diff --git a/spec/performance_tests/add_collection_to_collection_spec.rb b/spec/performance_tests/add_collection_to_collection_spec.rb
new file mode 100644
index 00000000..6aa0c119
--- /dev/null
+++ b/spec/performance_tests/add_collection_to_collection_spec.rb
@@ -0,0 +1,50 @@
+require 'spec_helper'
+
+describe 'add collection to collection' do
+
+  describe 'time for each approach' do
+    it 'should perform consistently across each approach' do
+      repetitions = 10
+      results = [0,0,0]
+
+      1.upto(repetitions) do |i|
+        parent_collection1 = Hydra::PCDM::Collection.create
+        parent_collection2 = Hydra::PCDM::Collection.create
+        parent_collection3 = Hydra::PCDM::Collection.create
+        child_collection1 = Hydra::PCDM::Collection.create
+        child_collection2 = Hydra::PCDM::Collection.create
+        child_collection3 = Hydra::PCDM::Collection.create
+
+        st = Time.now.to_f
+        parent_collection1.members << child_collection1
+        t = Time.now.to_f - st
+        results[0] += t
+
+        st = Time.now.to_f
+        parent_collection2.child_collections = [child_collection2]
+        t = Time.now.to_f - st
+        results[1] += t
+
+        st = Time.now.to_f
+        Hydra::PCDM::AddCollectionToCollection.call( parent_collection3, child_collection3 )
+        t = Time.now.to_f - st
+        results[2] += t
+      end
+
+      format = "%-20s   %11.8f   %14.8f\n"
+      printf("\n\n")
+
+      puts
+      puts( "============================================" )
+      puts( " Adding one collection to a collection (#{repetitions} repetitions)" )
+      puts( "============================================" )
+      puts( "    add approach       total time (s)   per object time (s)")
+      puts( "--------------------   --------------   -------------------")
+
+      printf( format,"members <<",  results[0], results[0]/repetitions )
+      printf( format,"collections=",results[1], results[1]/repetitions )
+      printf( format,"service call",results[2], results[2]/repetitions )
+
+    end
+  end
+end
diff --git a/spec/performance_tests/add_object_to_collection_spec.rb b/spec/performance_tests/add_object_to_collection_spec.rb
new file mode 100644
index 00000000..d3797056
--- /dev/null
+++ b/spec/performance_tests/add_object_to_collection_spec.rb
@@ -0,0 +1,50 @@
+require 'spec_helper'
+
+describe 'add object to collection' do
+
+  describe 'time for each approach' do
+    it 'should perform consistently across each approach' do
+      repetitions = 10
+      results = [0,0,0]
+
+      1.upto(repetitions) do |i|
+        parent_collection1 = Hydra::PCDM::Collection.create
+        parent_collection2 = Hydra::PCDM::Collection.create
+        parent_collection3 = Hydra::PCDM::Collection.create
+        child_object1 = Hydra::PCDM::Object.create
+        child_object2 = Hydra::PCDM::Object.create
+        child_object3 = Hydra::PCDM::Object.create
+
+        st = Time.now.to_f
+        parent_collection1.members << child_object1
+        t = Time.now.to_f - st
+        results[0] += t
+
+        st = Time.now.to_f
+        parent_collection2.objects = [child_object2]
+        t = Time.now.to_f - st
+        results[1] += t
+
+        st = Time.now.to_f
+        Hydra::PCDM::AddObjectToCollection.call( parent_collection3, child_object3 )
+        t = Time.now.to_f - st
+        results[2] += t
+      end
+
+      format = "%-20s   %11.8f   %14.8f\n"
+      printf("\n\n")
+
+      puts
+      puts( "============================================" )
+      puts( " Adding one object to a collection (#{repetitions} repetitions)" )
+      puts( "============================================" )
+      puts( "    add approach       total time (s)   per object time (s)")
+      puts( "--------------------   --------------   -------------------")
+
+      printf( format,"members <<",  results[0], results[0]/repetitions )
+      printf( format,"objects=",    results[1], results[1]/repetitions )
+      printf( format,"service call",results[2], results[2]/repetitions )
+
+    end
+  end
+end
diff --git a/spec/performance_tests/create_collection_spec.rb b/spec/performance_tests/create_collection_spec.rb
new file mode 100644
index 00000000..3f7c4b85
--- /dev/null
+++ b/spec/performance_tests/create_collection_spec.rb
@@ -0,0 +1,38 @@
+require 'spec_helper'
+
+describe 'create a collection' do
+
+  describe 'time for each approach' do
+    it 'should perform consistently across each approach' do
+      repetitions = 10
+      results = [0,0]
+
+      1.upto(repetitions) do |i|
+
+        st = Time.now.to_f
+        collection1 = Hydra::PCDM::Collection.new
+        t = Time.now.to_f - st
+        results[0] += t
+
+        st = Time.now.to_f
+        collection2 = Hydra::PCDM::Collection.create
+        t = Time.now.to_f - st
+        results[1] += t
+      end
+
+      format = "%-20s   %11.8f   %14.8f\n"
+      printf("\n\n")
+
+      puts
+      puts( "============================================" )
