You’re going to be the least productive developer in any work setting from this point on. There are people checking in 50k lines of solid TDD verified, non bloat, instrument performance checked feature code per day. Your 200 lines isn’t going to cut it for very long.
That may indeed look like quite the speed-up. But the accumulated errors and entropy in such an enterprise will eventually cause a cave-in, at which point the productivity metrics don't look so good.
Well you stop when you have what you want. It doesn’t have to go the whole month. Over the last couple of months I’ve had to ride product and my business analysts hard because they can’t seem to come up with new features fast enough.