title: How to understand performance problems in "Native or Optimized code" when using DotTrace Performance
body: <p>I am using DotTrace Performance (v 5.5.4) on my web application. I am trying to optimize the page load time after cold starting the MVC 5 application. Looking at the main thread on the snapshot, it seems like majority of the work is being done in "Native or Optimized code". Thats seems a little too generic and is not really helpful. What does that really mean and how do I dig into it further? </p>
  
  <p><a href="https://i.stack.imgur.com/32sOV.png" rel="noreferrer"><img src="https://i.stack.imgur.com/32sOV.png" alt="enter image description here"></a></p>
  
  <p>Note : I found a similar <a href="https://devnet.jetbrains.com/thread/313041" rel="noreferrer">post</a> on the jetbrains forum but there did not seem to be any resolution posted there either.</p>