This is a bit off topic, but whenever I'm tempted to add React to a page or incorporate it into my single page app, I keep asking: is it worth roughly doubling the size of my javascript payload (130 kB React + 96 kB jQuery for AJAX + X kB business logic)?

I keep backing off, and sticking with jQuery/Backbone. One solution would be using a lightweight AJAX library in place of jQuery, but I haven't found one that is widely used, well maintained, and recommended. Can anyone recommend one?

Or in 2015 should an extra 130 kB be considered a non-issue?

I've used github/fetch [1] which is a polyfill for the upcoming fetch standard [2]. If you ever want to go beyond this its one of state sources in marty.js [3]

[1] https://github.com/github/fetch [2] https://fetch.spec.whatwg.org/ [3] http://martyjs.org/guides/state-sources/http.html