boostorg/build — pull request #6 by jivancic (2014-01-14 16:04:24+00:00)
Title: Avoid slow MSVC setup scripts. Closes ticket #234.

Since MSVC 10.0 compiler setup scripts became very slow. Avoid calling them on every build action by caching their environment changes.

Discussion: http://lists.boost.org/boost-build/2013/09/27000.php
Ticket: https://trac.lvk.cs.msu.su/boost.build/ticket/234