Fix some change detection issues on server reloads

* Fix change detection when .GetPage/site.GetPage is used from shortcode
* Fix stale content for GetPage results with short name lookups on server reloads

Fixes #7623
Fixes #7624
Fixes #7625

identity/identity_test.go

@@ -14,6 +14,9 @@
 package identity
 
 import (
+	"fmt"
+	"math/rand"
+	"strconv"
 	"testing"
 
 	qt "github.com/frankban/quicktest"
@@ -29,6 +32,54 @@ func TestIdentityManager(t *testing.T) {
 	c.Assert(im.Search(testIdentity{name: "notfound"}), qt.Equals, nil)
 }
 
+func BenchmarkIdentityManager(b *testing.B) {
+
+	createIds := func(num int) []Identity {
+		ids := make([]Identity, num)
+		for i := 0; i < num; i++ {
+			ids[i] = testIdentity{name: fmt.Sprintf("id%d", i)}
+		}
+		return ids
+
+	}
+
+	b.Run("Add", func(b *testing.B) {
+		c := qt.New(b)
+		b.StopTimer()
+		ids := createIds(b.N)
+		im := NewManager(testIdentity{"first"})
+		b.StartTimer()
+
+		for i := 0; i < b.N; i++ {
+			im.Add(ids[i])
+		}
+
+		b.StopTimer()
+		c.Assert(im.GetIdentities(), qt.HasLen, b.N+1)
+	})
+
+	b.Run("Search", func(b *testing.B) {
+		c := qt.New(b)
+		b.StopTimer()
+		ids := createIds(b.N)
+		im := NewManager(testIdentity{"first"})
+
+		for i := 0; i < b.N; i++ {
+			im.Add(ids[i])
+		}
+
+		b.StartTimer()
+
+		for i := 0; i < b.N; i++ {
+			name := "id" + strconv.Itoa(rand.Intn(b.N))
+			id := im.Search(testIdentity{name: name})
+			c.Assert(id.GetIdentity().Name(), qt.Equals, name)
+		}
+
+	})
+
+}
+
 type testIdentity struct {
 	name string
 }