title: Hosting images on separate sub domains
body: <p>My company hosts about 30 web sites all sharing the same code base and reusing many of the same images.  Right now, the images for all of the sites are hosted on the one domain, and then every other site has to link to those images.</p>
  
  <p>i.e.,
  www.example.com/images/hello.jpg</p>
  
  <p>and on www.example2.com we have something like:
  <code>&lt;img src="http://www.example.com/images/hello.jpg" /&gt;</code></p>
  
  <p>Recently someone told me that I should be putting all of these shared/static images on a subdomain, but I don't see the advantages to this. I have heard that there might be a slight speed increase, but I've also heard that it can complicate things.  Can someone elaborate?</p>