main.rs

use wasmtime::{Module, Store};

fn main() {
    let _ = env_logger::try_init();

    for i in 0.. {
        if i % 1000 == 0 {
            println!("{i}");
        }

        let mut config = wasmtime::Config::new();
        config.parallel_compilation(false);
        unsafe {
            config.cranelift_flag_set("wasmtime_linkopt_padding_between_functions", "53199");
        }
        let engine = wasmtime::Engine::new(&config).unwrap();
        let store = Store::new(&engine, ());

        std::thread::scope(|s| {
            let t1 = s.spawn({
                let store = Store::new(store.engine(), store.data().clone());
                move || {
                    Module::new(store.engine(), r#"(module (func (export "run")))"#).unwrap();
                }
            });
            let t2 = s.spawn({
                let mut store = Store::new(store.engine(), store.data().clone());
                move || {
                    let module =
                        Module::new(store.engine(), r#"(module (func (export "run")))"#).unwrap();
                    let instance = wasmtime::Instance::new(&mut store, &module, &[]).unwrap();
                    let func = instance.get_func(&mut store, "run").unwrap();
                    func.call(&mut store, &[], &mut []).unwrap();
                }
            });

            t1.join().unwrap();
            t2.join().unwrap();
        });
    }
}