This extension is very laggy and clunky to use. It's such a great feature that mildly pisses you off due to how slow it is to load anything. Not to mention the random days where I have to refresh youtube multiple times with multiple tricks to make the extension features actually show up. It's in dire need of heavy optimization work. Great idea limited by the execution.
What do you mean? What exactly is laggy? Try to disable other extensions, maybe you have a conflict with other extensions. In my case, it's working perfectly.
