Lets say i get around 250fps using the chromium 64 bit version when everything is running smoothly.
The original version of the game doenst have this (or it might just not throw the errors in the console). or that is when the console doesnt get spammed with errors about missing textures, wrong vertex files or sprite shaders.
I always use this because it comes with quite a large boost in performance in general. So you can enable the chromium beta to have the 64 bit binaries.