> Writing down a thing you’ve read (/heard/etc) improves your memory and understanding, at the cost of disrupting the flow of reading.
Flow disruption, in the case of self-paced learning, is likely a good thing, even though it feels like it's slowing you down. Even though it _is_ slowing you down. The act of getting back into the flow requires some level of retrieval from long term memory, and retrieval is practice at remembering. So anything that helps you practice remembering what you just read is useful, and anything that helps you read more pages per hour but does nothing to change how much you remember per hour is wasteful.
Flow disruption, in the case of self-paced learning, is likely a good thing, even though it feels like it's slowing you down. Even though it _is_ slowing you down. The act of getting back into the flow requires some level of retrieval from long term memory, and retrieval is practice at remembering. So anything that helps you practice remembering what you just read is useful, and anything that helps you read more pages per hour but does nothing to change how much you remember per hour is wasteful.