It seems like you've missed the point. Chris isn't making any claim that the run time is fast compared to an in-core production renderer. He rendered Moana in 8

It seems like you've missed the point. Chris isn't making any claim that the run time is fast compared to an in-core production renderer. He rendered Moana in 8GB of GPU memory, which is smaller than the input data. From the advertisement, it's clear you are a 3Delight fan (employee?), but I bet 3Delight cannot do that: render Moana without using more than 8GB of CPU memory. The algorithm here to do out of core rendering is the important part, and it doesn't make sense for you to try to compare in-core CPU rendering to out-of-core GPU rendering. > I would love to see a breakdown how much of these 5hs is owed to the fact that the data doesn't fit on the device. I already know it's pretty close to 100% of the time spent handling out-of-core requests, that's not surprising, nor is it a bad thing (though it probably can be improved). If it were a CPU renderer doing this - streaming the geometry & BVH, the result would be the same (or much worse if streaming from SSD instead of an external ram of some sort.)