DrawIndirectMultiSomethingfor multiple objects at once. Not sure that all these workers benefit this much from walking the scene graph in parallel though... But fortunately, this is all very high-level from the gfx-rs perspective so could be done on top of it.
drawPrimitives(0,3)), the only real difference I see is that there is no notion of shader program... Gnm has it implemented this way as well, and I supposed DX11 too, so everyone but GL?.. Hence, that is a problem with our shader abstraction - just something to think about.