Comparing network utilization of Lemmy, Kbin and PieFed says that PieFed uses 5x less data (on e.g. a mobile connection) despite showing 5x more posts, i.e. overall a landing page is 25-fold more efficient per post than Lemmy.

I doubt this has anything whatsoever to do with Rust and more about choices as to what data is sent when.

As it should be.