profiling

https://github.com/brendangregg/FlameGraph

We recently added support for dynamic tags in Ruby and Python integrations. We need to do the same in our Go app.

Here's an example from our python docs:

# You can use a wrapper:
with pyroscope.tag_wrapper({ "controller": "slow_controller_i_want_to_profile" }):
  slow_code()

# Or you can add / remove tags manually:
pyroscope.tag({ "controller": "slow_controller_i_want_to_profi

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.