Jeremy Reizenstein 280fed3c76 cuda streams for color/density in NeRF ...

Summary:
Inside the implicit function, the color and density calculations are independent and time is saved by putting them on separate streams.

(In fact, colors is slower than densities, and the raymarcher does some calculation with the densities before the colors. So theoretically we could go further and not join the streams together until the colors are actually needed. The code would be more complicated. But the profile suggests that the raymarcher is quick and so this wouldn't be expected to make a big difference.)

In inference, this might increase memory usage, so it isn't an obvious win. That is why I have added a flag.

Reviewed By: nikhilaravi

Differential Revision: D28648549

fbshipit-source-id: c087de80d8ccfce1dad3a13e71df2f305a36952e

2021-06-02 05:43:13 -07:00

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nerf

cuda streams for color/density in NeRF

2021-06-02 05:43:13 -07:00