[LLVMdev] [cfe-dev] [RFC] Raising LLVM minimum required MSVC version to 2013 for trunk

[Aaron Ballman]

On Wed, Oct 8, 2014 at 12:17 PM, Greg Bedwell <gregbedwell at gmail.com> wrote:
> Hi,
>
> To follow up from Paul last week:
>
>> I'm expecting to have our internal builds switched over later this
>> week.  Our investigations have shown no problems.
>
> We've now updated our internal builds from 2012.4 (cl.exe 17.0.61030) to
> 2013.3 (cl.exe 18.00.30723).  Our automated testing over the weekend hasn't
> shown any correctness issues so we plan to continue using it now..
>
> From some of the stats I've collected it seems to be a worthwhile update.
> On my own machine, the time for a full rebuild from clean of ALL_BUILD (LLVM
> & Clang, Release + asserts + debug info, not using ninja) has improved by
> 20%.  Doing a like-for-like build of various benchmarks and games using
> clang built by VS2012 and VS2013, the clang build speed of a typical -O2 -g
> build is somewhere between in the noise and 1% faster with VS2013.  We've
> not yet observed any regressions in the speed of clang since upgrading.

Great, thank you for the feedback!

~Aaron