title: Good performance metrics API?
body: <p>I'm working on writing an API for gathering performance metrics in a Java application. These will consist of somewhat arbitrary things, but for now I'll mostly be gathering &amp; recording run times of various parts of the application &amp; other counts.</p>
  
  <p>Are there any good performance metric APIs that handle a wide variety of gathered metrics? Any language is fine. I'm looking for inspiration.</p>