I'm attempting to track a slightly longish shot, and I don't want to fill up all my ram.
I can play the animation with ⎇ AltA and blender caches and displays uncached frames in near real-time (~35 fps with 60fps footage). Blender will track cached frames faster than real-time.
Yet when trying track uncached frames, blender takes longer than 10 seconds per frame! Often as long as 15 seconds.
What is going on here? Why does tracking uncached frames take far longer than the time needed to both cache and track separately?