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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.
@Raik
Not sure about the wear on the flash, but I would argue that you still would see a flickering clock face every seconds.
As far as I understand: offscreen buffers are not drawn faster. In your case you would have to redraw the complete watch face every second because the (analog) watch hand moves. So between seconds you would need to redraw the area the hand has crossed to restore the watch face.
Take a look at @Gordon s image clock
It is not flickering because it only draws the background once and then for every second updates only a small (rectangular) part of the background where the time is being displayed.
But I guess you could do something similar for your clock too.