Is it normal for this JavaScript code to run slowly?

[jwwsjlm]

function f980101(w980, w981, w983) {
    var sum = w983;
    var j = 0;
    var mm = 0;
    for (var i = w980; i <= w981; i++) {
        j++;
        mm = j * j;
        sum += i * 42;
    }
    return sum;
};

function caleResult() {
    return f980101(0, 580176, 980)
}

Goja Implementation

func JsRun() (string, error) {
    jsstr := `function f980101(w980,w981,w983){var sum=w983; var j=0; var mm = 0;for(var i=w980; i<=w981;i++){j++; mm = j*j;sum += i*42;} return sum;};function caleResult(){return f980101(0,580176,980)}`
    Vm := goja.New()
    if _, err := Vm.RunString(jsstr); err != nil {
        return "", err
    }
    cale, ok := goja.AssertFunction(Vm.Get("caleResult"))
    if !ok {
        return "", errors.New("json,error")
    }
    res, err := cale(goja.Undefined())
    if err != nil {
        return "", errors.New("jsvm,error")
    }

    return res.String(), nil
}

Run on my computer. Single time is about 200 milliseconds? Is it too slow?Or is there something wrong with my wording? I7 8700K

[dop251]

In short, yes. The compiler does very few optimisations (for example, it cannot work out that you don't need j or mm) and the virtual machine does not compile anything to native code, so it mostly runs at interpreter speeds. Even if you leave the loop body empty it will probably still take around 100 ms.

Also, see https://github.com/dop251/goja?tab=readme-ov-file#why-would-i-want-to-use-it-over-a-v8-wrapper