YSK: Slow timelines on Pixelfed can be fixed by enabling caching!
It's disabled by default due to the overhead for small servers, however its really easy to enable and customize the TTL of the feed!
I'll be updating https://docs.pixelfed.org later today with performance tips
https://github.com/pixelfed/pixelfed/blob/dev/config/instance.php#L25-L41