path: root/benches/selfhosted.rs

mod util;
use criterion::{criterion_group, criterion_main, Criterion};

use crate::util::twasm_to_module;

fn run_tinywasm(twasm: &[u8]) {
    use tinywasm::*;
    let module = twasm_to_module(twasm);
    let mut store = Store::default();
    let mut imports = Imports::default();
    imports.define("env", "printi32", Extern::typed_func(|_: FuncContext<'_>, _: i32| Ok(()))).expect("define");
    let instance = ModuleInstance::instantiate(&mut store, module, Some(imports)).expect("instantiate");
    let hello = instance.exported_func::<(), ()>(&store, "hello").expect("exported_func");
    hello.call(&mut store, ()).expect("call");
}

fn run_wasmi(wasm: &[u8]) {
    use wasmi::*;
    let engine = Engine::default();
    let module = wasmi::Module::new(&engine, wasm).expect("wasmi::Module::new");
    let mut store = Store::new(&engine, ());
    let mut linker = <Linker<()>>::new(&engine);
    linker.define("env", "printi32", Func::wrap(&mut store, |_: Caller<'_, ()>, _: i32| {})).expect("define");
    let instance = linker.instantiate(&mut store, &module).expect("instantiate").start(&mut store).expect("start");
    let hello = instance.get_typed_func::<(), ()>(&mut store, "hello").expect("get_typed_func");
    hello.call(&mut store, ()).expect("call");
}

const TINYWASM: &[u8] = include_bytes!("../examples/rust/out/tinywasm.wasm");
fn criterion_benchmark(c: &mut Criterion) {
    let twasm = util::wasm_to_twasm(TINYWASM);

    let mut group = c.benchmark_group("selfhosted");
    group.bench_function("tinywasm", |b| b.iter(|| run_tinywasm(&twasm)));
    group.bench_function("wasmi", |b| b.iter(|| run_wasmi(TINYWASM)));
}

criterion_group!(
    name = benches;
    config = Criterion::default().sample_size(500).measurement_time(std::time::Duration::from_secs(5)).significance_level(0.1);
    targets = criterion_benchmark
);

criterion_main!(benches);