Wgpu-rs: Multiple times more GPU usage on Vulkan than DX12

[OptimisticPeach]

I modified the water example to set the SIZE constant to 100, and changed the framework file for examples to forcibly use DX12 and Vulkan.

When running in Vulkan, my GPU usage looks like this:

When running in DX12, my GPU usage looks like this:

[OptimisticPeach]

Average FPS for Vulkan is 42.
FPS for DX12 is [37, 42]. Average is 38.

[cwfitzgerald]

Windows gpu measurements are notoriously inaccurate/misleading, does some rivatuner based tool (afterburner, xoc, etc) also report similar numbers?

[OptimisticPeach]

Afterburner shows that the DX12 version is doing about the same amount of work.

Thanks for the heads up!