Want to build Online Scheduler Web Application, which is better to use GWT or RoR ? and why?

I want to build Online Scheduler Web Applic开发者_运维技巧ation, where user can manage their schedule of their days, which is better to use GWT or RoR ? and why? and the one with fast development time and fast performance is better..

Why not combine GWT and RoR? You can use both, GWT for your frontend and RoR (REST api) for your backend.

It's entirely a matter of personal taste, and whichever you're more comfortable with. Robust, full-featured web applications can be (and are) written in lots of languages.