Ask HN: Node.js question from a non-technical person

I know some people may take issue with my question, but I find it necessary to ask anyway: As a non-technical entrepreneur, how could I best audit my web app to see if a transition from RoR to Node.js makes sense? My web app currently is programmed in RoR and many of the benefits that I have heard about Node/js would be greatly beneficial for the purposes of my site. The web app uses multiple APIs (including Fb, Twitter, and other non-social sites) and needs to analyze and present data quickly for a user. With RoR, I find lag in loading which greatly affects the UX of my site. What is the best process that I could take to determine if a transition to Node is in the best interest of my app's performance? Thanks in advance for any suggestions!