Performance of Python should be at the same level as premature optimisation.

Author: Robadob

episodes/optimisation-introduction.md

@@ -47,7 +47,7 @@ Profiling is a valuable tool for prioritising optimisations. Should effort be ex
 
 This doesn't mean you should ignore performance when initially writing code. Choosing the right algorithms and data structures, as we will discuss in this course, is good practice. However, there's no need to obsess over micro-optimising every tiny component of your code—focus on the bigger picture.
 
-### Performance of Python
+## Performance of Python
 
 If you've read about different programming languages, you may have heard that there’s a difference between "interpreted" languages (like Python) and "compiled" languages (like C). You may have heard that Python is slow *because* it is an interpreted language.
 To understand where this comes from (and how to get around it), let's talk a little bit about how Python works.