For some situations, understanding system calls made during processes start-up and shut-down can be valuable. For example, consider a shell-scripts long-running hot loop that runs a very short-running process. Thus it is perhaps reasonable to hypothesise that a difference in system calls during process start-up/shut-down has a non-negligable impact on the run time of said hot-loop.
This write-up looks at how C and Rust programs differ in terms of system-calls for start-up/shutdown. It is not intended as a performance analysis and only looks at one target system.
At the end, we take a quick look at using statically linked libraries by building with
# cargo build --target x86_64-unknown-linux-musl --release and removing even more syscalls by removing the