Yup. To absolutely maximize performance, you need none of your code paths to swap your binary out of L1. Of course, it's not the end of the world if one of them

Yup. To absolutely maximize performance, you need none of your code paths to swap your binary out of L1. Of course, it's not the end of the world if one of them does (an occasional call to a large dynamic lib isn't too bad) but a small binary has important performance implications that most developers don't internalize.