Code paging. If your hot code spans multiple pages, you run the risk of the CPU needing to perform page fetching to continue executing your code. If your except

Code paging. If your hot code spans multiple pages, you run the risk of the CPU needing to perform page fetching to continue executing your code. If your exception handling code causes the hot path to exceed the page size, then you run the risk of cache misses which can cripple performance. Rust has the #[cold] attribute for this exact reason - to mark functions or branches as 'cold', placing them into a separate section to reduce the hot path's code size.