Bonus! Supplemental material for 0x21.1 if you were curious about the rig/thing we're using to demonstrate slowness.
00:00 Our reference
01:22 Using a NoOp (null) as a reference, sampling
07:15 Sample regions - take 1
10:30 Luminance! And how to NOT demonstrate something.
12:30 Sampling the image, pixel by pixel (a loop refresher)
17:45 Testing this against the reference
20:33 How slow is this? (very)