I would not be surprised that Rust be faster than Python, but looking at the code of his Benchmarks, I'm not sure that it really means anything.

For example, the "light" test will do calls to "dynamodb". Maybe you benchmark python, or you benchmark the aws sdk implementation with different versions of python, or just you benchmark average dynamodb latencies at different times of the day, ...

And, at least for Python, his cpu and memory test code looks like to be especially specific. For example, if you use "sha256" or any other hashlib, you will not really benchmark python but the C implementation of the hashlib, that might depend on the crypto or gcc libraries or optimization that was used by AWS to build the python binaries.