title: Do I always have to think about performance?
body: <p>I come from a DBA world and performance has always been an obsession. I am turning to development and I always think about performance, constantly, all the time.</p>
  
  <p>Reading on SO sometimes seems that performance does not matter. For instance for evangelists on hibernate (or any other ORM).</p>
  
  <p>As a developer, when do I have to think about performance and when not?</p>