diff --git a/ChangeLog b/ChangeLog
index d951fbf4aa..727f736a11 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sat Feb  2 20:06:42 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* lib/benchmark.rb (Benchmark::realtime): make Benchmark#realtime
+	  a bit faster.  a patch from Alexander Dymo <dymo@ukrpost.ua> in
+	  [ruby-core:15337].
+
 Sat Feb  2 17:40:21 2008  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* time.c (time_cmp): Time.<=> no longer supports comparison with
diff --git a/lib/benchmark.rb b/lib/benchmark.rb
index c7c3935131..577d07acbc 100644
--- a/lib/benchmark.rb
+++ b/lib/benchmark.rb
@@ -304,7 +304,10 @@ module Benchmark
   # Returns the elapsed real time used to execute the given block.
   #
   def realtime(&blk) # :yield:
-    Benchmark::measure(&blk).real
+    r0 = Time.now
+    yield
+    r1 = Time.now
+    r1.to_f - r0.to_f
   end