Avoid reperforming checks against ruleset where check has already been run
Avoid reperforming checks against ruleset where check has already been run and no changes have been made to the underlying files. At present it seems like all rules are re-processed, artwork re-fetched etc.
This definitely shouldn't happen. Can you provide an example, or send us a debug archive ("Help" > "Download debug archive" to firstname.lastname@example.org )?
If the rescan button is pressed that will re-assess albums - that's because the album might have changed. You can use the "Rescan for new and updated albums" if you want to avoid rescanning existing albums.