11.11Repeatable vs non-repeatable streams

High-level only:

Repeatable

Data can effectively be read again.

May require:

memory
or
temporary file storage

Non-repeatable

Consume once.

Potentially lighter-weight.

But if downstream logic tries to read it twice:

problem

For interview purposes:

“For large payloads I'd pay attention to streaming strategy rather than automatically materializing the entire result in memory.”

Excellent.