core::hint - Rust
Description: Hints to compiler that affects how code should be emitted or optimized. Hints may be compile time or runtime.
Keywords: rust, rustlang, rust-lang, hint

# Module core::hint
1.27.0[−][src]

Expand description

Hints to compiler that affects how code should be emitted or optimized. Hints may be compile time or runtime.

## Functions

black_box Experimental

An identity function that hints to the compiler to be maximally pessimistic about what `black_box` could do.

spin_loop

Emits a machine instruction to signal the processor that it is running in a busy-wait spin-loop (“spin lock”).

unreachable_unchecked⚠

Informs the compiler that this point in the code is not reachable, enabling further optimizations.