pub fn process_resource_usage() -> Option<ProcessResourceUsage>Expand description
Read this process’s cumulative CPU time and RSS via getrusage(RUSAGE_SELF).
Returns None if the underlying syscall fails (never expected in
practice on a supported platform) or on a non-Unix target, where no
portable equivalent is wired up. Callers treat this as a best-effort
diagnostic read, never load-bearing.