One way of solving this issue is serving pre-rendered image tiles rather than overlaying each data point separately: <a href="http:&#x2F;&#x2F;blog.cartodb.com&#x2F;the-versatility-of-retreiving-and-rendering-geospatial&#x2F;" rel="nofollow">http:&#x2F;&#x2F;blog.cartodb.com&#x2F;the-versatility-of-retreiving-and-re...</a>