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Created August 8, 2021 04:51
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Revisions

  1. @kapral18 kapral18 revised this gist May 13, 2019. 2 changed files with 28 additions and 38 deletions.
    2 changes: 1 addition & 1 deletion index.html
    View file
    Original file line number Diff line number Diff line change
    @@ -2,7 +2,7 @@
    <html>
    <head>
    <meta charset="utf-8"/>
    <title>Native AsyncAwait vs babel regenerator</title>
    <title>Native AsyncAwait vs babel regenerator vs promises</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
    <script src="./suite.js"></script>
    </head>
    64 changes: 27 additions & 37 deletions suite.js
    View file
    Original file line number Diff line number Diff line change
    @@ -10,13 +10,6 @@
    var suite = new Benchmark.Suite;

    Benchmark.prototype.setup = function () {
    /**
    * Copyright (c) 2014-present, Facebook, Inc.
    *
    * This source code is licensed under the MIT license found in the
    * LICENSE file in the root directory of this source tree.
    */

    var runtime = (function (exports) {
    "use strict";

    @@ -737,54 +730,51 @@
    Function("r", "regeneratorRuntime = r")(runtime);
    }

    function x() {
    function regeneratorExample() {
    var res;
    return regeneratorRuntime.async(function x$(_context) {
    while (1) {
    switch (_context.prev = _context.next) {
    case 0:
    return _context.abrupt("return", 1);

    case 1:
    case "end":
    return _context.stop();
    }
    }
    });
    }
    _context.next = 2;
    return regeneratorRuntime.awrap(new Promise(function (resolve) {
    setTimeout(resolve, 0, 1);
    }));

    function y() {
    return regeneratorRuntime.async(function y$(_context2) {
    while (1) {
    switch (_context2.prev = _context2.next) {
    case 0:
    return _context2.abrupt("return", 2);
    case 2:
    res = _context.sent;
    return _context.abrupt("return", res + 1);

    case 1:
    case 4:
    case "end":
    return _context2.stop();
    return _context.stop();
    }
    }
    });
    }

    async function x1 () {
    return 1;
    async function nativeAsyncExample() {
    var res = await new Promise(function(resolve) { setTimeout(resolve, 0, 1); });
    return res + 1;
    }

    async function y1 () {
    return 2;
    }
    var nativePromiseExample = function nativePromiseExample() {
    return new Promise(function(resolve) { setTimeout(resolve, 0, 1); })
    .then(function(x) { return x + 1; });
    };
    };


    suite.add("x();", function () {
    x();
    y();
    suite.add("regeneratorExample();", function () {
    regeneratorExample();
    });

    suite.add("nativeAsyncExample()", function () {
    nativeAsyncExample()
    });

    suite.add("x1();", function () {
    x1();
    y1();
    suite.add("nativePromiseExample()", function () {
    nativePromiseExample()
    });

    suite.on("cycle", function (evt) {
    @@ -803,7 +793,7 @@
    });
    });

    console.log("Native AsyncAwait vs babel regenerator");
    console.log("Native AsyncAwait vs babel regenerator vs promises");
    console.log(new Array(30).join("-"));
    suite.run();
    });
  2. @kapral18 kapral18 created this gist May 13, 2019.
    13 changes: 13 additions & 0 deletions index.html
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,13 @@
    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8"/>
    <title>Native AsyncAwait vs babel regenerator</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
    <script src="./suite.js"></script>
    </head>
    <body>
    <h1>Open the console to view the results</h1>
    <h2><code>cmd + alt + j</code> or <code>ctrl + alt + j</code></h2>
    </body>
    </html>
    809 changes: 809 additions & 0 deletions suite.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,809 @@
    "use strict";

    (function (factory) {
    if (typeof Benchmark !== "undefined") {
    factory(Benchmark);
    } else {
    factory(require("benchmark"));
    }
    })(function (Benchmark) {
    var suite = new Benchmark.Suite;

    Benchmark.prototype.setup = function () {
    /**
    * Copyright (c) 2014-present, Facebook, Inc.
    *
    * This source code is licensed under the MIT license found in the
    * LICENSE file in the root directory of this source tree.
    */

    var runtime = (function (exports) {
    "use strict";

    var Op = Object.prototype;
    var hasOwn = Op.hasOwnProperty;
    var undefined; // More compressible than void 0.
    var $Symbol = typeof Symbol === "function" ? Symbol : {};
    var iteratorSymbol = $Symbol.iterator || "@@iterator";
    var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
    var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";

    function wrap(innerFn, outerFn, self, tryLocsList) {
    // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.
    var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;
    var generator = Object.create(protoGenerator.prototype);
    var context = new Context(tryLocsList || []);

