From bd789a49a774c25ee134d70e1af2caff3b3915ed Mon Sep 17 00:00:00 2001
From: Denis Pushkarev <zloirock@zloirock.ru>
Date: Sat, 9 Jul 2022 08:12:05 +0700
Subject: [PATCH] avoid extra promise creation

https://github.com/tc39/proposal-iterator-helpers/pull/197
---
 packages/core-js/internals/async-iterator-create-proxy.js | 6 ++++--
 packages/core-js/modules/esnext.async-iterator.from.js    | 3 +--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/packages/core-js/internals/async-iterator-create-proxy.js b/packages/core-js/internals/async-iterator-create-proxy.js
index 9e8c973af8d9..cad85f4f782d 100644
--- a/packages/core-js/internals/async-iterator-create-proxy.js
+++ b/packages/core-js/internals/async-iterator-create-proxy.js
@@ -1,5 +1,6 @@
 'use strict';
 var call = require('../internals/function-call');
+var perform = require('../internals/perform');
 var anObject = require('../internals/an-object');
 var create = require('../internals/object-create');
 var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
@@ -32,10 +33,11 @@ module.exports = function (nextHandler, IS_ITERATOR) {
   AsyncIteratorProxy.prototype = defineBuiltIns(create(AsyncIteratorPrototype), {
     next: function next() {
       var that = this;
-      return new Promise(function (resolve) {
+      var result = perform(function () {
         var state = getInternalState(that);
-        resolve(state.done ? { done: true, value: undefined } : anObject(call(nextHandler, state, Promise)));
+        return state.done ? { done: true, value: undefined } : anObject(call(nextHandler, state, Promise));
       });
+      return result.error ? Promise.reject(result.value) : Promise.resolve(result.value);
     },
     'return': function (value) {
       var that = this;
diff --git a/packages/core-js/modules/esnext.async-iterator.from.js b/packages/core-js/modules/esnext.async-iterator.from.js
index 0870fed2db72..c34176747d07 100644
--- a/packages/core-js/modules/esnext.async-iterator.from.js
+++ b/packages/core-js/modules/esnext.async-iterator.from.js
@@ -1,7 +1,6 @@
 // https://github.com/tc39/proposal-iterator-helpers
 var $ = require('../internals/export');
 var call = require('../internals/function-call');
-var anObject = require('../internals/an-object');
 var toObject = require('../internals/to-object');
 var isPrototypeOf = require('../internals/object-is-prototype-of');
 var AsyncIteratorPrototype = require('../internals/async-iterator-prototype');
@@ -17,7 +16,7 @@ var AsyncFromSyncIterator = require('../internals/async-from-sync-iterator');
 var ASYNC_ITERATOR = wellKnownSymbol('asyncIterator');
 
 var AsyncIteratorProxy = createAsyncIteratorProxy(function () {
-  return anObject(call(this.next, this.iterator));
+  return call(this.next, this.iterator);
 }, true);
 
 $({ target: 'AsyncIterator', stat: true, forced: true }, {