Testing some singleton implementations

[Jonathan Bettencourt]

On Friday, 7 February 2014 at 20:09:29 UTC, Stanislav Blinov 
wrote:
> There's a lot more to these singletons than meets the eye.
>
> - It would seem that such usage of raw MemoryOrder in 
> AtomicSingleton would be wrong (e.g. return to acq/rel is in 
> order, which should not pose any performance issues on X86, as 
> Sean mentioned).

I agree that acq/rel is the correct way to go, but it will cause 
performance issues with the current implementation of AtomicLoad.