. IMHO, that would be 
the best solution.