Honestly, Vizzie is never going to be fast. If optimization is what you want, you should be researching how to effectively use jit.gl.slab, make GL contexts, and send textures around using send and receive. Vissie uses only on the CPU matrix operators, and will not be as fast as the *graphics* card for doing visual effects.
Get your head around basic GL with Jitter use @automatic 0 and learn about triggering order for drawing GL, and then use slabs / textures and even render to texture (@capture and the jit.gl.sketch workaround using forced drawing to capture whole scenes to a single texture). These techniques are more complicated and nuanced, but will give you an amazing about of flexibility that vissie simply will not ever be able to give you.
The fact that vizzie was not done in GL is actually kind of a shame, as it makes a lot of sense to have it there.