[Issue 18627] std.complex is a lot slower than builtin complex types at number crunching

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18627

--- Comment #6 from ponce <aliloko at gmail.com> ---
Conversely complex divide seems faster with DMD with std.complex than builtins.

--