Performance Tips

Python is slower than C, and that's fine. The reason most Python programs feel slow has very little to do with the interpreter and almost everything to do with the wrong data structure, an O(n^2) loop hiding inside something that looked harmless, or work happening that didn't need to happen at all. This lesson covers how to figure out where the time really goes, the small set of habits that pay off in hot code, and what to reach for when pure Python genuinely is the bottleneck.