Performance expectation on macos

[buhrmann]

Hi, I came across taichi and your voxel challenge because I was looking for a quick way to render some voxely creative coding-type project. While the output looks really nice, I was wondering if it's normal that on macos I get about 1 frame per second for most of the more complex examples (using the vulkan mode). Switching to CPU I get at least 5 to 6 frames. Is that what you'd expect more or less? Or is there a way on macos to get this into the 30fps range somehow? Would it be possible in taichi to port this to (render using) metal e.g.?