title: Multiple, random DNS lookups for assets from the same subdomain
body: <p>I was checking load performance of a website, and could see there are multiple DNS lookups for the assets even if its all hosted in the same subdomain. Also this is random, one asset might have DNS lookup in one load, but it might not have in another. (Attaching screenshots of the network tab)</p>
  
  <p>What would be the cause of this behavior and how to fix this?</p>
  
  <p>Load 1
  <a href="https://i.stack.imgur.com/CBFC2.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CBFC2.jpg" alt="Network Request 1"></a></p>
  
  <p>Load 2
  <a href="https://i.stack.imgur.com/wucri.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wucri.jpg" alt="Network Request 2"></a></p>