the information in this article are just incorrect.
1. Rust if the fastest language ( except c and c++ ).
2. Go ram usage is so small, that you can run an entire fleet microservice on the same footprint where JAVA can run just 1 micro service.
you can try this yourself, create a todo app in JAVA Sprint, and 1 in go, then create a container and see the difference.
even nodejs is better than java at ram&CPU usage. ( in some scenarios )
why are you writing false information?
what are you, a Trump supporter?