BGP routing table update time

Hi all, I’m trying to parse birdc output to process routing tables. While each route entry has a timestamp associated with it, I can’t find a convenient way of determining when the contents of a table were last changed, other than parsing the entire table and checking the timestamps of each route. I’d like to avoid this, so is there a better way of determining when a route table was last updated that I’m missing? If not, would a patch adding a “time of last update” value to the table be of interest? Thanks, Tom P