Custom Diagnoser for average CPU and RAM usage during the test

I would like to add columns to the benchmarks for the average CPU and RAM usage during the test ([I'm benchmarking network libraries](https://github.com/JohannesDeml/NetworkBenchmarkDotNet)).
I tried using `AddDiagnoser(new EventPipeProfiler(EventPipeProfile.CpuSampling));`, but due to the sheer number of calls in my benchmark, the resulting file is multiple gigabytes in size and takes a long time to process.

I was thinking about creating a custom diagnoser, that uses [PerformanceCounter](https://stackoverflow.com/questions/278071/how-to-get-the-cpu-usage-in-c) for CPU and RAM and takes samples every X ms and calculates an average at the end. Is this possible by extending the `IDiagnoser` or can I achieve this in any other way?