title: D3: How to show large dataset
body: <p>I've a large dataset comprises 10^5 data points. And now I'm considering the following question related to large dataset:</p>
  
  <p>Is there any efficient way to visualize very large dataset? In my case I have a user set and each user has 10^3 items. There are 10^5 items in total. I want to show all the items for each user at a time to enable quick comparison between users. Some body suggests using a list, but I don't think a list is the only choice when dealing with this big dataset.</p>
  
  <p><strong>Note</strong></p>
  
  <blockquote>
    <p>I want to show all the items for each user at a time.</p>
  </blockquote>
  
  <p>This means I want to show all the datapoints when click on a user, and when I click on two uses, I can compare the difference between there datapoints.</p>