The new performance floater can be found under the World Menu, Improve Graphics Speed. Here you can:
See your FPS (Frames per Second)
Adjust your graphics settings
See the complexity of the avatars around you and set the Max Complexity.
See your avatar’s complexity with your attachments. Here you can see a ranking of each attachment and how it may effect your performance. You can even use this menu to detach attachments.
Your active Huds.
Resolved Issues
SL-16841 Auto FPS causes stalls when shadows turn on and off.
SL-15923 The 'Advanced Lighting' and 'Shadows' settings are not greyed out and can be changed in the Performance floater after choosing first or second shortcut
BUG-231199 Disabling the avatar rendering type also derenders one's own avatar nametag
SL-15737 remove context menu for self in "Avatars nearby" list
SL-15736 Show checkmark in the menu while Improve Graphics Speed floater is open
SL-15667 Complexity value is not updated in Advanced floater
SL-15626 Changing quality settings does not change display or fps
SL-15625 Low digit of fps sometimes does not display (when fps >= 100)