diff --git a/src/isomorphic/classic/types/ReactPropTypes.js b/src/isomorphic/classic/types/ReactPropTypes.js
index eab133b350..014a9b3753 100644
--- a/src/isomorphic/classic/types/ReactPropTypes.js
+++ b/src/isomorphic/classic/types/ReactPropTypes.js
@@ -105,6 +105,20 @@ function is(x, y) {
 }
 /*eslint-enable no-self-compare*/
 
+/**
+ * We use an Error-like object for backward compatibility as people may call
+ * PropTypes directly and inspect their output. However we don't use real
+ * Errors anymore. We don't inspect their stack anyway, and creating them
+ * is prohibitively expensive if they are created too often, such as what
+ * happens in oneOfType() for any type before the one that matched.
+ */
+function PropTypeError(message) {
+  this.message = message;
+  this.stack = '';
+}
+// Make `instanceof Error` still work for returned errors.
+PropTypeError.prototype = Error.prototype;
+
 function createChainableTypeChecker(validate) {
   if (__DEV__) {
     var manualPropTypeCallCache = {};
@@ -144,7 +158,7 @@ function createChainableTypeChecker(validate) {
     if (props[propName] == null) {
       var locationName = ReactPropTypeLocationNames[location];
       if (isRequired) {
-        return new Error(
+        return new PropTypeError(
           `Required ${locationName} \`${propFullName}\` was not specified in ` +
           `\`${componentName}\`.`
         );
@@ -185,7 +199,7 @@ function createPrimitiveTypeChecker(expectedType) {
       // 'of type `object`'.
       var preciseType = getPreciseType(propValue);
 
-      return new Error(
+      return new PropTypeError(
         `Invalid ${locationName} \`${propFullName}\` of type ` +
         `\`${preciseType}\` supplied to \`${componentName}\`, expected ` +
         `\`${expectedType}\`.`
@@ -203,7 +217,7 @@ function createAnyTypeChecker() {
 function createArrayOfTypeChecker(typeChecker) {
   function validate(props, propName, componentName, location, propFullName) {
     if (typeof typeChecker !== 'function') {
-      return new Error(
+      return new PropTypeError(
         `Property \`${propFullName}\` of component \`${componentName}\` has invalid PropType notation inside arrayOf.`
       );
     }
@@ -211,7 +225,7 @@ function createArrayOfTypeChecker(typeChecker) {
     if (!Array.isArray(propValue)) {
       var locationName = ReactPropTypeLocationNames[location];
       var propType = getPropType(propValue);
-      return new Error(
+      return new PropTypeError(
         `Invalid ${locationName} \`${propFullName}\` of type ` +
         `\`${propType}\` supplied to \`${componentName}\`, expected an array.`
       );
@@ -240,7 +254,7 @@ function createElementTypeChecker() {
     if (!ReactElement.isValidElement(propValue)) {
       var locationName = ReactPropTypeLocationNames[location];
       var propType = getPropType(propValue);
-      return new Error(
+      return new PropTypeError(
         `Invalid ${locationName} \`${propFullName}\` of type ` +
         `\`${propType}\` supplied to \`${componentName}\`, expected a single ReactElement.`
       );
@@ -256,7 +270,7 @@ function createInstanceTypeChecker(expectedClass) {
       var locationName = ReactPropTypeLocationNames[location];
       var expectedClassName = expectedClass.name || ANONYMOUS;
       var actualClassName = getClassName(props[propName]);
-      return new Error(
+      return new PropTypeError(
         `Invalid ${locationName} \`${propFullName}\` of type ` +
         `\`${actualClassName}\` supplied to \`${componentName}\`, expected ` +
         `instance of \`${expectedClassName}\`.`
@@ -283,7 +297,7 @@ function createEnumTypeChecker(expectedValues) {
 
     var locationName = ReactPropTypeLocationNames[location];
     var valuesString = JSON.stringify(expectedValues);
-    return new Error(
+    return new PropTypeError(
       `Invalid ${locationName} \`${propFullName}\` of value \`${propValue}\` ` +
       `supplied to \`${componentName}\`, expected one of ${valuesString}.`
     );
@@ -294,7 +308,7 @@ function createEnumTypeChecker(expectedValues) {
 function createObjectOfTypeChecker(typeChecker) {
   function validate(props, propName, componentName, location, propFullName) {
     if (typeof typeChecker !== 'function') {
-      return new Error(
+      return new PropTypeError(
         `Property \`${propFullName}\` of component \`${componentName}\` has invalid PropType notation inside objectOf.`
       );
     }
@@ -302,7 +316,7 @@ function createObjectOfTypeChecker(typeChecker) {
     var propType = getPropType(propValue);
     if (propType !== 'object') {
       var locationName = ReactPropTypeLocationNames[location];
-      return new Error(
+      return new PropTypeError(
         `Invalid ${locationName} \`${propFullName}\` of type ` +
         `\`${propType}\` supplied to \`${componentName}\`, expected an object.`
       );
@@ -351,7 +365,7 @@ function createUnionTypeChecker(arrayOfTypeCheckers) {
     }
 
     var locationName = ReactPropTypeLocationNames[location];
-    return new Error(
+    return new PropTypeError(
       `Invalid ${locationName} \`${propFullName}\` supplied to ` +
       `\`${componentName}\`.`
     );
@@ -363,7 +377,7 @@ function createNodeChecker() {
   function validate(props, propName, componentName, location, propFullName) {
     if (!isNode(props[propName])) {
       var locationName = ReactPropTypeLocationNames[location];
-      return new Error(
+      return new PropTypeError(
         `Invalid ${locationName} \`${propFullName}\` supplied to ` +
         `\`${componentName}\`, expected a ReactNode.`
       );
@@ -379,7 +393,7 @@ function createShapeTypeChecker(shapeTypes) {
     var propType = getPropType(propValue);
     if (propType !== 'object') {
       var locationName = ReactPropTypeLocationNames[location];
-      return new Error(
+      return new PropTypeError(
         `Invalid ${locationName} \`${propFullName}\` of type \`${propType}\` ` +
         `supplied to \`${componentName}\`, expected \`object\`.`
       );
diff --git a/src/isomorphic/classic/types/__tests__/ReactPropTypes-test.js b/src/isomorphic/classic/types/__tests__/ReactPropTypes-test.js
index 6f36dc5420..5183aabe52 100644
--- a/src/isomorphic/classic/types/__tests__/ReactPropTypes-test.js
+++ b/src/isomorphic/classic/types/__tests__/ReactPropTypes-test.js
@@ -195,8 +195,6 @@ describe('ReactPropTypes', function() {
       expectWarningInDevelopment(PropTypes.object.isRequired, null);
       expectWarningInDevelopment(PropTypes.object.isRequired, undefined);
     });
-
-
   });
 
   describe('Any type', function() {
@@ -223,7 +221,6 @@ describe('ReactPropTypes', function() {
       expectWarningInDevelopment(PropTypes.any.isRequired, null);
       expectWarningInDevelopment(PropTypes.any.isRequired, undefined);
     });
-
   });
 
   describe('ArrayOf Type', function() {