title: Ruby - more accurate timestamp than Time.now.utc
body: <p>Normally I use <code>Time.now.utc</code> for the timestamp in my project. But this time it looks it's not accurate enough to just use <code>Time.now.utc</code>.</p>
  
  <p>It looks that <code>Time.now.utc</code> is on second level(is it correct?), is not as accurate as I want. </p>
  
  <p>Is there ways to generate timestamp on milliseconds level?</p>