Both 3.7 and 3.8 have so many performance improvements. But still, what people like most about Python is code readability. Performance isn't as important as in the past, because of how hardware performance has scaled.
So if the hope of being fast keeps you with Python, you choose the wrong language.
The number of cores have increased ridiculously, but that doesn't really help python much.
Which is something that is starting to look interesting again, given the security issues of multi-threading.