Discovery process is slow - AWS Perspective

Discovery process is slow

If you are importing a large number of accounts at once, the discovery process might become slow. This often happens due to API rate limiting while it tries to discover resources. We recommend that if this occurs, that you add Regions in a gradual manner allowing the discovery process to run fully on those Regions, before attempting to add more.

The number of Regions that can be added at once will depend on how many resources they contain.