diff --git a/lib/rabl-fast-json/compiler.rb b/lib/rabl-fast-json/compiler.rb
index 5469bbd..4653712 100644
--- a/lib/rabl-fast-json/compiler.rb
+++ b/lib/rabl-fast-json/compiler.rb
@@ -1,7 +1,7 @@
 module RablFastJson
   class Compiler
 
-    def initialize(context = nil, assigns = nil)
+    def initialize(context = nil)
       @context = context
       @glue_count = 0
     end
@@ -50,7 +50,7 @@ module RablFastJson
     end
 
     def extends(path)
-      t = Library.instance.get(path)
+      t = Library.instance.get(path, @context)
       @template.merge!(t.source)
     end
 
@@ -77,7 +77,7 @@ module RablFastJson
     end
 
     def _compile_sub_template(name, data, &block)
-      compiler = Compiler.new(@context, @assigns)
+      compiler = Compiler.new(@context)
       template = compiler.compile_block(&block)
       @template[name] = template.merge!(:_data => data)
     end
diff --git a/lib/rabl-fast-json/library.rb b/lib/rabl-fast-json/library.rb
index ba7e012..aa67ab9 100644
--- a/lib/rabl-fast-json/library.rb
+++ b/lib/rabl-fast-json/library.rb
@@ -11,33 +11,22 @@ module RablFastJson
     def get_rendered_template(source, context)
       path = context.instance_variable_get(:@virtual_path)
       @view_renderer = context.instance_variable_get(:@view_renderer)
-      start = Time.now
+
       compiled_template = get_compiled_template(path, source, context)
-      compiled_time = Time.now
       compiled_template.context = context
-      r = compiled_template.render
-      render_time = Time.now
-      res = ActiveSupport::JSON.encode(r)
-      final_time = Time.now
 
-      Rails.logger.warn "[BENCHMARK] Compilation:\t#{(compiled_time - start) * 1000.0}ms"
-      Rails.logger.warn "[BENCHMARK] Rendering:\t\t#{(render_time - compiled_time) * 1000.0}ms"
-      Rails.logger.warn "[BENCHMARK] JSON encoding:\t#{(final_time - render_time) * 1000.0}ms"
-      Rails.logger.warn "[BENCHMARK] Total:\t\t#{(final_time - start) * 1000.0}ms"
-
-      res
+      ActiveSupport::JSON.encode(compiled_template.render)
     end
 
     def get_compiled_template(path, source, context)
-      #@cached_templates[path] ||=
-      Compiler.new(context).compile_source(source)
+      @cached_templates[path] ||= Compiler.new(context).compile_source(source)
     end
 
-    def get(path)
+    def get(path, context)
       template = @cached_templates[path]
       return template if !template.nil?
       t = @view_renderer.lookup_context.find_template(path, [], false)
-      get_compiled_template(path, t.source, nil)
+      get_compiled_template(path, t.source, context)
     end
   end
 end
\ No newline at end of file
diff --git a/lib/rabl-fast-json/template.rb b/lib/rabl-fast-json/template.rb
index 06e3957..f1de078 100644
--- a/lib/rabl-fast-json/template.rb
+++ b/lib/rabl-fast-json/template.rb
@@ -24,21 +24,24 @@ module RablFastJson
 
       source.inject({}) { |output, current|
         key, value = current
+
         out = case value
         when Symbol
           data.send(value) # attributes
         when Proc
           value.call(data) # node
         when Hash
-          data_symbol = value.delete(:_data)
-          object = data_symbol.to_s.start_with?('@') ? @context.instance_variable_get(data_symbol) : @object.send(data_symbol)
+          current_value = value.dup
+          data_symbol = current_value.delete(:_data)
+          object = data_symbol.nil? ? data : data_symbol.to_s.start_with?('@') ? @context.instance_variable_get(data_symbol) : data.send(data_symbol)
+
           if key.to_s.start_with?('_') # glue
-            value.each_pair { |k, v|
+            current_value.each_pair { |k, v|
               output[k] = object.send(v)
             }
             next output
           else # child
-            object.respond_to?(:each) ? render_collection(object, value) : render_resource(object, value)
+            object.respond_to?(:each) ? render_collection(object, current_value) : render_resource(object, current_value)
           end
         end
         output[key] = out
diff --git a/test/compiler_test.rb b/test/compiler_test.rb
index 17f80d7..7cb0926 100644
--- a/test/compiler_test.rb
+++ b/test/compiler_test.rb
@@ -87,9 +87,9 @@ class CompilerTest < ActiveSupport::TestCase
     assert_equal :users, t.root_name
   end
 
-  test "extends use other template one's active" do
+  test "extends use other template source as itself" do
     template = mock('template', :source => { :id => :id })
-    RablFastJson::Library.stub_chain(:instance, :get).with('users/base').and_return(template)
+    RablFastJson::Library.instance.stub(:get).with('users/base', @context).and_return(template)
     t = @compiler.compile_source(%{ extends 'users/base' })
     assert_equal({ :id => :id }, t.source)
   end
diff --git a/test/deep_nesting_test.rb b/test/deep_nesting_test.rb
new file mode 100644
index 0000000..607ba98
--- /dev/null
+++ b/test/deep_nesting_test.rb
@@ -0,0 +1,61 @@
+require 'test_helper'
+
+class DeepNestingTest < ActiveSupport::TestCase
+
+  class Post
+    attr_accessor :id, :title
+
+    def initialize(id, title)
+      @id, @title = id, title
+    end
+
+    def comments
+      [Struct.new(:id, :content).new(1, 'first'), Struct.new(:id, :content).new(2, 'second')]
+    end
+  end
+
+  setup do
+    RablFastJson::Library.reset_instance
+    @post = Post.new(42, 'I rock !')
+    @user = User.new(1, 'foobar', 'male')
+    @user.stub(:posts).and_return([@post])
+    @user.stub(:respond_to?).with(:each).and_return(false)
+
+    @view_renderer = mock()
+    @view_renderer.stub_chain(:lookup_context, :find_template).with('comments/show', [], false).and_return(
+      mock(:source => %{ object :@comment\n attribute :content }))
+
+    @context = Context.new
+    @context.stub(:instance_variable_get).with(:@user).and_return(@user)
+    @context.stub(:instance_variable_get).with(:@view_renderer).and_return(@view_renderer)
+    @context.stub(:instance_variable_get).with(:@virtual_path).and_return('users/show')
+  end
+
+  test "compile and render deep nesting template" do
+    source = %{
+      object :@user
+      attributes :id, :name
+      child :posts do
+        attribute :title
+        child :comments do
+          extends 'comments/show'
+        end
+      end
+    }
+
+    assert_equal(ActiveSupport::JSON.encode({
+      :id => 1,
+      :name => 'foobar',
+      :posts => [{
+        :title => 'I rock !',
+        :comments => [
+          { :content => 'first' },
+          { :content => 'second' }
+        ]
+      }]
+    }), RablFastJson::Library.instance.get_rendered_template(source, @context))
+  end
+end
+
+
+
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 5e757bf..4d1ad71 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -5,6 +5,21 @@ $:.unshift File.expand_path('../../lib', __FILE__)
 require 'rspec/mocks'
 require 'minitest/autorun'
 require 'active_support/test_case'
+
+require 'singleton'
+class <<Singleton
+  def included_with_reset(klass)
+    included_without_reset(klass)
+    class <<klass
+      def reset_instance
+        Singleton.send :__init__, self
+        self
+      end
+    end
+  end
+  alias_method_chain :included, :reset
+end
+
 require 'rabl-fast-json'
 
 module ActiveSupport