title: Measuring execution time using Micrometer and WebFlux
body: <p>I'd like to measure the length of some async calls made with WebFlux. I've been reading through various sources, as I understand the <code>@Timed</code> annotation is working with AspectJ and basically just starts a timer before the method call and stops it after. This obviously won't work with async methods. </p>
  
  <p>Are there any solutions for WebFlux or the only thing I can do is passing around execution timestamps, cluttering my application logic?</p>