[js-perf-test] Add a basic async-await microbenchmark

test/js-perf-test/AsyncAwait/baseline-babel-es2017.js

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+new BenchmarkSuite('BaselineES2017', [1000], [
+  new Benchmark('Basic', false, false, 0, Basic, Setup),
+]);
+
+function _asyncToGenerator(fn) {
+  return function () {
+    var gen = fn.apply(this, arguments);
+    return new Promise(function (resolve, reject) {
+      function step(key, arg) {
+        try {
+          var info = gen[key](arg);
+          var value = info.value;
+        } catch (error) {
+          reject(error);
+          return;
+        }
+        if (info.done) {
+          resolve(value);
+        } else {
+          return Promise.resolve(value)
+              .then(function (value) {
+                step("next", value);
+              }, function (err) {
+                step("throw", err);
+              });
+        }
+      }
+      return step("next");
+    });
+  };
+}
+
+var a, b, c, d, e, f, g, h, i, j, x;
+
+function Setup() {
+  x = Promise.resolve();
+
+  j = (() => {
+    var _ref = _asyncToGenerator(function* () {
+      return x;
+    });
+
+    function j() {
+      return _ref.apply(this, arguments);
+    }
+
+    return j;
+  })();
+  i = (() => {
+    var _ref2 = _asyncToGenerator(function* () {
+      yield j();
+      yield j();
+      yield j();
+      yield j();
+      yield j();
+      yield j();
+      yield j();
+      yield j();
+      yield j();
+      return j();
+    });
+
+    function i() {
+      return _ref2.apply(this, arguments);
+    }
+
+    return i;
+  })();
+  h = (() => {
+    var _ref3 = _asyncToGenerator(function* () {
+      return i();
+    });
+
+    function h() {
+      return _ref3.apply(this, arguments);
+    }
+
+    return h;
+  })();
+  g = (() => {
+    var _ref4 = _asyncToGenerator(function* () {
+      return h();
+    });
+
+    function g() {
+      return _ref4.apply(this, arguments);
+    }
+
+    return g;
+  })();
+  f = (() => {
+    var _ref5 = _asyncToGenerator(function* () {
+      return g();
+    });
+
+    function f() {
+      return _ref5.apply(this, arguments);
+    }
+
+    return f;
+  })();
+  e = (() => {
+    var _ref6 = _asyncToGenerator(function* () {
+      return f();
+    });
+
+    function e() {
+      return _ref6.apply(this, arguments);
+    }
+
+    return e;
+  })();
+  d = (() => {
+    var _ref7 = _asyncToGenerator(function* () {
+      return e();
+    });
+
+    function d() {
+      return _ref7.apply(this, arguments);
+    }
+
+    return d;
+  })();
+  c = (() => {
+    var _ref8 = _asyncToGenerator(function* () {
+      return d();
+    });
+
+    function c() {
+      return _ref8.apply(this, arguments);
+    }
+
+    return c;
+  })();
+  b = (() => {
+    var _ref9 = _asyncToGenerator(function* () {
+      return c();
+    });
+
+    function b() {
+      return _ref9.apply(this, arguments);
+    }
+
+    return b;
+  })();
+  a = (() => {
+    var _ref10 = _asyncToGenerator(function* () {
+      return b();
+    });
+
+    function a() {
+      return _ref10.apply(this, arguments);
+    }
+
+    return a;
+  })();
+
+  %RunMicrotasks();
+}
+
+function Basic() {
+  a();
+  %RunMicrotasks();
+}