Profiler not working, What am I doing wrong??

rails_console_output

[22] pry(main)> profile_data = JRuby::Profiler.profile do 
[22] pry(main)*   [*50..1000].collect {|val| val = val + 10}        
[22] pry(main)* end        
=> #<Java::OrgJrubyRuntimeProfile::ProfileData:0x63d8669d>
[23] pry(main)> profile_printer = JRuby::Profiler::GraphProfilePrinter.new(profile_data)      
=> #<Java::OrgJrubyRuntimeProfile::GraphProfilePrinter:0x18755efe>
[24] pry(main)> profile_printer.printProfile(STDOUT)

Total time: 0.00

 %total   %self       total        self    children                 calls  name
---------------------------------------------------------------------------------------------------------
   100%      0%        0.00        0.00        0.00                     1  (top)
                       0.00        0.00        0.00                   1/1  Array#collect
                       0.00        0.00        0.00                   1/1  Range#to_a
---------------------------------------------------------------------------------------------------------
                       0.00        0.00        0.00                   1/1  (top)
    94%     85%        0.00        0.00        0.00                     1  Array#collect
                       0.00        0.00        0.00               951/951  Fixnum#+
---------------------------------------------------------------------------------------------------------
                       0.00        0.00        0.00               951/951  Array#collect
     9%      9%        0.00        0.00        0.00                   951  Fixnum#+
---------------------------------------------------------------------------------------------------------
                       0.00        0.00        0.00                   1/1  (top)
     5%      5%        0.00        0.00        0.00                     1  Range#to_a
=> nil
[25] pry(main)>

server_output

Total time: 0.00

 %total   %self       total        self    children                 calls  name
---------------------------------------------------------------------------------------------------------
   100%    100%        0.00        0.00        0.00                     0  (top)


Started GET "/v1/some" for 127.0.0.1 at 2014-08-28 16:47:56 +0000
  
Processing by V1::SomeController#index as JSON
  Parameters: {"some"=>{}}
  Rendered text template (0.0ms)
Completed 200 OK in 18.0ms (Views: 15.0ms | ActiveRecord: 0.0ms)

some_controller

equire 'jruby/profiler'

module V1
  class SomeController < PublicController
   
    def index
      profile_data = JRuby::Profiler.profile do
        [*50..1000].collect {|val| val = val + 10}
      end

      profile_printer = JRuby::Profiler::GraphProfilePrinter.new(profile_data)
      gff = File.open('graph.txt.' + Time.now.to_s.delete(' '), 'w')
      profile_printer.printProfile(gff)
      render text: profile_printer.printProfile(STDOUT)
    end
  end
end