TLDR; I compiled 1 billion lines of C++ with Dev-C++ in 15 minutes on a Threadripper 3990X with 64 cores. The latest version of Dev-C++ supports parallel compilation which made this possible. https://blogs.embarcadero.com/threadripper-3990x-the-quest-to-compile-1-billion-lines-of-c-on-64-cores/
The original author of this fork seems incommunicado. A new fork has been created of this project and upgraded to compile in the latest version of Delphi which supports, Unicode, high-DPI, and Windows 10. https://sourceforge.net/projects/embarcadero-devcpp/