diff --git a/benchmark/core/string/bench_dup.rb b/benchmark/core/string/bench_dup.rb
index c20d87b9e4..e5373a9ece 100644
--- a/benchmark/core/string/bench_dup.rb
+++ b/benchmark/core/string/bench_dup.rb
@@ -12,4 +12,20 @@
     end
   end
 
+  x.report "clone strings" do |times|
+    i = 0
+    while i < times
+      string.clone
+      i += 1
+    end
+  end
+
+  x.report "create new strings" do |times|
+    i = 0
+    while i < times
+      String.new(string)
+      i += 1
+    end
+  end
+
 end