Graphics Reference
In-Depth Information
good way to eliminate noise and help us focus on the methods that we are calling
explicitly from our code.
Core Animation
The Core Animation tool is used to monitor Core Animation performance. It gives a
breakdown of FPS sampled periodically, taking into account the parts of the animation that
happen outside of our application (see Figure 12.4).
Figure 12.4
The Core Animation tool, with visual debug options
The Core Animation tool also provides a number of checkbox options to aid in debugging
rendering bottlenecks:
▪
Color Blended Layers
—This option highlights any areas of the screen where
blending is happening (that is, where multiple semitransparent layers overlap one
another), shaded from green to red based on severity. Blending can be bad for GPU
performance because it leads to overdraw, and is a common cause of poor scrolling or
animation frame rate.
