TIL - std::hint::blackbox()

Posted on 2026-03-27 While watching this talk on mutexes , early in the talk, the presenter shows a slide with a tiny bit of rust code where I learnt about std::hint::blackbox function. The function is essentially an identity function. The documentation gives some very clear explanation and an example. It is very useful to prevent a value from being optimized away by the compiler. The…