Performance issue observed  while associating router to VPN

1. Create Network, Subnet1I(IPv4) and Subnet2(IPV6)
2. Create Router and associate subnet to it.
3. Check FIB --> PASS
4. Create L3VPN and associate router to it.

Observation:

 Updating RD value field take few seconds for each FIB entry and it is happening for one by one route entries.