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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
Interesting - thanks! As I understand it the last touch position is stored, but if something is taking a long time to draw previous positions will be left. It's sort of intentional as for things like scrolling, you want to redraw as fast as you can but you don't want to queue up redraws for previous scroll events.
Honestly, I feel like if your game is taking so long to render a frame that this is an issue, that might itself impact the playability of the game?
There are some hints for speed on http://www.espruino.com/Performance that might help you I guess?