Thank you for your feedback. There was a bug on the site that caused the slowdown. The code is animated to show how it operates in connection with the output, and there was a bug that contributed to the delay. However, I believe I have fixed it.
is that likely to you? more likely i am on a chromium or firefox browser on a standard computer experiencing a laggy demo experience with no user modifications. i'm simply making the OP aware that "works on my system" is not true for me, since he stopped getting feedback. this is a kindness.