diff --git a/packages/babel-helpers/src/helpers.js b/packages/babel-helpers/src/helpers.js
index b9eef50955..26416c926e 100644
--- a/packages/babel-helpers/src/helpers.js
+++ b/packages/babel-helpers/src/helpers.js
@@ -606,28 +606,45 @@ helpers.interopRequireDefault = helper("7.0.0-beta.0")`
 `;
 
 helpers.interopRequireWildcard = helper("7.0.0-beta.0")`
+  function _getRequireWildcardCache() {
+    if (typeof WeakMap !== "function") return null;
+
+    var cache = new WeakMap();
+    _getRequireWildcardCache = function () { return cache; };
+    return cache;
+  }
+
   export default function _interopRequireWildcard(obj) {
     if (obj && obj.__esModule) {
       return obj;
-    } else {
-      var newObj = {};
-      if (obj != null) {
-        for (var key in obj) {
-          if (Object.prototype.hasOwnProperty.call(obj, key)) {
-            var desc = Object.defineProperty && Object.getOwnPropertyDescriptor
-              ? Object.getOwnPropertyDescriptor(obj, key)
-              : {};
-            if (desc.get || desc.set) {
-              Object.defineProperty(newObj, key, desc);
-            } else {
-              newObj[key] = obj[key];
-            }
+    }
+
+    var cache = _getRequireWildcardCache();
+    if (cache && cache.has(obj)) {
+      return cache.get(obj);
+    }
+
+    var newObj = {};
+    if (obj != null) {
+      var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor;
+      for (var key in obj) {
+        if (Object.prototype.hasOwnProperty.call(obj, key)) {
+          var desc = hasPropertyDescriptor
+            ? Object.getOwnPropertyDescriptor(obj, key)
+            : null;
+          if (desc && (desc.get || desc.set)) {
+            Object.defineProperty(newObj, key, desc);
+          } else {
+            newObj[key] = obj[key];
           }
         }
       }
-      newObj.default = obj;
-      return newObj;
     }
+    newObj.default = obj;
+    if (cache) {
+      cache.set(obj, newObj);
+    }
+    return newObj;
   }
 `;
 
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/output.js
index 71696cd623..90b458ba8d 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/output.js
@@ -9,4 +9,6 @@ var foo = _interopRequireWildcard(require("./moduleWithGetter"));
 
 exports.foo = foo;
 
-function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; if (obj != null) { var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
diff --git a/packages/babel-preset-env/test/fixtures/dynamic-import/auto-esm-unsupported-import-unsupported/output.js b/packages/babel-preset-env/test/fixtures/dynamic-import/auto-esm-unsupported-import-unsupported/output.js
index 9c2292edab..b49aa8ea3b 100644
--- a/packages/babel-preset-env/test/fixtures/dynamic-import/auto-esm-unsupported-import-unsupported/output.js
+++ b/packages/babel-preset-env/test/fixtures/dynamic-import/auto-esm-unsupported-import-unsupported/output.js
@@ -1,6 +1,8 @@
 "use strict";
 
-function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj["default"] = obj; return newObj; } }
+function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; if (obj != null) { var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
 
 Promise.resolve().then(function () {
   return _interopRequireWildcard(require("foo"));
diff --git a/packages/babel-preset-env/test/fixtures/dynamic-import/modules-amd/output.js b/packages/babel-preset-env/test/fixtures/dynamic-import/modules-amd/output.js
index 07297795f6..7932f59244 100644
--- a/packages/babel-preset-env/test/fixtures/dynamic-import/modules-amd/output.js
+++ b/packages/babel-preset-env/test/fixtures/dynamic-import/modules-amd/output.js
@@ -1,5 +1,7 @@
 define(["require"], function (_require) {
-  function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj["default"] = obj; return newObj; } }
+  function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }
+
+  function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; if (obj != null) { var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
 
   new Promise(function (_resolve, _reject) {
     return _require(["foo"], function (imported) {
diff --git a/packages/babel-preset-env/test/fixtures/dynamic-import/modules-cjs/output.js b/packages/babel-preset-env/test/fixtures/dynamic-import/modules-cjs/output.js
index 9c2292edab..b49aa8ea3b 100644
--- a/packages/babel-preset-env/test/fixtures/dynamic-import/modules-cjs/output.js
+++ b/packages/babel-preset-env/test/fixtures/dynamic-import/modules-cjs/output.js
@@ -1,6 +1,8 @@
 "use strict";
 
-function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj["default"] = obj; return newObj; } }
+function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; if (obj != null) { var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
 
 Promise.resolve().then(function () {
   return _interopRequireWildcard(require("foo"));