title: Most efficient Java primitive collections library
body: <p>What is the best Java primitive collections library? (most memory and time efficient) </p>
  
  <p>I've found Trove and <a href="http://fastutil.di.unimi.it/" rel="noreferrer">FastUtil</a> to be the most used ones, but haven't found much comparison between them (or between others)</p>
  
  <p>Is there any comparison available?</p>