    // The ._invoke method unifies the implementations of the .next,
    // .throw, and .return methods.
    generator._invoke = makeInvokeMethod(innerFn, self, context);

    return generator;
    }
    exports.wrap = wrap;

    // Try/catch helper to minimize deoptimizations. Returns a completion
    // record like context.tryEntries[i].completion. This interface could
    // have been (and was previously) designed to take a closure to be
    // invoked without arguments, but in all the cases we care about we
    // already have an existing method we want to call, so there's no need
    // to create a new function object. We can even get away with assuming
    // the method takes exactly one argument, since that happens to be true
    // in every case, so we don't have to touch the arguments object. The
    // only additional allocation required is the completion record, which
    // has a stable shape and so hopefully should be cheap to allocate.
    function tryCatch(fn, obj, arg) {
    try {
    return { type: "normal", arg: fn.call(obj, arg) };
    } catch (err) {
    return { type: "throw", arg: err };
    }
    }

    var GenStateSuspendedStart = "suspendedStart";
    var GenStateSuspendedYield = "suspendedYield";
    var GenStateExecuting = "executing";
    var GenStateCompleted = "completed";

    // Returning this object from the innerFn has the same effect as
    // breaking out of the dispatch switch statement.
    var ContinueSentinel = {};

    // Dummy constructor functions that we use as the .constructor and
    // .constructor.prototype properties for functions that return Generator
    // objects. For full spec compliance, you may wish to configure your
    // minifier not to mangle the names of these two functions.
    function Generator() {}
    function GeneratorFunction() {}
    function GeneratorFunctionPrototype() {}

    // This is a polyfill for %IteratorPrototype% for environments that
    // don't natively support it.
    var IteratorPrototype = {};
    IteratorPrototype[iteratorSymbol] = function () {
    return this;
    };

    var getProto = Object.getPrototypeOf;
    var NativeIteratorPrototype = getProto && getProto(getProto(values([])));
    if (NativeIteratorPrototype &&
    NativeIteratorPrototype !== Op &&
    hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
    // This environment has a native %IteratorPrototype%; use it instead
    // of the polyfill.
    IteratorPrototype = NativeIteratorPrototype;
    }

    var Gp = GeneratorFunctionPrototype.prototype =
    Generator.prototype = Object.create(IteratorPrototype);
    GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;
    GeneratorFunctionPrototype.constructor = GeneratorFunction;
    GeneratorFunctionPrototype[toStringTagSymbol] =
    GeneratorFunction.displayName = "GeneratorFunction";

    // Helper for defining the .next, .throw, and .return methods of the
    // Iterator interface in terms of a single ._invoke method.
    function defineIteratorMethods(prototype) {
    ["next", "throw", "return"].forEach(function(method) {
    prototype[method] = function(arg) {
    return this._invoke(method, arg);
    };
    });
    }

    exports.isGeneratorFunction = function(genFun) {
    var ctor = typeof genFun === "function" && genFun.constructor;
    return ctor
    ? ctor === GeneratorFunction ||
    // For the native GeneratorFunction constructor, the best we can
    // do is to check its .name property.
    (ctor.displayName || ctor.name) === "GeneratorFunction"
    : false;
    };

    exports.mark = function(genFun) {
    if (Object.setPrototypeOf) {
    Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
    } else {
    genFun.__proto__ = GeneratorFunctionPrototype;
    if (!(toStringTagSymbol in genFun)) {
    genFun[toStringTagSymbol] = "GeneratorFunction";
    }
    }
    genFun.prototype = Object.create(Gp);
    return genFun;
    };

