
342 IV Performance
Device Resolution %of1280 × 1024 %of1920 × 1080
Motorola Xoom 1280 × 800 78.13 49.38
Apple iPad 2 1024 × 768 58.63 37.06
AppleiPhone4S 960 × 640 46.89 29.63
Samsung Galaxy S2 800 × 480 30.00 18.52
Table 24.2. Resolution comparison of desktop and mobile panels.
full-screen or large-quad operations can easily become a bottleneck since these re-
quirements scale proportionally with the number of output pixels. Memory band-
width is also a major power drain, making limiting bandwidth doubly important.
Common large-quad operations include postprocessing effects and user-interface
composition.
Within mobile devices, there is also a large