In my experience, the speed of a terminal responding to a ^C is highly correlated with the speed of its output. It's true that there's no need for a slow render

In my experience, the speed of a terminal responding to a ^C is highly correlated with the speed of its output. It's true that there's no need for a slow rendering terminal to also be slow at reacting to ^C, but it always tends to be the slow terminals that jam up. I agree totally with the speed of display updates not really being important - if my terminal is spewing hundreds of pages of text, it doesn't matter whether it's redrawing at 50fps or 5fps. My hunch is that the slowest terminals are the ones that insist upon drawing every single character of output. They then end up with a huge buffer of text that needs to be rendered even though the ^C may have been sent and the noisy program has been terminated.