Why does Delphi's compilation speed degrade the longer it's open, and what can I do about it?

Question

My company has been running a large project on Delphi for more than a decade. Our codebase has been growing over the years and now stands at around 4 million lines of code. Comp

Answer 1

This question have some more advice to get better compilation speed. Avoiding circular references and detect unused units (with CnWizards) are of greater effect.