Rust is a system programming language. This means your code is compiled into native binary instructions for the processor and runs without unwanted overhead, unlike interpreters such as JavaScript or Python.

Rust also doesn't use a garbage collector and you can control all allocations of memory and the size of buffers to prevent overflow.

Another reason why Rust is so fast for microservices is that it has zero-cost abstractions, which means that most abstractions in the language weigh nothing. They turn into effective code during compilation without any runtime overhead. For network programming, this means that your code will be effective after compilation, that is, once you have added meaningful constructions in the source code.