Simple performance question from a newcomer

[bachmeier via Digitalmars-d-learn]

On Tuesday, 23 February 2016 at 11:10:40 UTC, ixid wrote:
> On Monday, 22 February 2016 at 15:43:23 UTC, dextorious wrote:
>> I do have to wonder, however, about the default settings of 
>> dub in this case. Having gone through its documentation, I 
>> might still not have guessed to try the compiler options you 
>> provided, thereby losing out on a 2-3x performance 
>> improvement. What build options did you use in your dub.json 
>> that it managed to translate to the correct compiler switches?
>
> Your experience is exactly what the D community needs to get 
> right. You've come in as an interested user with patience and 
> initially D has offered slightly disappointing performance for 
> both technical reasons and because of the different compilers.

His concern is with the default settings of Dub. I've tried Dub 
and given up several times, and I've been using D since 2013. The 
community needs to provide real documentation. It's embarrassing 
that it's pushed as the official package manager and will soon be 
included with DMD.