"TDD feels slow"
Answer:
Making incremental progress towards a goal is not wasting time; it's how you save time. It's how you go fast!.
Of course that's true! Taking small steps is always faster than taking giant leaps.
The people who take that lesson to heart will have a tremendous advantage.
– Uncle Bob, "Test Design", https://learning.oreilly.com/videos/clean-code-fundamentals/9780134661742/9780134661742-code_02_22_00/