Best python3.x framework in 2020

That is the Performance, one of my high priority concerning.
I looked for many blogs. The one I interested was, starlette (https://www.starlette.io/). It all shows us amazing composition.
I do like async keyword on the way it does.
As my position now, I have to think much the reason to grab and curious about the algorithm of those process.
Nice to be part of open source guy, which we can select those and support the awesome guy to develop.