In two hours I can clean a two or three bedroom, two bath, house unless they're very messy or have lots of hairy pets.
This includes:
Wiping down the kitchen, including the cooker top and the sink. Basically all exterior surfaces.
Clean both bathrooms thoroughly, including the grotty corners of the showers.
Dust the whole house, unless there's a lot of stuff that needs moving. Window sills, shelves, furniture, etc.
Hoover the whole house, and wipe a fair number of skirting boards (I sort of rotate them so they all get done once a month.)
Mop hard floors.
I can also clean some windows if needed, or maybe some other extra thing like tgat
The key is to wear a toolbelt/apron that has all the tools I need, and to use the right chemicals and tools for every job. Also to follow a clockwise, top-to-bottom system that cuts down on the amount of unnecessary movement.