    // Within the body of any async function, `await x` is transformed to
    // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test
    // `hasOwn.call(value, "__await")` to determine if the yielded value is
    // meant to be awaited.
    exports.awrap = function(arg) {
    return { __await: arg };
    };

    function AsyncIterator(generator) {
    function invoke(method, arg, resolve, reject) {
    var record = tryCatch(generator[method], generator, arg);
    if (record.type === "throw") {
    reject(record.arg);
    } else {
    var result = record.arg;
    var value = result.value;
    if (value &&
    typeof value === "object" &&
    hasOwn.call(value, "__await")) {
    return Promise.resolve(value.__await).then(function(value) {
    invoke("next", value, resolve, reject);
    }, function(err) {
    invoke("throw", err, resolve, reject);
    });
    }

    return Promise.resolve(value).then(function(unwrapped) {
    // When a yielded Promise is resolved, its final value becomes
    // the .value of the Promise<{value,done}> result for the
    // current iteration.
    result.value = unwrapped;
    resolve(result);
    }, function(error) {
    // If a rejected Promise was yielded, throw the rejection back
    // into the async generator function so it can be handled there.
    return invoke("throw", error, resolve, reject);
    });
    }
    }

    var previousPromise;

    function enqueue(method, arg) {
    function callInvokeWithMethodAndArg() {
    return new Promise(function(resolve, reject) {
    invoke(method, arg, resolve, reject);
    });
    }

    return previousPromise =
    // If enqueue has been called before, then we want to wait until
    // all previous Promises have been resolved before calling invoke,
    // so that results are always delivered in the correct order. If
    // enqueue has not been called before, then it is important to
    // call invoke immediately, without waiting on a callback to fire,
    // so that the async generator function has the opportunity to do
    // any necessary setup in a predictable way. This predictability
    // is why the Promise constructor synchronously invokes its
    // executor callback, and why async functions synchronously
    // execute code before the first await. Since we implement simple
    // async functions in terms of async generators, it is especially
    // important to get this right, even though it requires care.
    previousPromise ? previousPromise.then(
    callInvokeWithMethodAndArg,
    // Avoid propagating failures to Promises returned by later
    // invocations of the iterator.
    callInvokeWithMethodAndArg
    ) : callInvokeWithMethodAndArg();
    }

    // Define the unified helper method that is used to implement .next,
    // .throw, and .return (see defineIteratorMethods).
    this._invoke = enqueue;
    }

    defineIteratorMethods(AsyncIterator.prototype);
    AsyncIterator.prototype[asyncIteratorSymbol] = function () {
    return this;
    };
    exports.AsyncIterator = AsyncIterator;

    // Note that simple async functions are implemented on top of
    // AsyncIterator objects; they just return a Promise for the value of
    // the final result produced by the iterator.
    exports.async = function(innerFn, outerFn, self, tryLocsList) {
    var iter = new AsyncIterator(
    wrap(innerFn, outerFn, self, tryLocsList)
    );

    return exports.isGeneratorFunction(outerFn)
    ? iter // If outerFn is a generator, return the full iterator.
    : iter.next().then(function(result) {
    return result.done ? result.value : iter.next();
    });
    };

    function makeInvokeMethod(innerFn, self, context) {
    var state = GenStateSuspendedStart;

    return function invoke(method, arg) {
    if (state === GenStateExecuting) {
    throw new Error("Generator is already running");
    }

    if (state === GenStateCompleted) {
    if (method === "throw") {
    throw arg;
    }

    // Be forgiving, per 25.3.3.3.3 of the spec:
    // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume
    return doneResult();
    }

    context.method = method;
    context.arg = arg;

    while (true) {
    var delegate = context.delegate;
    if (delegate) {
    var delegateResult = maybeInvokeDelegate(delegate, context);
    if (delegateResult) {
    if (delegateResult === ContinueSentinel) continue;
    return delegateResult;
    }
    }

    if (context.method === "next") {
    // Setting context._sent for legacy support of Babel's
    // function.sent implementation.
    context.sent = context._sent = context.arg;

    } else if (context.method === "throw") {
    if (state === GenStateSuspendedStart) {
    state = GenStateCompleted;
    throw context.arg;
    }

    context.dispatchException(context.arg);

    } else if (context.method === "return") {
    context.abrupt("return", context.arg);
    }

    state = GenStateExecuting;

    var record = tryCatch(innerFn, self, context);
    if (record.type === "normal") {
    // If an exception is thrown from innerFn, we leave state ===
    // GenStateExecuting and loop back for another invocation.
    state = context.done
    ? GenStateCompleted
    : GenStateSuspendedYield;

    if (record.arg === ContinueSentinel) {
    continue;
    }

    return {
    value: record.arg,
    done: context.done
    };

