Is it really going to be faster? In the benchmark they cited in the README [0], they are in 10th place among Python frameworks. This is not a real-life benchmark, as it merely expects a hardcoded response. In fact, Robyn’s 10th place is thanks to a feature designed for benchmarks like this, i.e. marking responses as constant [1]. Three more frameworks beat Robyn if you disable this benchmark optimization.
Can't speak for Robyn since that is competing in an already aggressively competitive landscape (webserving). Whereas introduction of RUFF/UV by astral has been exceptional.