Is it feasible to use Ruby 1.9 for Rails yet?

Question

I've read that Ruby 1.9 is a lot faster than 1.8, however it seems like it hasn't become the standard in the Rails community yet. What are the pros and cons of using Ruby 1.9 for new apps?

Edit to say: What I found confusing was that while its not officially recommended, it seems like 2.3 brought compatibility. Just wondering if people have any real world experience of attempting large sites in 1.9.

Also: Any large gotchas to be found in starting an app in 1.8 and upgrading to 1.9 at a later date..

Answer 1

No, it is not recommended yet. From Ruby on Rails: Download:

We recommend Ruby 1.8.7 for use with Rails.

Pros:

The speed and other improvements that come along with a new, faster version.

Cons:

It is unsupported, and as such you will have unpredictable results.

Answer 2

Rails itself runs great, the real problem is with the gems and plugins

You can look at www.isitruby19.com to check what other peoples problems with them are