No not at all hard on resources. I had speed channel, lat G, two temps, track mapping etc etc without an issue. On the scheme of things, the volume of data being processed is fairly small.
This thread did inspire me to look for some “official” minimum specs, but I didn’t find any beyond that it supports windows only.
n.b. We are talking about RS2 here, NOT RS3 as RS3 is not designed for the karting datalogger range.
Another thing I did, although it was kinda hacky, and definitely not supported is run RS from a dropbox folder so that it was 1) backed up and 2) accessible from different computers.