+      puts( " Create 1 collection (#{repetitions} repetitions)" )
+      puts( "============================================" )
+      puts( "    create approach       total time (s)   per object time (s)")
+      puts( "--------------------   --------------   -------------------")
+
+      printf( format,"new",  results[0], results[0]/repetitions )
+      printf( format,"create",results[1], results[1]/repetitions )
+
+    end
+  end
+end
diff --git a/spec/performance_tests/repeat_gets_spec.rb b/spec/performance_tests/repeat_gets_spec.rb
new file mode 100644
index 00000000..d46c5056
--- /dev/null
+++ b/spec/performance_tests/repeat_gets_spec.rb
@@ -0,0 +1,112 @@
+require 'spec_helper'
+
+describe 'repeat_get_related_objects' do
+
+  context 'with large number of related objects files' do
+    # let(:test_counts) { {   10 => Hydra::PCDM::Collection.create } }
+    let(:test_counts) { {   10 => Hydra::PCDM::Collection.create,
+                            50 => Hydra::PCDM::Collection.create,
+                           100 => Hydra::PCDM::Collection.create
+                          # 1000 => Hydra::PCDM::GenericWork.create
+                        } }
+    before do
+      puts( "============================================" )
+      puts( " Creating and appending related objects" )
+      puts( "============================================" )
+      puts( "r_obj count   time (s)   time/r_obj")
+      puts( "-----------   --------   ----------")
+      format = "%8d      %8.3f   %7.3f\n"
+
+      test_counts.each_pair do |related_object_count,collection|
+        st = Time.now.to_f
+        related_object_count.times do
+          Hydra::PCDM::AddRelatedObjectToCollection.call( collection, Hydra::PCDM::Object.create )
+        end
+        t = Time.now.to_f - st
+        printf( format,10,t,t/related_object_count )
+      end
+    end
+
+    describe 'time for each get approach for various counts of related objects in a collection' do
+      xit 'should perform consistently across each approach' do
+        format = "%-20s   %11.8f   %14.12f\n"
+        printf("\n\n")
+
+        test_counts.each_pair do |related_object_count,collection|
+          puts
+          puts( "============================================" )
+          puts( " Getting #{related_object_count} related objects 1 time" )
+          puts( "============================================" )
+          puts( "    get approach         time (s)    time/r_obj (s)")
+          puts( "--------------------   -----------   --------------")
+
+          st = Time.now.to_f
+          collection.related_objects
+          t = Time.now.to_f - st
+          printf( format,".related_objects",t,t/related_object_count )
+
+          st = Time.now.to_f
+          collection.related_objects.to_a
+          t = Time.now.to_f - st
+          printf( format,".related_object.to_a",t,t/related_object_count )
+
+          st = Time.now.to_f
+          Hydra::PCDM::GetRelatedObjectsFromCollection.call( collection )
+          t = Time.now.to_f - st
+          printf( format,"service call",t,t/related_object_count )
+        end
+      end
+    end
+  end
+
+  context 'with large number of gets' do
+    describe 'time for repeatedly getting related objects from the same collection' do
+      let(:related_object_count) { 10 }
+      let(:collection)   { Hydra::PCDM::Collection.create }
+      # let(:repeat_counts)    { [10,50,100,1000] }
+      let(:repeat_counts)    { [10,50,100] }
+      # let(:repeat_counts)    { [10] }
+
+      before do
+        related_object_count.times do
+          Hydra::PCDM::AddRelatedObjectToCollection.call( collection, Hydra::PCDM::Object.create )
+        end
+      end
+
+      xit 'should perform consistently across each get approach' do
+        format = "%-20s   %11.8f   %14.12f\n"
+        printf("\n\n")
+
+        repeat_counts.each do |repeat_count|
+          puts
+          puts( "============================================" )
+          puts( " Getting #{related_object_count} related_objects #{repeat_count} times" )
+          puts( "============================================" )
+          puts( "    get approach         time (s)    time/get (s)")
+          puts( "--------------------   -----------   ------------")
+
+          st = Time.now.to_f
+          repeat_count.times do
+            collection.related_objects
+          end
+          t = Time.now.to_f - st
+          printf( format,".related_objects",t,t/repeat_count )
+
+          st = Time.now.to_f
+          repeat_count.times do
+            collection.related_objects.to_a
+          end
+          t = Time.now.to_f - st
+          printf( format,".related_object.to_a",t,t/repeat_count )
+
+          st = Time.now.to_f
+          repeat_count.times do
+            Hydra::PCDM::GetRelatedObjectsFromCollection.call( collection )
+          end
+          t = Time.now.to_f - st
+          printf( format,"service call",t,t/repeat_count )
+        end
+      end
+    end
+  end
+end