title: How to compare differences in very large csv files
body: <p>I have to compare two csv files with a size of <strong>2-3 GB</strong> each, contained in Windows platform.</p>
  
  <p>I've tried to put the first one in a HashMap to compare it with the second one, but the result (as expected) is a very high memory cosumption.</p>
  
  <p>The target is to get the differences in another file.</p>
  
  <p>The lines may appear in diffent order, and maybe missed also.</p>
  
  <p>Any suggetions?</p>