DMD release build being faster than debug!

[Per Nordlöw]

On Friday, 5 October 2018 at 16:57:03 UTC, Seb wrote:
> Yeah BUILD more or less only defines in which folder the 
> binaries will be stored as the default BUILD was RELEASE 
> historically and the real release build can take a while and 
> shouldn't be used by default (bad newcomer experience).
> We tried to change the default BUILD to debug but it was a mess 
> with the CIs :/

Got it. Thanks, Seb.