Speeding up terminal output?

Don't redraw the whole screen every time, figure out what parts changed and then redraw those.

https://docs.python.org/3/howto/curses.html

Or libraries that improve on curses:

• https://pypi.org/project/blessings/
• https://pypi.org/project/asciimatics/

I may have found a solution:

https://stackoverflow.com/questions/7392779/is-it-possible-to-print-a-string-at-a-certain-screen-position-inside-idle

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Instead of clearing the screen and drawing it again (which is what's causing the visible flickering, I can use escape characters to position the cursor at the top-left of the window and then draw over the existing screen.

Implemented in python 3.7, it looks like this:

def draw(self, clear_first=False):
    """ Prints current screen to the output window """
    if clear_first:
        self.clear()

    stdout.write(f"\x1b7\x1b[0;0f{self.array_to_string(self.screen)}\x1b8")
    stdout.flush()

It's already quite a bit better, and could probably be improved even more by only drawing over the elements that need to be updated,

You could use a faster terminal.

alacritty is a GPU accelerated terminal, https://github.com/jwilm/alacritty