perf(ivy): noop change detection micro-benchmark (#32104)

PR Close #32104

packages/core/test/render3/perf/noop_change_detection/BUILD.bazel

@@ -0,0 +1,21 @@
+package(default_visibility = ["//visibility:private"])
+
+load("//tools:defaults.bzl", "ts_library", "ng_rollup_bundle")
+
+ts_library(
+    name = "perf_lib",
+    srcs = glob(
+        ["**/*.ts"],
+    ),
+    deps = [
+        "//packages/core",
+    ],
+)
+
+ng_rollup_bundle(
+    name = "bundle",
+    entry_point = ":index.ts",
+    deps = [
+        ":perf_lib",
+    ],
+)

packages/core/test/render3/perf/noop_change_detection/index.ts

@@ -0,0 +1,44 @@
+import {addToViewTree, createLContainer, createLView, createTView, getOrCreateTNode, refreshView, renderView} from '../../../../src/render3/instructions/shared';
+import {TNodeType} from '../../../../src/render3/interfaces/node';
+import {RComment, Renderer3, RendererFactory3} from '../../../../src/render3/interfaces/renderer';
+import {LViewFlags, TView} from '../../../../src/render3/interfaces/view';
+import {insertView} from '../../../../src/render3/node_manipulation';
+
+class WebWorkerRenderNode {}
+
+const mockRNode = new WebWorkerRenderNode();
+
+// Create a root view
+const rootTView = createTView(-1, null, 1, 0, null, null, null, null);
+const tContainerNode = getOrCreateTNode(rootTView, null, 0, TNodeType.Container, null, null);
+const rootLView = createLView(
+    null, rootTView, {}, LViewFlags.CheckAlways, null, null, {} as RendererFactory3,
+    {} as Renderer3);
+const lContainer =
+    createLContainer(mockRNode as RComment, rootLView, mockRNode as RComment, tContainerNode, true);
+addToViewTree(rootLView, lContainer);
+
+// Create 10 different embedded view types
+const embeddedTView = createTView(-1, function() {}, 0, 0, null, null, null, null);
+
+function createAndInsertEmbeddedView(tView: TView, index: number) {
+  const lView = createLView(
+      rootLView, tView, {}, LViewFlags.CheckAlways, null, null, {} as RendererFactory3,
+      {} as Renderer3);
+  insertView(lView, lContainer, index);
+}
+
+// create 1000 embedded views and add them to the container
+for (let i = 0; i < 1000; i++) {
+  createAndInsertEmbeddedView(embeddedTView, i);
+}
+
+// run in the creation mode to set flags etc.
+renderView(rootLView, rootTView, null);
+
+// run change detection in the update mode
+console.profile('update');
+for (let i = 0; i < 20000; i++) {
+  refreshView(rootLView, rootTView, rootTView.template, null);
+}
+console.profileEnd();