This project makes the WiredTigerOplogManager::_oplogJournalThreadLoop cease calling waitUntilDurable(), which is what replication wants to trigger after each round of batch application – so that readers with 'j' read concern can see the data as quickly as possible. Therefore, replicationBatchIsComplete should instead trigger the WiredTigerJournalFlusher thread, whose sole responsibility is to call waitUntilDurable(), to run immediately.