The Contact Delete process can be slow for a large number of contacts. To expedite this process, the best approach is to stop the current delete process and delete smaller groups of contacts. This allows the system to handle smaller chunks of data more efficiently.

Stop Current Process: Stopping the current large delete process helps avoid system overload and potential timeouts.

Delete in Smaller Groups: By segmenting the contacts into smaller groups and deleting them in batches, the process becomes more manageable and faster.