What a compiled decode step hands a cache to assemble its closure inputs. The
arrays it returns live for one step; the runner releases them afterwards.
Registers array, which the cache computed for this step's inputs (a
prefix it decodes outside the recorded graph), for release after the step;
returns it. Takes ownership.
What a compiled decode step hands a cache to assemble its closure inputs. The arrays it returns live for one step; the runner releases them afterwards.