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.