As part of a team, we are building an RoR application completely driven through API's. We already have a web app, its just that we now want to make it completely API driven. We initially kicked off with using RABL Templating Engine for generating the JSON Response. We recently observed that by using JSON Builder as an alternative to RABL, our response times increased by about half a second for an API call in our app that users would hit most often . Before we take a final call on deciding to use JSON Builder for all our API's going forward, I just wanted to know about the pros and cons of using RABL and JSON. Also, it would be nice if one could compare the two templating engines mainly keeping performance in mind wherever feasible.
Sharing any relevant links would also be helpful.
Kindly let me know your experiences with the usage of both these templating engines. Thank you.