title: Difference between export to a jar and running directly in eclipse
body: <p>I am writing a java program, and I have a test to see what is the performance of my program.</p>
  
  <p>While it has difference result when I run it directly in eclipse and export to a jar.</p>
  
  <p>Running directly in eclipse is 2 times faster.</p>
  
  <p>Can anyone tell me about the difference between:
  1. Run from eclipse
  2. export to jar</p>