Using distrib.singlePass does not work for expand-requests. Even after the fix provided to SOLR-6812, it does not work for requests where you add start and/or rows.
Faster searching limited but high rows across many shards all with many hits
distrib.singlePass does not work for expand-request
Add a distrib.singlePass parameter to make EXECUTE_QUERY phase fetch all fields and skip GET_FIELDS