In https://www.code-scope.com, the source code search engine database is in the same $5 droplet that run webserver - We are cheap. It is part of <10MB app which hopefully anyone can download soon. We figured the SSD can do 1-3GBs/second transfer, no point to slow it down with separate process or worst, separate network node.

All the web queries are responded in <<< 1 second - so far....