Bulldozer vs Motobike Kernels

Here is a comparison of our 2 rendering kernels for the interior scene from the first example. For both kernels the portals are applied for room windows. On the left image, the Bulldozer kernel executes 4 render iterations in 34 seconds while on the right image the Motobike does so in 19 seconds (1.8x faster) but with more noise.

Bulldozer kernel may generate less noise with the same number of render iterations for scenes with mostly night lighting, portal lights + HDRI, portal lights + directional light sources. However, Bulldozer kernel may take more time for the same number of iterations compared to Motobike kernel because it generates more rays per pixel.