Measurement of response time in an open rast

Question

What is the best way to do this?

I was thinking of something like:

public void Initialize(IPipeline pipelineRunner) { pipelineRunner .Notify(CaptureRequestStartTime) .Before<KnownStages.IBegin>(); pipelineRunner .Notify(LogRequestTimeWithStatsd) .After<KnownStages.IEnd>(); } 

but some advice from someone who knows the insides may be helpful.

Can I add custom HTTP handlers to an open rast?