```ucm:hide
scratch/main> builtins.merge
```

```unison
loop : List Nat -> Nat -> List Nat
loop l = cases
  0 -> l
  n -> loop (n +: l) (drop n 1)

range : Nat -> List Nat
range = loop []
```

```ucm
scratch/main> add
```

```unison
> range 2000
```

Should be cached:

```unison
> range 2000
```