If its just an export then see this Steps to change PHP version in right way - #11 by josephgodwinke this the quickest way for you users to get their dumps. Ideally your customer should be given favorable ways to get their data and the best way is to make backups mandatory so that the dumps go to their backup directories and get synced to their cloud. You cannot compare the download speed of an s3 compliant backup/gdrive/mega etc and your server downloads