As recently announced at GDC, we have partnered with NVIDIA to enable a rich set of hardware performance counters inside PIX. When running on an NVIDIA GPU with the latest driver (378.92) you will see ~300 newly available counters. These can provide much deeper insight into the rendering and performance characteristics of your workload than was previously possible.
The latest version of PIX also adds:
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File IO Traces
This latest version of PIX also adds support for File IO tracing, letting developers improve disk IO patterns.
Shader Edit & Continue
HLSL shader code can be edited directly inside PIX. This can be useful for prototyping and optimizing shaders, as it can greatly reduce the turnaround time when trying out different ideas.
Pixel Cost Visualizer
The new Pixel Cost visualizer colors the scene according to the approximate rendering cost of each pixel. The brightest areas of the resulting image indicate which parts were the most expensive to render.
