Macro with_monitoring 

macro_rules! with_monitoring {
    ($closure:expr) => { ... };
}

Conditionally execute monitoring code only when monitoring is enabled.

This macro helps avoid the overhead of monitoring operations when monitoring is disabled at runtime.

Example

use kryst::utils::profiling::with_monitoring;

with_monitoring!(|| {
    eprintln!("Iteration {}: residual = {:.2e}", iter, residual);
});