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rust@octodon.social ("Rust tips") wrote:

#Rustlang has a #[cold] optimization hint for rarely-called functions, and #[inline(never)] that disables inlining.

Use these two on expensive error handling functions to speed up compilation, reduce code size, and improve effectiveness of instruction cache.

#[cold]#[inline(never)]fn handle_error(err: &dyn Error) -> ! {    …}impl MyError {    #[cold]    #[inline(never)]    pub fn new() -> Self {        …    }}