To do that, you’d have to buffer records from the file and dispatch threads to perform your task. Lazily loading can be preferable for large workloads, but it r

To do that, you’d have to buffer records from the file and dispatch threads to perform your task. Lazily loading can be preferable for large workloads, but it requires fine-grained threading. (And probably dedicated reading/writing threads and/or locks.) That’s a lot more work than this, though.