https://issues.dlang.org/show_bug.cgi?id=24052
--- Comment #3 from Grim Maple <grimmapl...@gmail.com> --- (In reply to Dennis from comment #2) > dub test is pretty quick, it takes long building example1 in release mode, > which makes me suspect dmd's backend's optimizer. Possibly issue 23857 Tested on my local machine, it is `dub build -b=release` that causes a slow compile time. Not necessarily on example1, dlangui itslef takes ages to compile too. --