profiling

https://github.com/brendangregg/FlameGraph

Sometimes its possible for the sidebar to out of sync with the current route. To reproduce:

1. Select single view
2. Select comparison view
3. Hit "back" button

For C projects, it would be very useful to have a C API for Vulkan and OpenGL. I'm unsure how feasible this is for DirectX 12 though.

There are many instances of INSTR_CREATE macro documentation saying things like this:

* \param dc  The void * dcontext used to allocate memory for the instr_t.

That should have a # to link up the instr_t type.