Add benchmarks for string concatenation.

async_events_nats_test.go

@@ -0,0 +1,47 @@
+/**
+ * Standalone signaling server for the Nextcloud Spreed app.
+ * Copyright (C) 2025 struktur AG
+ *
+ * @author Joachim Bauch <bauch@struktur.de>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package signaling
+
+import (
+	"testing"
+
+	"google.golang.org/protobuf/types/known/timestamppb"
+)
+
+func Benchmark_GetSubjectForSessionId(b *testing.B) {
+	backend := &Backend{
+		id: "compat",
+	}
+	data := &SessionIdData{
+		Sid:       1,
+		Created:   timestamppb.Now(),
+		BackendId: backend.Id(),
+	}
+	codec := NewSessionIdCodec([]byte("12345678901234567890123456789012"), []byte("09876543210987654321098765432109"))
+	sid, err := codec.EncodePublic(data)
+	if err != nil {
+		b.Fatalf("could not create session id: %s", err)
+	}
+	for b.Loop() {
+		GetSubjectForSessionId(sid, backend)
+	}
+}

hub_test.go

@@ -51,6 +51,7 @@ import (
 	"github.com/nats-io/nats-server/v2/server"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"google.golang.org/protobuf/types/known/timestamppb"
 
 	"github.com/strukturag/nextcloud-spreed-signaling/api"
 )
@@ -827,6 +828,64 @@ func performHousekeeping(hub *Hub, now time.Time) *sync.WaitGroup {
 	return &wg
 }
 
+func Benchmark_DecodePrivateSessionId(b *testing.B) {
+	decodeCaches := make([]*LruCache[*SessionIdData], 0, numDecodeCaches)
+	for range numDecodeCaches {
+		decodeCaches = append(decodeCaches, NewLruCache[*SessionIdData](decodeCacheSize))
+	}
+	backend := &Backend{
+		id: "compat",
+	}
+	data := &SessionIdData{
+		Sid:       1,
+		Created:   timestamppb.Now(),
+		BackendId: backend.Id(),
+	}
+	codec := NewSessionIdCodec([]byte("12345678901234567890123456789012"), []byte("09876543210987654321098765432109"))
+	sid, err := codec.EncodePrivate(data)
+	if err != nil {
+		b.Fatalf("could not create session id: %s", err)
+	}
+	hub := &Hub{
+		cookie:       codec,
+		decodeCaches: decodeCaches,
+	}
+	// Decode once to populate cache.
+	hub.decodePrivateSessionId(sid)
+	for b.Loop() {
+		hub.decodePrivateSessionId(sid)
+	}
+}
+
+func Benchmark_DecodePublicSessionId(b *testing.B) {
+	decodeCaches := make([]*LruCache[*SessionIdData], 0, numDecodeCaches)
+	for range numDecodeCaches {
+		decodeCaches = append(decodeCaches, NewLruCache[*SessionIdData](decodeCacheSize))
+	}
+	backend := &Backend{
+		id: "compat",
+	}
+	data := &SessionIdData{
+		Sid:       1,
+		Created:   timestamppb.Now(),
+		BackendId: backend.Id(),
+	}
+	codec := NewSessionIdCodec([]byte("12345678901234567890123456789012"), []byte("09876543210987654321098765432109"))
+	sid, err := codec.EncodePublic(data)
+	if err != nil {
+		b.Fatalf("could not create session id: %s", err)
+	}
+	hub := &Hub{
+		cookie:       codec,
+		decodeCaches: decodeCaches,
+	}
+	// Decode once to populate cache.
+	hub.decodePublicSessionId(sid)
+	for b.Loop() {
+		hub.decodePublicSessionId(sid)
+	}
+}
+
 func TestWebsocketFeatures(t *testing.T) {
 	t.Parallel()
 	require := require.New(t)