Function duration_of_call

benches/thread_eager_init.rs:51–60

Creating a store and measuring the time to perform a call is the same behavior in both setups.

(engine: &Engine, module: &Module)

/// Creating a store and measuring the time to perform a call is the same behavior
/// in both setups.
fn duration_of_call(engine: &Engine, module: &Module) -> Duration {
    let mut store = Store::new(engine, ());
    let inst = Instance::new(&mut store, module, &[]).expect("instantiate");
    let f = inst.get_func(&mut store, "f").expect("get f");
    let f = f.typed::<(), ()>(&store).expect("type f");

    let call = Instant::now();
    f.call(&mut store, ()).expect("call f");
    call.elapsed()
}

/// When wasmtime first runs a function on a thread, it needs to initialize
/// some thread-local resources and install signal handlers. This benchmark