std.experimental.logger formal review round 3

[David Nadlinger via Digitalmars-d]

On Thursday, 13 November 2014 at 19:59:21 UTC, Robert burner 
Schadek wrote:
> Therefore, I think thread local global Logger and how to make 
> them interact is something that should be left to the advanced 
> user.

Except that they can't actually get rid of all the overhead 
involved, as the locking is hard-coded into the Logger 
base-class. Granted, acquiring an uncontended lock isn't terribly 
expensive, but it's still a noticeable overhead if you are just 
logging to a thread-local buffer otherwise.

David