And don't forget- its not nonstop; he's managing others during the day and setting his fingers on fire before & after work, its probably under 4 seconds per line!

Which, as long as you never under any circumstances have to actually read, build, run, or debug any of the code, is totally do-able.

Even if this physically impossible feat of coding were true, that's 150,000 lines of code to debug, written while tired. Enough to set a full engineering team back for a year.