1 files changed, 13 insertions, 6 deletions
diff --git a/activesupport/lib/active_support/core_ext/benchmark.rb b/activesupport/lib/active_support/core_ext/benchmark.rb
index 79ba165e3a..ae57b152e8 100644
--- a/activesupport/lib/active_support/core_ext/benchmark.rb
+++ b/activesupport/lib/active_support/core_ext/benchmark.rb
@@ -1,12 +1,19 @@
 require 'benchmark'
 
 class << Benchmark
-  remove_method :realtime
+  # Earlier Ruby had a slower implementation.
+  if RUBY_VERSION < '1.8.7'
+    remove_method :realtime
 
-  def realtime
-    r0 = Time.now
-    yield
-    r1 = Time.now
-    r1.to_f - r0.to_f
+    def realtime
+      r0 = Time.now
+      yield
+      r1 = Time.now
+      r1.to_f - r0.to_f
+    end
+  end
+
+  def ms
+    1000 * realtime { yield }
   end
 end