Protobuf: Add basic deserialize benchmark

Change-Id: I382269cd59c4f96f3f8e1956b8a1a97836e5b057
Reviewed-by:  Alexey Edelev <alexey.edelev@qt.io>

tests/benchmarks/CMakeLists.txt

@@ -0,0 +1,4 @@
+# Copyright (C) 2024 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+add_subdirectory(protobuf)

tests/benchmarks/protobuf/CMakeLists.txt

@@ -0,0 +1,4 @@
+# Copyright (C) 2024 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+add_subdirectory(deserialize)

tests/benchmarks/protobuf/deserialize/CMakeLists.txt

@@ -0,0 +1,18 @@
+# Copyright (C) 2024 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+qt_internal_add_benchmark(tst_bench_deserialize_protobuf
+    SOURCES
+        tst_bench_deserialize_protobuf.cpp
+    INCLUDE_DIRECTORIES
+        .
+    LIBRARIES
+        Qt::Test
+        Qt::Protobuf
+)
+
+qt6_add_protobuf(tst_bench_deserialize_protobuf
+    PROTO_FILES
+        data/bench.proto
+    OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/qt_protobuf_generated"
+)

tests/benchmarks/protobuf/deserialize/data/bench.proto

@@ -0,0 +1,21 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+syntax = "proto3";
+
+package qtbench;
+
+message EmptyMessage {}
+
+message SimpleBoolMessage {
+    bool testFieldBool = 1;
+}
+
+message SimpleBytesMessage {
+    bytes testFieldBytes = 1;
+}
+
+message RecursiveMessage {
+    int32 testFieldInt = 1;
+    RecursiveMessage testFieldRecursive = 2;
+}

tests/benchmarks/protobuf/deserialize/tst_bench_deserialize_protobuf.cpp

@@ -0,0 +1,49 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include <QtTest/qtest.h>
+
+#include <QtProtobuf/qprotobufserializer.h>
+
+#include "bench.qpb.h"
+
+class tst_ProtoDeserialize : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void deserialize_data();
+    void deserialize();
+};
+
+std::array<std::pair<QString, QByteArray>, 3> data = {
+    std::make_pair("qtbench.SimpleBoolMessage", QByteArray::fromHex("0801")),
+    std::make_pair("qtbench.SimpleBytesMessage", QByteArray::fromHex("0a0c48656c6c6f20776f726c6421")),
+    std::make_pair("qtbench.RecursiveMessage", QByteArray::fromHex("080112120802120e0803120a08041206080512020806")),
+};
+
+void tst_ProtoDeserialize::deserialize_data()
+{
+    QTest::addColumn<QString>("name");
+    QTest::addColumn<QByteArray>("data");
+
+    for (auto &&[name, value] : data)
+        QTest::newRow(qPrintable(name)) << name << value;
+}
+
+void tst_ProtoDeserialize::deserialize()
+{
+    QFETCH(QString, name);
+    QFETCH(QByteArray, data);
+
+    QProtobufSerializer serializer;
+    QBENCHMARK {
+        QProtobufMessagePointer res = QProtobufMessage::constructByName(name);
+        QVERIFY(res);
+        QVERIFY(res->deserialize(&serializer, data));
+    }
+}
+
+QTEST_MAIN(tst_ProtoDeserialize)
+
+#include "tst_bench_deserialize_protobuf.moc"