20180123 - AI Denoise Fail

Let take latest optimized numbers from this tweet.

Their optimized version would be 20 ms/frame for a 4K denoise. So at 30 Hz you'd have only 13.3 ms left to render something.

Now lets look at TitanV's peak capacity in 5 ms divided by 1080p pixels.

Fairly obvious from those numbers that the costs are astronomically high, and that existing methods of temporal noise reduction are orders of magnitude faster.