Why does the official Lemmy docu say:
Lemmy uses roughly 150 MB of RAM in the default Docker installation. CPU usage is negligible.
whereas the Node.js server alone (dessalines/lemmy-ui
container) consumes over 100 MB?

I would have easily ordered a 2 GB VPS in the first place, but I trusted the documentation to be up-to-date.
It appeared that lemmy-ui also causes random cpu spikes of load ca. 25.0 which made my small VPS unresponsive for a few minutes every few hours.
I have observed great performance improvement with mlmym but it lacks some basic functionality, so now I'm using Photon and with satisfactory result (
btop
):