Disappointing math performance compared to GDC

[Gabor Mezo via digitalmars-d-ldc]

On Friday, 10 October 2014 at 12:13:49 UTC, John Colvin wrote:
> On Thursday, 9 October 2014 at 08:13:21 UTC, Gabor Mezo wrote:
>> Hey,
>>
>> We have made progress. I've merged my computation code into a 
>> single module, and now the LDC build is as perfomant as the 
>> Clang one! The benchmark took around 0.044 secs. It's slower 
>> that the GDC version but it is amazing that D language can be 
>> as performant as C++ by using the same compiler backend, so no 
>> magic allowed.
>>
>> Results pushed in.
>
> The -singleobj flag may give you that same performance boost 
> without having to refactor the code.

How do you do this by using dub?