Rust Panic Traces: From 2% Savings to 80%

A simple Rust panic — unwrap() on a None — produces a backtrace with 20-30 frames. Most are std::rt::lang_start , std::panicking::* , and core::result::* internals. Your bug is in 2-3 frames. With tokio? It gets wild. An async runtime panic can produce 60+ frames because every .await adds scheduler frames. Before: Tokio Panic Backtrace thread 'main ' panicked at 'called ` Result :: unwrap () ` on an ` Err ` value : ConnectionRefused ' , src / db .rs : 42 : 10 stack backtrace : 0 : std :: panicking :: begin_panic_handler 1 : core :: panicking :: panic_fmt 2 : core :: result :: unwrap_failed 3 : core :: result :: Result < T , E > :: unwrap 4 : myapp :: db :: connect at . / src / db .rs : 42 : 10 5 : myapp :: main ::{{ closure }} at . / src / main .rs : 15 : 5 6 : < core :: future :: from_generator :: GenFuture < T > as core :: future :: Future > :: poll 7 : tokio :: runtime :: task :: core :: Core < T , S > :: poll 8 : tokio :: runtime :: task :: harness :: Harness < T , S > :: poll 9 :