PostgreSQL is definitely a boost to performance, especially if you offload the DB to a dedicated server (depending on load, can even be a cluster)

Nevertheless, it probably has much to do with how it’s deployed and how many proxies are in front of it, and/or VPN. If you have large numbers of containers and small CPU/low memory hardware, and either running everything on one machine or have some other limitations, it’ll be slow.

Admittedly, I’m not very familiar with the codebase, but I feel Apache isn’t improving the speed either. Not exactly sure how PHP is nowadays with concurrency and async, but generally a microservice type architecture is nice because you can add more workers/instances wherever a bottleneck emerges.

Nextcloud with the “Notes” plugin and app.

https://nextcloud.com/blog/nextcloud-notes-secure-note-taking-integrated/

https://github.com/nextcloud/notes

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