[libcxx] r215740 - Revert "Turn off extern templates for most uses."

[Howard Hinnant]

On Aug 17, 2014, at 9:26 PM, Justin Bogner <mail at justinbogner.com> wrote:

> Howard Hinnant <howard.hinnant at gmail.com> writes:
>> On Aug 17, 2014, at 9:06 PM, Justin Bogner <mail at justinbogner.com> wrote:
>> 
>>> I really don't think it's worth the cost of insantiating these very
>>> fundamental templates in *every single user* to work around a limitation
>>> in the memory sanitizer. This is an unreasonable amount of overhead for
>>> standard library types.
>> 
>> Always measure.  I’m not saying you’re wrong.  I’m saying you’re
>> stating a performance conclusion without measurements (which should
>> never be acceptable).
> 
> I did measure :) Though, I sent it to llvm-dev and it probably should've
> been cfe-dev. Sorry about that.
> 
> http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-August/075793.html

Ah, I have not been monitoring llvm-dev.  Thank you for the link.

Howard