[routing-wg] Clear ip bgp * timing

Hi all I have a lab configured with bgp and bundeled with a software that can measure the convergence time of the network when I entered this command: clear ip bgp * I have got the convergence time : usually it 60 sec but some time it 43 sec I don't have any explination for the second result do any one have Thank you Best regards Eng Amer Alghadhban COE SANS-GCFW CEH, SCNP, CCNA