I have a Raspberry Pi 3. It's been running Raspbian for many months, and I've been having okay success using GLES2 to drive a small display.
However, recently I did a full update -- apt-get update, apt-get upgrade, raspi-config -> update
Now, my program runs at < 1 fps.
The hello_videocube.bin demo now runs at 1-3 fps, with very stuttery progress. I seem to recall this demo running smoothly before.
However, camera capture (raspivid -t 10000) runs smoothly enough.
I can't 100% guarantee that it was something in the updates that caused this to happen, but if it wasn't, what else could it be?
And what can I do to go back to the high-performing Pi I know and love?