    } else if (record.type === "throw") {
    state = GenStateCompleted;
    // Dispatch the exception by looping back around to the
    // context.dispatchException(context.arg) call above.
    context.method = "throw";
    context.arg = record.arg;
    }
    }
    };
    }

    // Call delegate.iterator[context.method](context.arg) and handle the
    // result, either by returning a { value, done } result from the
    // delegate iterator, or by modifying context.method and context.arg,
    // setting context.delegate to null, and returning the ContinueSentinel.
    function maybeInvokeDelegate(delegate, context) {
    var method = delegate.iterator[context.method];
    if (method === undefined) {
    // A .throw or .return when the delegate iterator has no .throw
    // method always terminates the yield* loop.
    context.delegate = null;

    if (context.method === "throw") {
    // Note: ["return"] must be used for ES3 parsing compatibility.
    if (delegate.iterator["return"]) {
    // If the delegate iterator has a return method, give it a
    // chance to clean up.
    context.method = "return";
    context.arg = undefined;
    maybeInvokeDelegate(delegate, context);

    if (context.method === "throw") {
    // If maybeInvokeDelegate(context) changed context.method from
    // "return" to "throw", let that override the TypeError below.
    return ContinueSentinel;
    }
    }

    context.method = "throw";
    context.arg = new TypeError(
    "The iterator does not provide a 'throw' method");
    }

    return ContinueSentinel;
    }

    var record = tryCatch(method, delegate.iterator, context.arg);

    if (record.type === "throw") {
    context.method = "throw";
    context.arg = record.arg;
    context.delegate = null;
    return ContinueSentinel;
    }

    var info = record.arg;

    if (! info) {
    context.method = "throw";
    context.arg = new TypeError("iterator result is not an object");
    context.delegate = null;
    return ContinueSentinel;
    }

    if (info.done) {
    // Assign the result of the finished delegate to the temporary
    // variable specified by delegate.resultName (see delegateYield).
    context[delegate.resultName] = info.value;

    // Resume execution at the desired location (see delegateYield).
    context.next = delegate.nextLoc;

    // If context.method was "throw" but the delegate handled the
    // exception, let the outer generator proceed normally. If
    // context.method was "next", forget context.arg since it has been
    // "consumed" by the delegate iterator. If context.method was
    // "return", allow the original .return call to continue in the
    // outer generator.
    if (context.method !== "return") {
    context.method = "next";
    context.arg = undefined;
    }

    } else {
    // Re-yield the result returned by the delegate method.
    return info;
    }

    // The delegate iterator is finished, so forget it and continue with
    // the outer generator.
    context.delegate = null;
    return ContinueSentinel;
    }

    // Define Generator.prototype.{next,throw,return} in terms of the
    // unified ._invoke helper method.
    defineIteratorMethods(Gp);

    Gp[toStringTagSymbol] = "Generator";

    // A Generator should always return itself as the iterator object when the
    // @@iterator function is called on it. Some browsers' implementations of the
    // iterator prototype chain incorrectly implement this, causing the Generator
    // object to not be returned from this call. This ensures that doesn't happen.
    // See https://github.com/facebook/regenerator/issues/274 for more details.
    Gp[iteratorSymbol] = function() {
    return this;
    };

    Gp.toString = function() {
    return "[object Generator]";
    };

    function pushTryEntry(locs) {
    var entry = { tryLoc: locs[0] };

    if (1 in locs) {
    entry.catchLoc = locs[1];
    }

    if (2 in locs) {
    entry.finallyLoc = locs[2];
    entry.afterLoc = locs[3];
    }

    this.tryEntries.push(entry);
    }

    function resetTryEntry(entry) {
    var record = entry.completion || {};
    record.type = "normal";
    delete record.arg;
    entry.completion = record;
    }

    function Context(tryLocsList) {
    // The root entry object (effectively a try statement without a catch
    // or a finally block) gives us a place to store values thrown from
    // locations where there is no enclosing try statement.
    this.tryEntries = [{ tryLoc: "root" }];
    tryLocsList.forEach(pushTryEntry, this);
    this.reset(true);
    }

    exports.keys = function(object) {
    var keys = [];
    for (var key in object) {
    keys.push(key);
    }
    keys.reverse();

    // Rather than returning an object with a next method, we keep
    // things simple and return the next function itself.
    return function next() {
    while (keys.length) {
    var key = keys.pop();
    if (key in object) {
    next.value = key;
    next.done = false;
    return next;
    }
    }

