Simple Fantom benchmark (#54333)

Summary:
Pull Request resolved: #54333

# Changelog: [Internal]

I couldn't add it to the previous diff, since console.createTask is not present on the base revision. See [1].

Reviewed By: sbuggay

Differential Revision: D85860982

fbshipit-source-id: cf78dfc3ba1653a0cd133d924d18a2129cb5b1a4

Author: hoxyq

packages/react-native/src/private/webapis/console/__tests__/consoleCreateTask-benchmark-itest.js

@@ -0,0 +1,35 @@
+/**
+ * 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.
+ *
+ * @flow strict-local
+ * @format
+ * @fantom_mode dev
+ */
+
+/**
+ * We force the DEV mode, because Fusebox infra is not installed in production builds.
+ * We want to benchmark the implementation, not the polyfill.
+ */
+
+import '@react-native/fantom/src/setUpDefaultReactNativeEnvironment';
+
+import * as Fantom from '@react-native/fantom';
+
+const fn = () => {};
+
+Fantom.unstable_benchmark
+  .suite('console.createTask', {
+    minIterations: 50000,
+    disableOptimizedBuildCheck: true,
+  })
+  .test('JavaScript shim', () => {
+    const task: ConsoleTask = {run: cb => cb()};
+    task.run(fn);
+  })
+  .test('implementation', () => {
+    const task = console.createTask('task');
+    task.run(fn);
+  });