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kotlinlang

memory wise, are companion object more efficient? will all class instances share a single companion object or is a separate one created for every instance?

all `object`s are singletons, including the `companion` kind

so if I have this inside a class constructor:
```val foobar = object {
  val x = "x"
}```
all of the instances will share the same object?

oh, so every instanc will have it's uqnie thing

if you want to declare a companion object, the syntax looks like this:

```class Foo {
  companion object {
    val x = "x"
  }
}```

all instances of `Foo` will have a reference to that same companion object