    // To avoid creating an additional object, we just hang the .value
    // and .done properties off the next function object itself. This
    // also ensures that the minifier will not anonymize the function.
    next.done = true;
    return next;
    };
    };

    function values(iterable) {
    if (iterable) {
    var iteratorMethod = iterable[iteratorSymbol];
    if (iteratorMethod) {
    return iteratorMethod.call(iterable);
    }

    if (typeof iterable.next === "function") {
    return iterable;
    }

    if (!isNaN(iterable.length)) {
    var i = -1, next = function next() {
    while (++i < iterable.length) {
    if (hasOwn.call(iterable, i)) {
    next.value = iterable[i];
    next.done = false;
    return next;
    }
    }

    next.value = undefined;
    next.done = true;

    return next;
    };

    return next.next = next;
    }
    }

    // Return an iterator with no values.
    return { next: doneResult };
    }
    exports.values = values;

    function doneResult() {
    return { value: undefined, done: true };
    }

    Context.prototype = {
    constructor: Context,

    reset: function(skipTempReset) {
    this.prev = 0;
    this.next = 0;
    // Resetting context._sent for legacy support of Babel's
    // function.sent implementation.
    this.sent = this._sent = undefined;
    this.done = false;
    this.delegate = null;

    this.method = "next";
    this.arg = undefined;

    this.tryEntries.forEach(resetTryEntry);

    if (!skipTempReset) {
    for (var name in this) {
    // Not sure about the optimal order of these conditions:
    if (name.charAt(0) === "t" &&
    hasOwn.call(this, name) &&
    !isNaN(+name.slice(1))) {
    this[name] = undefined;
    }
    }
    }
    },

    stop: function() {
    this.done = true;

    var rootEntry = this.tryEntries[0];
    var rootRecord = rootEntry.completion;
    if (rootRecord.type === "throw") {
    throw rootRecord.arg;
    }

    return this.rval;
    },

    dispatchException: function(exception) {
    if (this.done) {
    throw exception;
    }

    var context = this;
    function handle(loc, caught) {
    record.type = "throw";
    record.arg = exception;
    context.next = loc;

    if (caught) {
    // If the dispatched exception was caught by a catch block,
    // then let that catch block handle the exception normally.
    context.method = "next";
    context.arg = undefined;
    }

    return !! caught;
    }

    for (var i = this.tryEntries.length - 1; i >= 0; --i) {
    var entry = this.tryEntries[i];
    var record = entry.completion;

    if (entry.tryLoc === "root") {
    // Exception thrown outside of any try block that could handle
    // it, so set the completion value of the entire function to
    // throw the exception.
    return handle("end");
    }

    if (entry.tryLoc <= this.prev) {
    var hasCatch = hasOwn.call(entry, "catchLoc");
    var hasFinally = hasOwn.call(entry, "finallyLoc");

    if (hasCatch && hasFinally) {
    if (this.prev < entry.catchLoc) {
    return handle(entry.catchLoc, true);
    } else if (this.prev < entry.finallyLoc) {
    return handle(entry.finallyLoc);
    }

    } else if (hasCatch) {
    if (this.prev < entry.catchLoc) {
    return handle(entry.catchLoc, true);
    }

    } else if (hasFinally) {
    if (this.prev < entry.finallyLoc) {
    return handle(entry.finallyLoc);
    }

    } else {
    throw new Error("try statement without catch or finally");
    }
    }
    }
    },

    abrupt: function(type, arg) {
    for (var i = this.tryEntries.length - 1; i >= 0; --i) {
    var entry = this.tryEntries[i];
    if (entry.tryLoc <= this.prev &&
    hasOwn.call(entry, "finallyLoc") &&
    this.prev < entry.finallyLoc) {
    var finallyEntry = entry;
    break;
    }
    }

    if (finallyEntry &&
    (type === "break" ||
    type === "continue") &&
    finallyEntry.tryLoc <= arg &&
    arg <= finallyEntry.finallyLoc) {
    // Ignore the finally entry if control is not jumping to a
    // location outside the try/catch block.
    finallyEntry = null;
    }

    var record = finallyEntry ? finallyEntry.completion : {};
    record.type = type;
    record.arg = arg;

