I wrote a simple commandline program in Rust to read mailbox file from Thunderbird and to output count of unread mails. The speed is insanity! Measuring the execution time with command time CMD outputs execution time of total 0m0,001s! While also providing all the features and checks from Rust (plus Clippy with pedantic options enabled), so I am confident it is not a buggy mess. I would need at least 10 years of professional experience in C to have this feeling of confidence.