Looks like Microsoft is quite pumped up when releasing Xbox One Preview builds. Just after releasing a preview build yesterday, a new build is being pushed out for Xbox One Preview program members today.
OS version released: rs1_xbox_rel_1610.161105-1400 Available: 6:00PM PDT 11/6 (2:00AM GMT 7/11)
Performance fixes when navigating Home.
You have to go to All Settings > System > Console info & updates, to get this update for your Xbox One.