LLVM and TLS

[Dan Olson via digitalmars-d-ldc]

"Jonathan Marler" <johnnymarler at gmail.com> writes:

> I've noticed that on my windows 7 development machine, switching
> between TLS and non-TLS storage has a minimal impact on performance
> (when using DMD).  I haven't tried LDC yet, however, on a macbook pro,
> which uses clang (LLVM) for the linker, using TLS has a huge
> performance impact (much much slower).  Does anyone know if this is
> because of the way LLVM handles TLS storage?  I'll have to try using
> LDC on my windows machine but maybe one of you know off hand whether
> or not LLVM has some performance problems with TLS storage. Thanks!

Last time I checked, DMD still did not use OS X native TLS support, but
has its own solution.  Try LDC and see if the performance improves
because LDC uses OS X native TLS.
--
Dan