Go is the only one of the three that directly uses syscalls. Rust and Swift both go through libc. Swift never even had the option of directly using syscalls, si

Go is the only one of the three that directly uses syscalls. Rust and Swift both go through libc. Swift never even had the option of directly using syscalls, since it was originally designed for MacOS, and syscalls are so unstable there that they've changed in minor version updates.