diff --git a/datamodel/low/base/schema.go b/datamodel/low/base/schema.go
index 4460a0b..408e788 100644
--- a/datamodel/low/base/schema.go
+++ b/datamodel/low/base/schema.go
@@ -246,17 +246,15 @@ func (s *Schema) Hash() [32]byte {
 	// hash polymorphic data
 	if len(s.OneOf.Value) > 0 {
 		oneOfKeys := make([]string, len(s.OneOf.Value))
-		oneOfEntities := make(map[string]*Schema)
+		oneOfEntities := make(map[string]*SchemaProxy)
 		z = 0
 		for i := range s.OneOf.Value {
 			g := s.OneOf.Value[i].Value
-			if !g.IsSchemaReference() {
-				k := g.Schema()
-				r := low.GenerateHashString(k)
-				oneOfEntities[r] = k
-				oneOfKeys[z] = r
-				z++
-			}
+			r := low.GenerateHashString(g)
+			oneOfEntities[r] = g
+			oneOfKeys[z] = r
+			z++
+
 		}
 		sort.Strings(oneOfKeys)
 		for k := range oneOfKeys {
@@ -266,17 +264,15 @@ func (s *Schema) Hash() [32]byte {
 
 	if len(s.AllOf.Value) > 0 {
 		allOfKeys := make([]string, len(s.AllOf.Value))
-		allOfEntities := make(map[string]*Schema)
+		allOfEntities := make(map[string]*SchemaProxy)
 		z = 0
 		for i := range s.AllOf.Value {
 			g := s.AllOf.Value[i].Value
-			if !g.IsSchemaReference() {
-				k := g.Schema()
-				r := low.GenerateHashString(k)
-				allOfEntities[r] = k
-				allOfKeys[z] = r
-				z++
-			}
+			r := low.GenerateHashString(g)
+			allOfEntities[r] = g
+			allOfKeys[z] = r
+			z++
+
 		}
 		sort.Strings(allOfKeys)
 		for k := range allOfKeys {
@@ -286,17 +282,15 @@ func (s *Schema) Hash() [32]byte {
 
 	if len(s.AnyOf.Value) > 0 {
 		anyOfKeys := make([]string, len(s.AnyOf.Value))
-		anyOfEntities := make(map[string]*Schema)
+		anyOfEntities := make(map[string]*SchemaProxy)
 		z = 0
 		for i := range s.AnyOf.Value {
 			g := s.AnyOf.Value[i].Value
-			if !g.IsSchemaReference() {
-				k := g.Schema()
-				r := low.GenerateHashString(k)
-				anyOfEntities[r] = k
-				anyOfKeys[z] = r
-				z++
-			}
+			r := low.GenerateHashString(g)
+			anyOfEntities[r] = g
+			anyOfKeys[z] = r
+			z++
+
 		}
 		sort.Strings(anyOfKeys)
 		for k := range anyOfKeys {
@@ -306,17 +300,15 @@ func (s *Schema) Hash() [32]byte {
 
 	if len(s.Not.Value) > 0 {
 		notKeys := make([]string, len(s.Not.Value))
-		notEntities := make(map[string]*Schema)
+		notEntities := make(map[string]*SchemaProxy)
 		z = 0
 		for i := range s.Not.Value {
 			g := s.Not.Value[i].Value
-			if !g.IsSchemaReference() {
-				k := g.Schema()
-				r := low.GenerateHashString(k)
-				notEntities[r] = k
-				notKeys[z] = r
-				z++
-			}
+			r := low.GenerateHashString(g)
+			notEntities[r] = g
+			notKeys[z] = r
+			z++
+
 		}
 		sort.Strings(notKeys)
 		for k := range notKeys {
@@ -326,17 +318,14 @@ func (s *Schema) Hash() [32]byte {
 
