Extreme slow sync of "resources"

Hello,

I’m having the same issue, as mentioned here: Sometimes latest changes get reverted (during sync?)

I’ve switched from the file-system sync target to WebDav and the sync appears to be working, but painfully slow.

 16 2020-03-28 21:41:13: "RevisionService::maintenance: Starting..."
 15 2020-03-28 21:41:13: "RevisionService::maintenance: Service is enabled"
 14 2020-03-28 21:41:13: "RevisionService::collectRevisions: Created revisions for 0 notes"
 13 2020-03-28 21:41:13: "RevisionService::maintenance: Done in 103ms"
 12 2020-03-28 21:41:15: "Scheduling sync operation..."
 11 2020-03-28 21:41:15: "Preparing scheduled sync"
 10 2020-03-28 21:41:15: "Starting scheduled sync"
  9 2020-03-28 21:42:13: "Running background sync on timer..."
  8 2020-03-28 21:42:13: "Scheduling sync operation..."
  7 2020-03-28 21:42:13: "Preparing scheduled sync"
  6 2020-03-28 21:42:13: "Starting scheduled sync"
  5 2020-03-28 21:42:13: "Synchronisation is already in progress. State: in_progress"
  4 2020-03-28 21:47:13: "Running background sync on timer..."
  3 2020-03-28 21:47:13: "Scheduling sync operation..."
  2 2020-03-28 21:47:13: "Preparing scheduled sync"
  1 2020-03-28 21:47:13: "Starting scheduled sync"
193 2020-03-28 21:47:13: "Synchronisation is already in progress. State: in_progress"