Right, thanks for clarifying. Yes, the desktop app isn’t as fast as it should be. On mobile we fixed this with Element X; on desktop we’re in the middle of the transition still. The conf talk on Element X Web is pretty good at explaining where it’s at: https://youtu.be/z0ULOptq2vk?t=240
Edit: also, on macOS on Apple Silicon, you can use Element X on macOS as a desktop app, and it works impressively well.