Ruby 2.0.0 installation with RVM and running on heroku. RVM instructions sourced from: https://coderwall.com/p/tptocq A quick comparison of Ruby 2.0.0 performance loading rails can be found at my blog: www.superpumpup.com

Gemfile

source 'https://rubygems.org'
ruby "2.0.0"

gem 'rails',     github: 'rails/rails'
gem 'arel',      github: 'rails/arel'
...

terminal.bash

rvm get head

# For Debian-based systems
apt-get install libyaml-dev

# For Mac with Homebrew
brew install libyaml

rvm pkg install openssl
rvm install 2.0.0 \ 
    --with-openssl-dir=$HOME/.rvm/usr \
    --verify-downloads 1
rvm use 2.0.0

FWIW, rvm get stable got me RVM 1.18.12 with Ruby 2.0.0-p0 support (and rvm install 2.0.0 fetched a pre-built binary!).

Awesome! I figured it wouldn't be long until it would happen... I guess adding this to my desktop will be even easier..

Strange... I HAD to sudo to get the install to work. That's not usually the case.

Note that if you get an error like this:

~/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:917:in `connect': SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (OpenSSL::SSL::SSLError)
from /Users/litch/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:917:in `block in connect'
from /Users/litch/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/timeout.rb:51:in `timeout'
from /Users/litch/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:917:in `connect'
from /Users/litch/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:861:in `do_start'
from /Users/litch/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:856:in `start'

It's probably because you forgot to do that rvm pkg install openssl

And also note that when I did rvm get stable instead of pre, rvm installed openssl version 1.0.1c, which did not work with ruby2. So I had to redo it with the pre'