From 22d4efbed1ff7e6c9f5d53bfca245ed5bc4ef2b0 Mon Sep 17 00:00:00 2001
From: Pawel Kozlowski <pkozlowski.opensource@gmail.com>
Date: Thu, 10 Oct 2019 16:00:25 +0200
Subject: [PATCH] perf(ivy): introduce micro-benchmark for directive
 instantiation (#33082)

PR Close #33082
---
 packages/core/test/render3/perf/BUILD.bazel   |   8 ++
 .../perf/directive_instantiate/index.ts       | 100 ++++++++++++++++++
 2 files changed, 108 insertions(+)
 create mode 100644 packages/core/test/render3/perf/directive_instantiate/index.ts

diff --git a/packages/core/test/render3/perf/BUILD.bazel b/packages/core/test/render3/perf/BUILD.bazel
index 06e603af44..f1082aad85 100644
--- a/packages/core/test/render3/perf/BUILD.bazel
+++ b/packages/core/test/render3/perf/BUILD.bazel
@@ -13,6 +13,14 @@ ts_library(
     ],
 )
 
+ng_rollup_bundle(
+    name = "directive_instantiate",
+    entry_point = ":directive_instantiate/index.ts",
+    deps = [
+        ":perf_lib",
+    ],
+)
+
 ng_rollup_bundle(
     name = "element_text_create",
     entry_point = ":element_text_create/index.ts",
diff --git a/packages/core/test/render3/perf/directive_instantiate/index.ts b/packages/core/test/render3/perf/directive_instantiate/index.ts
new file mode 100644
index 0000000000..5e322d62d4
--- /dev/null
+++ b/packages/core/test/render3/perf/directive_instantiate/index.ts
@@ -0,0 +1,100 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import {ɵɵdefineDirective, ɵɵelementEnd, ɵɵelementStart, ɵɵtext} from '../../../../src/render3/index';
+import {createTNode, createTView} from '../../../../src/render3/instructions/shared';
+import {RenderFlags} from '../../../../src/render3/interfaces/definition';
+import {TNodeType, TViewNode} from '../../../../src/render3/interfaces/node';
+import {resetComponentState} from '../../../../src/render3/state';
+import {createBenchmark} from '../micro_bench';
+import {createAndRenderLView} from '../setup';
+
+class Tooltip {
+  tooltip?: string;
+  position?: string;
+  static ngFactoryDef = () => new Tooltip();
+  static ngDirectiveDef = ɵɵdefineDirective({
+    type: Tooltip,
+    selectors: [['', 'tooltip', '']],
+    inputs: {tooltip: 'tooltip', position: 'position'}
+  });
+}
+
+`<div>
+    <button [tooltip]="'Great tip'" position="top">0</button>
+    <button [tooltip]="'Great tip'" position="top">1</button>
+    <button [tooltip]="'Great tip'" position="top">2</button>
+    <button [tooltip]="'Great tip'" position="top">3</button>
+    <button [tooltip]="'Great tip'" position="top">4</button>
+    <button [tooltip]="'Great tip'" position="top">5</button>
+    <button [tooltip]="'Great tip'" position="top">6</button>
+    <button [tooltip]="'Great tip'" position="top">7</button>
+    <button [tooltip]="'Great tip'" position="top">8</button>
+    <button [tooltip]="'Great tip'" position="top">9</button>
+  </div>`;
+function testTemplate(rf: RenderFlags, ctx: any) {
+  if (rf & 1) {
+    ɵɵelementStart(0, 'div');
+    ɵɵelementStart(1, 'button', 0);
+    ɵɵtext(2, '0');
+    ɵɵelementEnd();
+    ɵɵelementStart(3, 'button', 0);
+    ɵɵtext(4, '1');
+    ɵɵelementEnd();
+    ɵɵelementStart(5, 'button', 0);
+    ɵɵtext(6, '2');
+    ɵɵelementEnd();
+    ɵɵelementStart(7, 'button', 0);
+    ɵɵtext(8, '3');
+    ɵɵelementEnd();
+    ɵɵelementStart(9, 'button', 0);
+    ɵɵtext(10, '4');
+    ɵɵelementEnd();
+    ɵɵelementStart(11, 'button', 0);
+    ɵɵtext(12, '5');
+    ɵɵelementEnd();
+    ɵɵelementStart(13, 'button', 0);
+    ɵɵtext(14, '6');
+    ɵɵelementEnd();
+    ɵɵelementStart(15, 'button', 0);
+    ɵɵtext(16, '7');
+    ɵɵelementEnd();
+    ɵɵelementStart(17, 'button', 0);
+    ɵɵtext(18, '8');
+    ɵɵelementEnd();
+    ɵɵelementStart(19, 'button', 0);
+    ɵɵtext(20, '9');
+    ɵɵelementEnd();
+    ɵɵelementEnd();
+  }
+}
+
+const viewTNode = createTNode(null !, null, TNodeType.View, -1, null, null) as TViewNode;
+const embeddedTView = createTView(
+    -1, testTemplate, 21, 10, [Tooltip.ngDirectiveDef], null, null, null,
+    [['position', 'top', 3, 'tooltip']]);
+
+// initialize global state
+resetComponentState();
+
+// create view once so we don't profile first template pass
+createAndRenderLView(null, embeddedTView, viewTNode);
+
+// scenario to benchmark
+const directiveInstantiate = createBenchmark('directive instantiate');
+const createTime = directiveInstantiate('create');
+
+console.profile('directive_instantiate');
+while (createTime()) {
+  for (let i = 0; i < 50000; i++) {
+    createAndRenderLView(null, embeddedTView, viewTNode);
+  }
+}
+console.profileEnd();
+
+// report results
+directiveInstantiate.report();