Proto for Boost mailing list page: Re: [proto] Clang compile times

Subject: Re: [proto] Clang compile times
From: Eric Niebler (eric_at_[hidden])
Date: 2013-11-21 17:19:59

On 11/20/2013 02:36 AM, Bart Janssens wrote:
> Hello,
> 
> I recently upgraded the OS and XCode on my Mac, resulting in the
> following clang version:
> Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn).
> The previous version was "Apple LLVM version 4.2 (clang-425.0.24)
> (based on LLVM 3.2svn)"
> 
> The new version is about 4 times slower when compiling proto code, but
> only uses about half as much RAM. Does anyone here know if this may be
> due to some clang setting that I can revert back? I'd like to use more
> RAM again and compile faster.

Ugh, this is terrible news. If you have a self-contained repro
(preprocessed translation unit), please file a clang bug. They'll take a
regression of this magnitude seriously.

Thanks,
Eric