Link-state topology takes long time to get updated

Router is configured for distributing OSPF routes into BGP-LS and ODL is peering with the router. When size of network is very big (approx 700 nodes, 10k+ prefixes per node, 1200 links), link-state topology takes a long time to update (order of hours). Loc-rib gets updated in relatively short time (minutes). Problem is especially severe if number of prefixes per node is very large