| Type / Feature | Memory | Semantics | Mutability | Equality |
|---|---|---|---|---|
| Class | heap | reference | mutable | reference |
| Record | heap | reference | immutable | value |
| Struct | stack | value | mutable | value (inefficient) |
| Type / Feature | Memory | Semantics | Mutability | Equality |
|---|---|---|---|---|
| Class | heap | reference | mutable | reference |
| Record | heap | reference | immutable | value |
| Struct | stack | value | mutable | value (inefficient) |