Faster RI, with Pry's pager.

pry-ri.rb

Pry.commands.command "ri", "RI it up!" do |*names|
  # lazy loading
  require 'rdoc/ri/driver'

  unless RDoc::RI::Driver.responds_to? :monkeypatched?
    class RDoc::RI::Driver
      def page
        lesspipe {|less| yield less}
      end

      def formatter(io)
        if @formatter_klass then
          @formatter_klass.new
        else
          RDoc::Markup::ToAnsi.new
        end
      end

      def monkeypatched?
        true
      end
    end
  end

  ri = RDoc::RI::Driver.new :use_stdout => true, :interactive => false
  ri.display_names names
end