The "test first" extreministas write a test, write code to make that test pass, make it green, then commit. Lather, rinse, repeat. So the window for loss is e

The "test first" extreministas write a test, write code to make that test pass, make it green, then commit. Lather, rinse, repeat. So the window for loss is exactly the work done for one small step of improvement. I concur that it's nicest to then squash all of those tiny steps into a single feature/bug-fix chunk.