| ### New unique package |
| |
| The new [unique](/pkg/unique) package provides facilities for |
| canonicalizing values (like "interning" or "hash-consing"). |
| |
| Any value of comparable type may be canonicalized with the new |
| `Make[T]` function, which produces a reference to a canonical copy of |
| the value in the form of a `Handle[T]`. |
| Two `Handle[T]` are equal if and only if the values used to produce the |
| handles are equal, allowing programs to deduplicate values and reduce |
| their memory footprint. |
| Comparing two `Handle[T]` values is efficient, reducing down to a simple |
| pointer comparison. |
