Screensaver spikes my CPU

I’m not sure how this screensaver can spike my CPU on a 2.2 GHz quad core i7 Macbook Pro with a 1.5GB graphics card and 16GB of memory. I just turned off the screensaver finally. I also get periodic blips where the app will turn off and display my previous desktop background. When functioning normally this app is cool, but these 2 issues are annoying.

Woottang80 about Living Earth - Weather & Clock