Comment 2 for bug 1698792

Closer examination reveals the following:

1. In "normal" times, gnome-shell cpu usage could vary between around 7% and go up to 50%
2. The cpu usage figure keeps going up and down frequently
3. However, the problem starts when I press the Left Win key and enter the activities overview/search mode
4. gnome-shell cpu usage starts steadily rising.
5. As I type in the search box gnome-shell rises to 100% cpu. UI becomes unresponsive.
6. I click on the app icon which I want to launch
7. After a few seconds, cpu usage comes down. Wait indicator starts rolling
8. After a few seconds of wait indicator, the app launches

Even if no app is selected, simply entering overview mode and exiting it pulls gnome-shell down