LayoutTests/workers/wasm-resources/long-compile.js

let count = 0;
function done() {
    if (++count === 2) {
        console.log("Finished test");
        if (window.testRunner)
            testRunner.notifyDone();
    }
}

let worker = new Worker("./wasm-resources/long-compile-worker.js");
worker.onmessage = function(e) {
    if (e.data === "done") {
        done();
        return;
    }

    if (!(e.data instanceof WebAssembly.Module)) {
        throw new Error("Bad post message");
    }

    async function run(module) {
        let start = Date.now();
        let instance = await WebAssembly.instantiate(module);
        const count = 7000;
        if (instance.exports.f1(4) !== (4*count + 4*2))
            console.log("Bad result");
        else
            console.log("Good result");
        done();
    }
    run(e.data);
}