Quote Originally Posted by KurtE View Post
In itself it would have probably 0% difference in possible speed.
As for Gauge drawing with flicker and the like. I added code to the ili9341_t3n to help speed things up. In particular the code with each graphic primitive in frame buffer mode, would keep a bounding rectangle of what parts of the image changed since the last updateScreen was called and when you call updateScreen it would only update that portion of the display, which in cases of a needle changing a little bit was only a small fraction of the full pixels of the display.
I'm curious as to how the automatic bounding box works. Does one need to do any more than just set useFrameBuffer(true)? Is it basically an auto "setClipRect()"? Or is it a more sophisticated routine that tightly bounds what's changed? Wouldn't a clipping rectangle get very large on a gauge when the needle is at 45, negating the benefit?