What do you want the community to do? Pitch in with money from their day jobs so a gamedev savior can come in and make things render slightly faster? At the expense of hideous unmaintable code that only a gamedev genius could understand ?
I'm not saying that's the correct approach for GTK, just noting is not an absurd idea.
And FOSS devs always create non-hideous maintanable code that everybody understands /s