The D IDE Coedit is not a RAD tool like Lazarus. It does nothing with reflection, like Lazarus does, typically object streaming based on what's done by the user

The D IDE Coedit is not a RAD tool like Lazarus. It does nothing with reflection, like Lazarus does, typically object streaming based on what's done by the user in the visual designer, written to a file, that get linked in the final application and reloaded at run-time with object de-streaming. In comparison, Lazarus + LCL + packages is 1.59M SLOC while Coedit barely reaches 30K SLOC. Coedit is really a simple program, it's just an editor dedicated to D, with facilities to compile projects (DUB, DMD-based custom format) and also to run D modules from scratch, it's just a GUI with a lot of piped sub-processes under the hood ^^