Function run_scenario 

pub fn run_scenario(
    driver: &mut FrameHarness,
    scenario: &PerfScenario,
) -> PerfReport

The driver runs the app’s real five passes with no GPU or display, so timings are of the production code path, not a mock.

Panics

Panics if a named click target cannot be resolved or has an empty rectangle. A failed workload must not return a successful timing report.