Attribute Macro bench 

#[bench]

Register a benchmark function

Example

#[flux::bench]
fn my_benchmark(b: &mut Bencher) {
    b.iter(|| expensive_operation());
}

// With configuration
#[flux::bench(
    id = "custom_id",
    group = "parsing",
    severity = "critical",
    threshold = 5.0,
    budget = "100ms"
)]
fn critical_benchmark(b: &mut Bencher) { ... }

// Async with multi-threaded runtime
#[flux::bench(runtime = "multi_thread", worker_threads = 4)]
async fn async_benchmark(b: &mut Bencher) { ... }