diff --git a/unmarshal.go b/unmarshal.go
index 3ff0a30..1a90132 100644
--- a/unmarshal.go
+++ b/unmarshal.go
@@ -1,10 +1,10 @@
 package queryparam
 
 import (
-	"reflect"
 	"errors"
-	"net/url"
 	"fmt"
+	"net/url"
+	"reflect"
 	"strings"
 )
 
@@ -28,7 +28,7 @@ func delimiterFromField(field reflect.StructField) string {
 	return defaultDelimiter
 }
 
-func unmarshalField(v reflect.Value, t reflect.Type, i int, u *url.URL) error {
+func unmarshalField(v reflect.Value, t reflect.Type, i int, qs url.Values) error {
 	var (
 		field    reflect.StructField
 		paramVal string
@@ -42,7 +42,7 @@ func unmarshalField(v reflect.Value, t reflect.Type, i int, u *url.URL) error {
 		return nil
 	}
 
-	paramVal = u.Query().Get(tagVal)
+	paramVal = qs.Get(tagVal)
 	if len(paramVal) == 0 {
 		return nil
 	}
@@ -75,8 +75,9 @@ func Unmarshal(u *url.URL, i interface{}) error {
 	v := iVal.Elem()
 	t := v.Type()
 
+	qs := u.Query()
 	for i := 0; i < t.NumField(); i++ {
-		if err := unmarshalField(v, t, i, u); err != nil {
+		if err := unmarshalField(v, t, i, qs); err != nil {
 			return err
 		}
 	}
diff --git a/unmarshal_test.go b/unmarshal_test.go
index 0e251e2..ea8627b 100644
--- a/unmarshal_test.go
+++ b/unmarshal_test.go
@@ -1,12 +1,13 @@
 package queryparam_test
 
 import (
-	"testing"
-	"github.com/tomwright/queryparam"
-	"net/url"
-	"net/http"
 	"fmt"
+	"net/http"
+	"net/url"
 	"reflect"
+	"testing"
+
+	"github.com/tomwright/queryparam"
 )
 
 // ExampleUnmarshal creates a dummy http request and unmarshals the data into a struct
@@ -96,7 +97,7 @@ func TestUnmarshal(t *testing.T) {
 				st.Errorf("unable to unmarshal url: %s", err)
 			}
 
-			if ! reflect.DeepEqual(tc.Data, tc.OutputData) {
+			if !reflect.DeepEqual(tc.Data, tc.OutputData) {
 				st.Errorf("expected `%v`, got `%v`", tc.OutputData, tc.Data)
 			}
 		})
@@ -120,7 +121,7 @@ func TestUnmarshal_BlankDelimiterUsesDefaultDelimiter(t *testing.T) {
 		t.Errorf("unexpected error: %s", err)
 	}
 
-	if exp, got := []string{"Tom", "Jim"}, req.Name; ! reflect.DeepEqual(exp, got) {
+	if exp, got := []string{"Tom", "Jim"}, req.Name; !reflect.DeepEqual(exp, got) {
 		t.Errorf("unexpected result. expected `%v`, got `%v`", exp, got)
 	}
 }
@@ -209,3 +210,22 @@ func TestUnmarshal_InvalidFieldType(t *testing.T) {
 		t.Errorf("unexpected error string. expected `%s`, got `%s`", exp, got)
 	}
 }
+
+func BenchmarkUnmarshal(b *testing.B) {
+
+	u, err := url.Parse("http://localhost:123?name=abcd&namelist=a,b,c&namelistdash=abc&age=12")
+	if err != nil {
+		b.FailNow()
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		data := testData{}
+		err = queryparam.Unmarshal(u, &data)
+		if err != nil {
+			b.FailNow()
+		}
+	}
+	b.StopTimer()
+	b.ReportAllocs()
+}