@Suever Yes! Now I notice the speedup. I can also notice how it doesn't try to update until I have finished typing, which is good. Great job! As for the exact value of the delay, I don't know. Current value seems to be fine
Also, the other issue ("Run" button not responding) seems to have improved. Now only occasionally does it not respond, and when it doesn't it usually suffices to press the button again, without having to refresh the page (I have been trying it lately with quite a few animated ASCII art challenges)