    if (finallyEntry) {
    this.method = "next";
    this.next = finallyEntry.finallyLoc;
    return ContinueSentinel;
    }

    return this.complete(record);
    },

    complete: function(record, afterLoc) {
    if (record.type === "throw") {
    throw record.arg;
    }

    if (record.type === "break" ||
    record.type === "continue") {
    this.next = record.arg;
    } else if (record.type === "return") {
    this.rval = this.arg = record.arg;
    this.method = "return";
    this.next = "end";
    } else if (record.type === "normal" && afterLoc) {
    this.next = afterLoc;
    }

    return ContinueSentinel;
    },

    finish: function(finallyLoc) {
    for (var i = this.tryEntries.length - 1; i >= 0; --i) {
    var entry = this.tryEntries[i];
    if (entry.finallyLoc === finallyLoc) {
    this.complete(entry.completion, entry.afterLoc);
    resetTryEntry(entry);
    return ContinueSentinel;
    }
    }
    },

    "catch": function(tryLoc) {
    for (var i = this.tryEntries.length - 1; i >= 0; --i) {
    var entry = this.tryEntries[i];
    if (entry.tryLoc === tryLoc) {
    var record = entry.completion;
    if (record.type === "throw") {
    var thrown = record.arg;
    resetTryEntry(entry);
    }
    return thrown;
    }
    }

    // The context.catch method must only be called with a location
    // argument that corresponds to a known catch block.
    throw new Error("illegal catch attempt");
    },

    delegateYield: function(iterable, resultName, nextLoc) {
    this.delegate = {
    iterator: values(iterable),
    resultName: resultName,
    nextLoc: nextLoc
    };

    if (this.method === "next") {
    // Deliberately forget the last sent value so that we don't
    // accidentally pass it on to the delegate.
    this.arg = undefined;
    }

    return ContinueSentinel;
    }
    };

    // Regardless of whether this script is executing as a CommonJS module
    // or not, return the runtime object so that we can declare the variable
    // regeneratorRuntime in the outer scope, which allows this module to be
    // injected easily by `bin/regenerator --include-runtime script.js`.
    return exports;

    }(
    // If this script is executing as a CommonJS module, use module.exports
    // as the regeneratorRuntime namespace. Otherwise create a new empty
    // object. Either way, the resulting object will be used to initialize
    // the regeneratorRuntime variable at the top of this file.
    typeof module === "object" ? module.exports : {}
    ));

    try {
    regeneratorRuntime = runtime;
    } catch (accidentalStrictMode) {
    // This module should not be running in strict mode, so the above
    // assignment should always work unless something is misconfigured. Just
    // in case runtime.js accidentally runs in strict mode, we can escape
    // strict mode using a global Function call. This could conceivably fail
    // if a Content Security Policy forbids using Function, but in that case
    // the proper solution is to fix the accidental strict mode problem. If
    // you've misconfigured your bundler to force strict mode and applied a
    // CSP to forbid Function, and you're not willing to fix either of those
    // problems, please detail your unique predicament in a GitHub issue.
    Function("r", "regeneratorRuntime = r")(runtime);
    }

    function x() {
    return regeneratorRuntime.async(function x$(_context) {
    while (1) {
    switch (_context.prev = _context.next) {
    case 0:
    return _context.abrupt("return", 1);

    case 1:
    case "end":
    return _context.stop();
    }
    }
    });
    }

    function y() {
    return regeneratorRuntime.async(function y$(_context2) {
    while (1) {
    switch (_context2.prev = _context2.next) {
    case 0:
    return _context2.abrupt("return", 2);

    case 1:
    case "end":
    return _context2.stop();
    }
    }
    });
    }

    async function x1 () {
    return 1;
    }

    async function y1 () {
    return 2;
    }
    };


    suite.add("x();", function () {
    x();
    y();
    });

    suite.add("x1();", function () {
    x1();
    y1();
    });

    suite.on("cycle", function (evt) {
    console.log(" - " + evt.target);
    });

    suite.on("complete", function (evt) {
    console.log(new Array(30).join("-"));

    var results = evt.currentTarget.sort(function (a, b) {
    return b.hz - a.hz;
    });

    results.forEach(function (item) {
    console.log((idx + 1) + ". " + item);
    });
    });

    console.log("Native AsyncAwait vs babel regenerator");
    console.log(new Array(30).join("-"));
    suite.run();
    });