Re: [cpp-netlib-devel] FW: body copies on http::client::post

[Dean M. B. <mik...@gm...>]

On Thu, Oct 21, 2010 at 3:01 AM, Nelson, Erik - 2
<eri...@ba...> wrote:
>> Kim Gräsman wrote on Wednesday October 20, 2010 2:41 PM
>
>> Microsoft's STL as of VS2008 doesn't use COW, it uses the small-string
>> optimization. Not sure if they went (back?) to COW in 2010, but I
>> doubt it.
>>
>> LLVM has an interesting sub-project implementing a standard library
>> from scratch, and one of the decisions they mention in the overview is
>> using small string optimization over COW, as if it was a plain truth;
>> http://libcxx.llvm.org/.
>>
>> So, I think there's merit to not expecting COW from std::string.
>>
>
> STLPort (ships with Sun C++ compilers) doesn't use COW, either.
>
> http://stlport.sourceforge.net/
>
> and the links I put in a previous post
>
> http://bit.ly/hiqqU
> http://bit.ly/cqpKVN
>
> have indications in the discussions that gcc may move away from COW
> in the future.
>

Yep.

> Visual Studio 6.0 had well-known thread-safety bugs in its COW
> std::string implementation, and was the last version of MSVC to
> use COW, according to my understanding.
>
> http://support.microsoft.com/kb/813810
> http://www.eggheadcafe.com/software/aspnet/32308437/-thread-safe-stl-for-vc60.aspx
>

Ah, I stand corrected then. :)

That's good to know, I'll fix that most probably in 0.9 -- unless
someone else beats me to it and sends a pull request for 0.8-devel. :)

-- 
Dean Michael Berris
deanberris.com