Don't think @memorize fit any case.

I saw you use first argument as key of cache.
What if the first argument is an object, like this:

```js
const a = {};
const b = {c: {}}
String(a) //"[object Object]"
String(b) //"[object Object]"
```
Besides, can you provide any benchmark tests?
I don't think it fit any case.

Start at the @memorize decorator and reproduce the object-key examples from the issue. Check the existing test setup, then add benchmark coverage for those cases; done means the collision behavior and performance trade-off are addressed or clearly documented.

Scritto dal modello di indicizzazione a partire dal testo della issue.