We measured the time it takes for a CoFi-enabled recipient to upgrade a partial-fidelity image to full fidelity. Figure 8 shows that the largest fraction of the time necessary for this fidelity upgrade is due to transmission (Transmission), and that only a small fraction of the time is spent on displaying the upgraded images in the application (Display). In other words, the overhead caused by CoFi's use of the API is very small. While we were not expecting the overhead to be significant, these results confirm that CoFi supports these kinds of adaptations in practice.
