ttrpg

Thinking about it, my perspective on power requirements is probably quite skewed atm - I started using it about 4 editions ago, when there were some particularly bad problems with loading times, but it has gotten noticably faster a several times over the past few years. Loading times when I was on a broadband connection could stretch into a couple of minutes for some players, but now I'm on fibre it's just the one guy with shitty internet that suffers that. With just a GM and map display I can't really imagine you'll be doing enough to cause problems.

If you do need to speed things up, small worlds help a lot, along with limited extra modules. A world is mostly made up of scenes (maps), actors (PCs, NPCs) and items (nearly everything else) - smaller, lower resolution maps help a lot, but so does regularly clearing out unused actors and items. If you need to go back to them intermittently, compendia will let you store all 3 on your hard drive, so the game won't try to immediately load it all, but you can still access it and load it in quickly if you need to.