{"ast_node_type":"import","tokens":[{"end":89,"kind":"keyword","start":0,"text":"///"}]}
    /// has shown measurable performance improvements on stress tests. We then reuse this
    /// `&[u8]`. Not having to indirect those through an `AllocId` (or two, if we used `Indirect`)
    /// optimization for slice-tail types more generally during valtree-to-constval conversion.