mitmproxy is great for web dev because you can map any url to any other url transparently. for instance you can test prod front end on your localhost dev backend and vice versa.
I love mitmproxy. I used it to cache all my downloads in CI for performance and stability.
So..... Don't certificate pin (:
So, from the screenshot on the blog post; it's exactly as fast as HTTP/1.1?
I love mitmproxy. It's been consistently part of my toolbelt for nearly a decade, it's stable, and still has plenty of new features that I can use if I need them, but it still works the same for its core use case as it did ten years ago.