Massively increase gpu performance on nook hd+ by reducing screen resolution
This is probably going to seem ridiculously obvious, but whenever people talk about laggy gaming performance or other slow gpu intensive events, the usual answer is that the 1920x1280 resolution display is just too many pixels for the gpu in our beloved devices to handle. However I've never seen anyone say they've tried lowering the resolution to test.
I used "epic citadel" set to ultra high quality graphics as a benchmark, and used "resolution changer pro" from the play store to change display resolution. Leaving it at the default 1920x1280 resolution, the epic citadel benchmark gave an average of 13fps. I then dropped the resolution to 1152x768 (the closest to 720p at 3:2 aspect ratio) using the resolution changer and ran it again. The average fps at the end of the benchmark was now 27fps. That's a pretty huge increase.
I also tried antutu but it kept crashing halfway through the 3d benchmark on all resolutions, but was definitely much higher fps on the lower resolution.
Other games which were laggy (such as gangstar Vegas) at high graphic settings preform much smoother in the lower resolution. While it's fine for games, obviously using a non native resolution reduces the sharpness of things like text in apps and so it needs to be changed back after you're done gaming.
As I said at the beginning, it seems obvious that reducing the resolution increases the performance, but I just wanted to post as I couldn't see any anecdotes from anyone that had tried it.
Please note that changing resolution is different from just changing dpi.