A better link:
https://github.com/open-noodle/gallery
Seems to be a fork of Immich. They claim performance is a goal but it's still written in Node.JS? Curious.
I tried to do something very similar a while back (https://github.com/denysvitali/immich-go-backend) but didn't fully follow through. Immich sucks, sadly, performance wise and in terms of storage (they don't support S3, WTF).
I'll eventually get back go it and complete my port.
For more context: https://news.ycombinator.com/item?id=46171726