facebook::react::ConcreteComponentDescriptor<facebook::react::ViewShadowNode>::cloneShadowNode (ConcreteComponentDescriptor.h)

packages/react-native/ReactCommon/react/renderer/core/tests/benchmarks/CloneShadowNodeBenchmark.cpp

@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include <benchmark/benchmark.h>
+#include <react/renderer/components/view/ViewComponentDescriptor.h>
+#include <react/renderer/core/EventDispatcher.h>
+#include <react/renderer/core/ShadowNode.h>
+#include <react/renderer/core/ShadowNodeFragment.h>
+#include <react/utils/ContextContainer.h>
+
+namespace facebook::react {
+
+using ShadowNodeList = std::vector<std::shared_ptr<const ShadowNode>>;
+using SharedShadowNodeList = std::shared_ptr<const ShadowNodeList>;
+
+static auto makeViewComponentDescriptor() {
+  auto contextContainer = std::make_shared<const ContextContainer>();
+  auto eventDispatcher = std::shared_ptr<EventDispatcher>{nullptr};
+  return ViewComponentDescriptor{ComponentDescriptorParameters{
+      .eventDispatcher = eventDispatcher,
+      .contextContainer = contextContainer,
+      .flavor = nullptr}};
+}
+
+static auto createViewShadowNode(
+    ViewComponentDescriptor& descriptor,
+    Tag tag,
+    SurfaceId surfaceId,
+    const ShadowNodeList& children = {}) {
+  auto family = descriptor.createFamily(
+      ShadowNodeFamilyFragment{
+          .tag = tag,
+          .surfaceId = surfaceId,
+          .instanceHandle = nullptr,
+      });
+
+  SharedShadowNodeList childrenPtr = children.empty()
+      ? ShadowNode::emptySharedShadowNodeSharedList()
+      : std::make_shared<const ShadowNodeList>(children);
+
+  return descriptor.createShadowNode(
+      ShadowNodeFragment{
+          .props = ViewShadowNode::defaultSharedProps(),
+          .children = childrenPtr,
+      },
+      family);
+} // NOLINT(clang-analyzer-cplusplus.NewDeleteLeaks)
+
+static void cloneShadowNodeNoChanges(benchmark::State& state) {
+  auto descriptor = makeViewComponentDescriptor();
+  auto node = createViewShadowNode(descriptor, 1, 1);
+
+  for ([[maybe_unused]] auto _ : state) {
+    auto cloned = descriptor.cloneShadowNode(*node, ShadowNodeFragment{});
+    benchmark::DoNotOptimize(cloned);
+  }
+}
+BENCHMARK(cloneShadowNodeNoChanges);
+
+static void cloneShadowNodeWithNewProps(benchmark::State& state) {
+  auto descriptor = makeViewComponentDescriptor();
+  auto node = createViewShadowNode(descriptor, 1, 1);
+  auto newProps = std::make_shared<const ViewShadowNodeProps>();
+
+  for ([[maybe_unused]] auto _ : state) {
+    auto cloned = descriptor.cloneShadowNode(
+        *node,
+        ShadowNodeFragment{
+            .props = newProps,
+        });
+    benchmark::DoNotOptimize(cloned);
+  }
+}
+BENCHMARK(cloneShadowNodeWithNewProps);
+
+static void cloneShadowNodeWithChildren(benchmark::State& state) {
+  auto descriptor = makeViewComponentDescriptor();
+
+  ShadowNodeList children;
+  for (int i = 0; i < 10; ++i) {
+    children.push_back(createViewShadowNode(descriptor, 100 + i, 1));
+  }
+  auto parent = createViewShadowNode(descriptor, 1, 1, children);
+
+  for ([[maybe_unused]] auto _ : state) {
+    auto cloned = descriptor.cloneShadowNode(*parent, ShadowNodeFragment{});
+    benchmark::DoNotOptimize(cloned);
+  }
+}
+BENCHMARK(cloneShadowNodeWithChildren);
+
+static void cloneShadowNodeWithNewChildren(benchmark::State& state) {
+  auto descriptor = makeViewComponentDescriptor();
+
+  ShadowNodeList children;
+  for (int i = 0; i < 10; ++i) {
+    children.push_back(createViewShadowNode(descriptor, 100 + i, 1));
+  }
+  auto parent = createViewShadowNode(descriptor, 1, 1, children);
+
+  ShadowNodeList newChildren;
+  for (int i = 0; i < 10; ++i) {
+    newChildren.push_back(createViewShadowNode(descriptor, 200 + i, 1));
+  }
+  auto newChildrenPtr = std::make_shared<const ShadowNodeList>(newChildren);
+
+  for ([[maybe_unused]] auto _ : state) {
+    auto cloned = descriptor.cloneShadowNode(
+        *parent,
+        ShadowNodeFragment{
+            .children = newChildrenPtr,
+        });
+    benchmark::DoNotOptimize(cloned);
+  }
+}
+BENCHMARK(cloneShadowNodeWithNewChildren);
+
+static void cloneShadowNodeDeepHierarchy(benchmark::State& state) {
+  auto descriptor = makeViewComponentDescriptor();
+
+  std::shared_ptr<ShadowNode> deepest = createViewShadowNode(descriptor, 50, 1);
+  for (int i = 49; i >= 1; --i) {
+    ShadowNodeList singleChild = {deepest};
+    deepest = createViewShadowNode(descriptor, i, 1, singleChild);
+  }
+
+  for ([[maybe_unused]] auto _ : state) {
+    auto cloned = descriptor.cloneShadowNode(*deepest, ShadowNodeFragment{});
+    benchmark::DoNotOptimize(cloned);
+  }
+}
+BENCHMARK(cloneShadowNodeDeepHierarchy);
+
+} // namespace facebook::react
+
+BENCHMARK_MAIN();