100% = 31 fps
150% = 45 fps
200% = 60 fps (max)
So page-zoom in the browser can be used to gain more speed on systems with low-end gfx, like the onboard Intel HD 2500,3000,4000. The only catch is that the quality goes a little bit down of course.
I would love Ashley to include zoom control in the browser API so we could add this feature to our game settings.