Re: [boost] Should Boost adopt pimpl/d-pointer as much as it can?

Subject: Re: [boost] Should Boost adopt pimpl/d-pointer as much as it can?
From: Artyom (artyomtnk_at_[hidden])
Date: 2010-03-23 17:16:44

> From: Alexander Churanov <alexanderchuranov_at_[hidden]>
> Subject: Re: [boost] Should Boost adopt pimpl/d-pointer as much as it can?
> To: boost_at_[hidden]
> Date: Tuesday, March 23, 2010, 9:00 PM
> Artyom,
> 
> Did you try precompiling header files?
> 
> My results are:
> 
> inclusion 2,6 s (-02+link)
> precompilation 1,45 s (-02+link)
> diff *1.8*
> 
> gcc 4.2, boost 1.41
> 
> Alexander Churanov

There is one big issue with precompiled headers -- you only have one
such header. So it is all or nothing, This is problematic, I tinkered
a lot with PCH and various configurations. So far the best:

- Use forward declarations
- Include only that you need

Gives much better performance then

- Include everything in PCH
- Include PCH everywhere.

Artyom