Re: [asio-users] More major implementation changes - testing help wanted

[Andrew D. <and...@gm...>]

Two thumbs up. This is fantastic.

On 7/06/2010 10:49 AM, Christopher Kohlhoff wrote:
> Hi all,
>
> First off, same drill as last time:
>
> *** These changes will definitely be included in boost 1.44.         ***
> *** They need testing in real world applications before then.        ***
> *** Please try them out and let me know of any problems asap.        ***
> *** Don't assume others will find the bugs that affect your app!  :-)***
>
> In a nutshell, these changes are the continuation of the changes started
> for asio 1.4.5 / boost 1.43. That is, more code has been moved into
> non-templates, or moved into templates that have fewer template
> parameters (where the ones they do have have commonly used instantiations).
>
> To test these changes with non-boost asio:
>
> - check out the "asio-1-4-branch" branch from asio's CVS repository; or
>
> - download a snapshot from
> http://think-async.com/asio/asio-20100607.tar.gz
>
> To test these changes with boost.asio:
>
> - check out trunk from boost SVN; or
>
> - download a snapshot from
> http://think-async.com/asio/boost_asio_20100607.tar.gz
>
> The API hasn't changed, so (most) correct programs should compile as-is.
> (For explanation of "most" see below.)
>
> The highlights of the changes include:
>
> - Programs should compile faster. This was partly achieved by including
> fewer files from other parts of boost, so you may need to add additional
> #includes to your program. E.g. your program uses boost::array but does
> not explicitly #include<boost/array.hpp>.
>
> - Large programs should compile smaller (although trivial programs may
> be marginally larger).
>
> - Multiprocessor scalability is improved on Windows. Managing timers in
> the io_service::run() threads was showing up as a performance hit (even
> when only one thread calls io_service::run). I've added a separate
> thread with the sole task of waiting for timeouts. A "waitable timer
> queue" is used for managing the timeout.
>
> - Performance of asio::streambuf with async_read() and
> async_read_until() is increased. These read operations will now use the
> existing capacity of the streambuf when reading, rather than limiting it
> to 512 bytes.
>
> - To reduce code size and speed up builds in large programs, asio now
> supports optional separate compilation. To use, add the following
> #include to a source file in your project:
>
>     #include<asio/impl/src.cpp>  // non-boost asio
>
> or
>
>     #include<boost/asio/impl/src.cpp>  // boost.asio
>
> or just add src.cpp to your project. Then build with
> (BOOST_)ASIO_SEPARATE_COMPILATION defined in your project/compiler
> settings. You may also build a separately-compiled asio as part of a
> shared library. To do this, define (BOOST_)ASIO_DYN_LINK instead.
>
> Cheers,
> Chris
>
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