no_coverage

The tracking issue for this feature is: #84605


The no_coverage attribute can be used to selectively disable coverage instrumentation in an annotated function. This might be useful to:

  • Avoid instrumentation overhead in a performance critical function
  • Avoid generating coverage for a function that is not meant to be executed, but still target 100% coverage for the rest of the program.

Example

#![allow(unused)] #![feature(no_coverage)] fn main() { // `foo()` will get coverage instrumentation (by default) fn foo() { // ... } #[no_coverage] fn bar() { // ... } }