@erikk@chaos.social hm I hadn't realised there's a worker for that too, but workers are quite limited, basically just splitting the process over more cpu threads.
my synapse-media-proxy will be a successor to the current Nginx caching I have for my media requests, by making both upload and download requests go to the fast vps, which then slowly syncs them back to synapse for long term storage. This should hugely speed up access of recent uploads, right from the first request, while currently that only works after one request fully finished and it's in the nginx cache + uploads can be quite slow too