About Batch Reader

Hi. I’m asking because I need to understand the architecture of the Couchbase.

In architecture of data service,

Batch Reader : Enhances performance by combining changes made to multiple items into batches , which are placed on the disk queue, to be written to disk.

I don’t understand this.

Is it similar to the feeling of compression?

If you have an example or a document to refer to, I would appreciate it if you could share it with me.

Thank you.