An interesting episode is found in the article about Pixel camera.
Mark the Left said that the owners of Pixel and Pixel XL should always keep HDR + mode is activated. He believes that people are simply no reason to cancel it. HDR is a problem in other smartphones and devices in the HDR + molts Nexus is that the processing of the image takes a few seconds. In the case of "pixels" it happens instantly.
HDR-image, as a rule, are created by combining multiple images with the exposure, exposed to different areas, but Pixel HDR implements a very different way. Instead, the camera "pixel" underexposes each image and improves via a mathematical "magic".
We have a max too HDR shoots quickly, apparently without shooting with different metering as it does classic HDR. Chances are, too, is a software processing hdr, moreover this system conflicts with the mode enabled camera 2api, causing it to hang the camera. A normal shooting is operating normally. Apparently hdr in drain chamber conducts processing at a deep level.