Function eager_thread_instantiate

benches/thread_eager_init.rs:75–85

This benchmark spawns a new thread, and records the duration to eagerly initializes the thread local resources. It then creates a store and instance, and records the duration it took to execute the first function call.

(engine: Engine, module: Module)

/// instance, and records the duration it took to execute the first function
/// call.
fn eager_thread_instantiate(engine: Engine, module: Module) -> (Duration, Duration) {
    thread::spawn(move || {
        let init_start = Instant::now();
        Engine::tls_eager_initialize();
        let init_duration = init_start.elapsed();

        (init_duration, duration_of_call(&engine, &module))
    })
    .join()
    .expect("thread joins")
}

fn test_setup() -> (Engine, Module) {
    // We only expect to create one Instance at a time, with a single memory.