removed redundant metric support check (and print when it isn't)

activesupport/lib/active_support/testing/performance.rb

@@ -90,6 +90,8 @@ module ActiveSupport
               if klass = Metrics[metric_name.to_sym]
                 run_profile(klass.new)
                 result.add_run
+              else
+                puts '%20s: unsupported' % metric_name
               end
             end
           end
@@ -256,9 +258,7 @@ module ActiveSupport
             @name ||= self.class.name.demodulize.underscore
           end
 
-          def benchmark
-            @unsureturn if measure.nil?
-            
+          def benchmark            
             with_gc_stats do
               before = measure
               yield

activesupport/lib/active_support/testing/performance/rubinius.rb

@@ -84,19 +84,19 @@ module ActiveSupport
           end
         end
 
-        class Memory < DigitalInformationUnit          
+        class Memory < DigitalInformationUnit
           def measure
             loopback.get("system.memory.counter.bytes").last
           end
         end
 
-        class Objects < Amount          
+        class Objects < Amount
           def measure
             loopback.get("system.memory.counter.objects").last
           end
         end
 
-        class GcRuns < Amount          
+        class GcRuns < Amount
           def measure
             loopback.get("system.gc.full.count").last + loopback.get("system.gc.young.count").last
           end