GTK GL widgets use very high CPU
@vanvugt
Submitted by Daniel van Vugt Link to original bug (#787704)
Description
GTK GL widgets use very high CPU
For example: gdkgears: 77% CPU glxgears: 2% CPU es2gears: 4% CPU
I haven't profiled it yet but a quick look at the code makes me suspect glReadPixels;
https://www.khronos.org/opengl/wiki/Common_Mistakes#Texture_upload_and_pixel_reads https://www.khronos.org/opengl/wiki/Synchronization