 	if len(s.Items.Value) > 0 {
 		itemsKeys := make([]string, len(s.Items.Value))
-		itemsEntities := make(map[string]*Schema)
+		itemsEntities := make(map[string]*SchemaProxy)
 		z = 0
 		for i := range s.Items.Value {
 			g := s.Items.Value[i].Value
-			if !g.IsSchemaReference() {
-				k := g.Schema()
-				r := low.GenerateHashString(k)
-				itemsEntities[r] = k
-				itemsKeys[z] = r
-				z++
-			}
+			r := low.GenerateHashString(g)
+			itemsEntities[r] = g
+			itemsKeys[z] = r
+			z++
 		}
 		sort.Strings(itemsKeys)
 		for k := range itemsKeys {
diff --git a/datamodel/low/v3/header.go b/datamodel/low/v3/header.go
index 34a5fed..1d67647 100644
--- a/datamodel/low/v3/header.go
+++ b/datamodel/low/v3/header.go
@@ -62,7 +62,7 @@ func (h *Header) Hash() [32]byte {
 	f = append(f, fmt.Sprint(h.Explode.Value))
 	f = append(f, fmt.Sprint(h.AllowReserved.Value))
 	if h.Schema.Value != nil {
-		f = append(f, low.GenerateHashString(h.Schema.Value.Schema()))
+		f = append(f, low.GenerateHashString(h.Schema.Value))
 	}
 	if h.Example.Value != nil {
 		f = append(f, fmt.Sprint(h.Example.Value))
diff --git a/datamodel/low/v3/media_type.go b/datamodel/low/v3/media_type.go
index cedcae3..7334261 100644
--- a/datamodel/low/v3/media_type.go
+++ b/datamodel/low/v3/media_type.go
@@ -98,7 +98,7 @@ func (mt *MediaType) Build(root *yaml.Node, idx *index.SpecIndex) error {
 func (mt *MediaType) Hash() [32]byte {
 	var f []string
 	if mt.Schema.Value != nil {
-		f = append(f, low.GenerateHashString(mt.Schema.Value.Schema()))
+		f = append(f, low.GenerateHashString(mt.Schema.Value))
 	}
 	if mt.Example.Value != nil {
 		f = append(f, fmt.Sprintf("%x", sha256.Sum256([]byte(fmt.Sprint(mt.Example.Value)))))
diff --git a/datamodel/low/v3/server.go b/datamodel/low/v3/server.go
index 74776c1..2bffbb1 100644
--- a/datamodel/low/v3/server.go
+++ b/datamodel/low/v3/server.go
@@ -9,6 +9,7 @@ import (
 	"github.com/pb33f/libopenapi/index"
 	"github.com/pb33f/libopenapi/utils"
 	"gopkg.in/yaml.v3"
+	"sort"
 	"strings"
 )
 
@@ -63,9 +64,14 @@ func (s *Server) Build(root *yaml.Node, idx *index.SpecIndex) error {
 // Hash will return a consistent SHA256 Hash of the Server object
 func (s *Server) Hash() [32]byte {
 	var f []string
+	keys := make([]string, len(s.Variables.Value))
+	z := 0
 	for k := range s.Variables.Value {
-		f = append(f, low.GenerateHashString(s.Variables.Value[k].Value))
+		keys[z] = low.GenerateHashString(s.Variables.Value[k].Value)
+		z++
 	}
+	sort.Strings(keys)
+	f = append(f, keys...)
 	if !s.URL.IsEmpty() {
 		f = append(f, s.URL.Value)
 	}
diff --git a/test_specs/burgershop.openapi-modified.yaml b/test_specs/burgershop.openapi-modified.yaml
index fcfdfae..7e03356 100644
--- a/test_specs/burgershop.openapi-modified.yaml
+++ b/test_specs/burgershop.openapi-modified.yaml
@@ -102,7 +102,7 @@ paths:
                 unexpectedError:
                   summary: oh my goodness
                   value:
-                    message: something went terribly wrong my friend, no new burger for you.
+                    message: something went terribly wrong my friend, no new burger for you. mate.
         "422":
           description: Unprocessable entity
           content:
diff --git a/what-changed/model/example.go b/what-changed/model/example.go
index 715e283..58217ea 100644
--- a/what-changed/model/example.go
+++ b/what-changed/model/example.go
@@ -4,8 +4,11 @@
 package model
 
 import (
+	"fmt"
 	"github.com/pb33f/libopenapi/datamodel/low/base"
 	v3 "github.com/pb33f/libopenapi/datamodel/low/v3"
+	"github.com/pb33f/libopenapi/utils"
+	"sort"
 )
 
 // ExampleChanges represent changes to an Example object, part of an OpenAPI specification.
@@ -60,16 +63,56 @@ func CompareExamples(l, r *base.Example) *ExampleChanges {
 	})
 
