title: bash tail on a live log file, counting uniq lines with same date/time
body: <p>I'm looking for a good way to tail on a live log file, and display number of lines with the same date/time.</p>
  
  <p>Currently this is working:</p>
  
  <pre><code> tail -F /var/logs/request.log | [cut the date-time] | uniq -c
  </code></pre>
  
  <p>BUT the performance is not good enough. There is a delay of more than one minute, and it output in bulks of few lines each time.</p>
  
  <p>Any idea?</p>