diff --git a/benchmarks.rb b/benchmarks.rb
index e389555..24de590 100644
--- a/benchmarks.rb
+++ b/benchmarks.rb
@@ -39,11 +39,6 @@ if MODE==:object
     end
 elsif  MODE==:function
     def get(i)
-      test = @cxt['test']
-      unless test
-        $stderr.puts "wtf? #{test.inspect} -> #{@cxt.eval('test')}"
-        $stderr.puts "wff2? #{test.inspect} -> #{@cxt['test']}"
-      end
       @cxt["test"].getObject(i)
     end
 elsif  MODE==:eval
diff --git a/lib/v8/conversion/indentity.rb b/lib/v8/conversion/indentity.rb
index fa469ab..a11cabf 100644
--- a/lib/v8/conversion/indentity.rb
+++ b/lib/v8/conversion/indentity.rb
@@ -11,6 +11,7 @@ class V8::Conversion
     end
 
     def to_v8(ruby_object)
+      return super(ruby_object) if ruby_object.is_a?(String) || ruby_object.is_a?(Primitive)
       rb_idmap[ruby_object.object_id] || super(ruby_object)
     end