 	// Value
-	props = append(props, &PropertyCheck{
-		LeftNode:  l.Value.ValueNode,
-		RightNode: r.Value.ValueNode,
-		Label:     v3.ValueLabel,
-		Changes:   &changes,
-		Breaking:  false,
-		Original:  l,
-		New:       r,
-	})
-
+	if utils.IsNodeMap(l.Value.ValueNode) && utils.IsNodeMap(r.Value.ValueNode) {
+		lKeys := make([]string, len(l.Value.ValueNode.Content)/2)
+		rKeys := make([]string, len(r.Value.ValueNode.Content)/2)
+		z := 0
+		for k := range l.Value.ValueNode.Content {
+			if k%2 == 0 {
+				lKeys[z] = fmt.Sprintf("%v-%v", l.Value.ValueNode.Content[k].Value, l.Value.ValueNode.Content[k+1].Value)
+				z++
+			} else {
+				continue
+			}
+		}
+		z = 0
+		for k := range r.Value.ValueNode.Content {
+			if k%2 == 0 {
+				rKeys[z] = fmt.Sprintf("%v-%v", r.Value.ValueNode.Content[k].Value, r.Value.ValueNode.Content[k+1].Value)
+				z++
+			} else {
+				continue
+			}
+		}
+		sort.Strings(lKeys)
+		sort.Strings(rKeys)
+		if (len(lKeys) > len(rKeys)) || (len(rKeys) > len(lKeys)) {
+			CreateChange(&changes, Modified, v3.ValueLabel,
+				l.Value.GetValueNode(), r.Value.GetValueNode(), false, l.Value.GetValue(), r.Value.GetValue())
+		}
+		for k := range lKeys {
+			if lKeys[k] != rKeys[k] {
+				CreateChange(&changes, Modified, v3.ValueLabel,
+					l.Value.GetValueNode(), r.Value.GetValueNode(), false, l.Value.GetValue(), r.Value.GetValue())
+			}
+		}
+		for k := range rKeys {
+			if k >= len(lKeys) {
+				CreateChange(&changes, Modified, v3.ValueLabel,
+					nil, r.Value.GetValueNode(), false, nil, r.Value.GetValue())
+			}
+		}
+	} else {
+		props = append(props, &PropertyCheck{
+			LeftNode:  l.Value.ValueNode,
+			RightNode: r.Value.ValueNode,
+			Label:     v3.ValueLabel,
+			Changes:   &changes,
+			Breaking:  false,
+			Original:  l,
+			New:       r,
+		})
+	}
 	// ExternalValue
 	props = append(props, &PropertyCheck{
 		LeftNode:  l.ExternalValue.ValueNode,
diff --git a/what-changed/model/operation.go b/what-changed/model/operation.go
index 38cf7ce..ad32c4e 100644
--- a/what-changed/model/operation.go
+++ b/what-changed/model/operation.go
@@ -411,6 +411,9 @@ func checkServers(lServers, rServers low.NodeReference[[]low.ValueReference[*v3.
 			nil, rServers.ValueNode, false, nil,
 			rServers.Value)
 	}
+	if len(serverChanges) <= 0 {
+		return nil
+	}
 	return serverChanges
 }
 
diff --git a/what-changed/what_changed_test.go b/what-changed/what_changed_test.go
index 9726507..57bcd2c 100644
--- a/what-changed/what_changed_test.go
+++ b/what-changed/what_changed_test.go
@@ -3,18 +3,41 @@
 
 package what_changed
 
-//func TestCompareOpenAPIDocuments(t *testing.T) {
-//
-//    original, _ := ioutil.ReadFile("../test_specs/burgershop.openapi.yaml")
-//    modified, _ := ioutil.ReadFile("../test_specs/burgershop.openapi-modified.yaml")
-//    infoOrig, _ := datamodel.ExtractSpecInfo(original)
-//    infoMod, _ := datamodel.ExtractSpecInfo(modified)
-//
-//    origDoc, _ := v3.CreateDocument(infoOrig)
-//    modDoc, _ := v3.CreateDocument(infoMod)
-//
-//    changes := CompareOpenAPIDocuments(origDoc, modDoc)
-//
-//    assert.Nil(t, changes)
-//
-//}
+import (
+	"github.com/pb33f/libopenapi/datamodel"
+	v3 "github.com/pb33f/libopenapi/datamodel/low/v3"
+	"github.com/stretchr/testify/assert"
+	"io/ioutil"
+	"testing"
+)
+
+func TestCompareOpenAPIDocuments(t *testing.T) {
+
+	original, _ := ioutil.ReadFile("../test_specs/burgershop.openapi.yaml")
+	modified, _ := ioutil.ReadFile("../test_specs/burgershop.openapi-modified.yaml")
+	infoOrig, _ := datamodel.ExtractSpecInfo(original)
+	infoMod, _ := datamodel.ExtractSpecInfo(modified)
+
+	origDoc, _ := v3.CreateDocument(infoOrig)
+	modDoc, _ := v3.CreateDocument(infoMod)
+
+	changes := CompareOpenAPIDocuments(origDoc, modDoc)
+	assert.Equal(t, 1, changes.TotalChanges())
+	assert.Equal(t, 0, changes.TotalBreakingChanges())
+
+}
+
+func Benchmark_CompareOpenAPIDocuments(b *testing.B) {
+
+	original, _ := ioutil.ReadFile("../test_specs/burgershop.openapi.yaml")
+	modified, _ := ioutil.ReadFile("../test_specs/burgershop.openapi-modified.yaml")
+
+	infoOrig, _ := datamodel.ExtractSpecInfo(original)
+	infoMod, _ := datamodel.ExtractSpecInfo(modified)
+	origDoc, _ := v3.CreateDocument(infoOrig)
+	modDoc, _ := v3.CreateDocument(infoMod)
+
+	for i := 0; i < b.N; i++ {
+		CompareOpenAPIDocuments(origDoc, modDoc)
+	}
+}