diff --git a/actionpack/lib/action_controller/request_profiler.rb b/actionpack/lib/action_controller/request_profiler.rb
index 8a18d194bdd50..a6471d0c08a13 100755
--- a/actionpack/lib/action_controller/request_profiler.rb
+++ b/actionpack/lib/action_controller/request_profiler.rb
@@ -17,13 +17,13 @@ def initialize(script_path)
         reset!
       end
 
-      def benchmark(n)
+      def benchmark(n, profiling = false)
         @quiet = true
         print '  '
 
         result = Benchmark.realtime do
           n.times do |i|
-            run
+            run(profiling)
             print_progress(i)
           end
         end
@@ -43,8 +43,15 @@ def define_run_method(script_path)
           script = File.read(script_path)
 
           source = <<-end_source
-            def run
-              #{script}
+            def run(profiling = false)
+              if profiling
+                RubyProf.resume do
+                  #{script}
+                end
+              else
+                #{script}
+              end
+
               old_request_count = request_count
               reset!
               self.request_count = old_request_count
@@ -91,21 +98,22 @@ def run
     def profile(sandbox)
       load_ruby_prof
 
-      results = RubyProf.profile { benchmark(sandbox) }
+      benchmark(sandbox, true)
+      results = RubyProf.stop
 
       show_profile_results results
       results
     end
 
-    def benchmark(sandbox)
+    def benchmark(sandbox, profiling = false)
       sandbox.request_count = 0
-      elapsed = sandbox.benchmark(options[:n]).to_f
+      elapsed = sandbox.benchmark(options[:n], profiling).to_f
       count = sandbox.request_count.to_i
       puts '%.2f sec, %d requests, %d req/sec' % [elapsed, count, count / elapsed]
     end
 
     def warmup(sandbox)
-      Benchmark.realtime { sandbox.run }
+      Benchmark.realtime { sandbox.run(false) }
     end
 
     def default_options
@@ -136,6 +144,7 @@ def parse_options(args)
     protected
       def load_ruby_prof
         begin
+          gem 'ruby-prof', '>= 0.6.1'
           require 'ruby-prof'
           if mode = options[:measure]
             RubyProf.measure_mode = RubyProf.const_get(mode.upcase)