Here's my quick example of a performance issue with 2.6.2:
1. Video playback is smooth with map, default gauge, and full power.
UPDATE
2. Video playback is choppy at best, but the gauges and map look good. The choppiness DOES include choppy map and gauge (frame stopping patches gauge and map stopping)
Reboot computer
3. Same result
I have a completely unmodified Virb setup, and the video is just the imported straight from camera video
Laptop: Lenovo Yoga, Core i5, 8GB RAM, Windows 8.1 latest updates (8/21/2014), 256GB SSD with plenty of space, Intel 4000 graphics, High Performance setting.
GoPro video playback in VLC player is perfect at 1080p 30fps