Re: [boost] [config] Using SD-6 macros

Subject: Re: [boost] [config] Using SD-6 macros
From: John Maddock (jz.maddock_at_[hidden])
Date: 2015-06-13 13:02:16

>> Yes, that would be the objection from my side, at least. I don't want to
>> include a whole std header to check for a single feature that may be
>> implemented in it. And I want Boost.Config to include most of STL even
>> less.
>
> And the rationale for this is what ? Compile-time computer cycles ?
>

The effect is measurable, at least on cygwin GCC-4.9.2, I see:

Current Config

Size: 21K, times:

real    0m0.279s
user    0m0.030s
sys     0m0.233s

Config plus headers required for current SD6:

Size 2Mb, times:

real    0m1.092s
user    0m0.593s
sys     0m0.467s

I would expect the effect to get worse as more SD6 macros are added to 
other headers.

John.