Another oldie but goodie, and it’s best demonstrated by example:
Yes, that’s a screen saver running in the background, behind whatever work you’re doing. And if nothing else, it’s a great example of the progress of our CPUs and GPUs since 2002. In the original hint, I noted:
On my G4/733 with the GeForce3, this is simply amazing. The new “flurry” screensaver is running right now on the destop at 1600×1200 in thousands, iTunes is playing, the ink recognition floater is open, and yet the CPU utilization is averaging at or below 50% of thereabouts
Today, I’m testing it on a 5K iMac (5120×2880) with a second connected 4K (3840×2160) display—a total of 23,040,000 pixels, or 12 times as many pixels as in 2002—with Flurry running on both screens, and the CPU usage is somewhere around 10% to 15%. (Flurry does send the iMac’s fans into a tizzy, though.) Other screen savers are even less intensive, and don’t send my iMac’s fans into high gear.
I can’t imagine actually working this way for very long, but it is kind of interesting. Here’s how to start (and more importantly, perhaps, stop) a background screen saver.