diff --git a/src/sandbox/index.ts b/src/sandbox/index.ts
index 0387f5e..e5ad1c2 100644
--- a/src/sandbox/index.ts
+++ b/src/sandbox/index.ts
@@ -42,12 +42,14 @@ export function createSandboxContainer(
 ) {
   let sandbox: SandBox;
   if (window.Proxy) {
-    sandbox = useLooseSandbox ? new LegacySandbox(appName, globalContext) : new ProxySandbox(appName, globalContext);
+    sandbox = useLooseSandbox
+      ? new LegacySandbox(appName, globalContext)
+      : new ProxySandbox(appName, globalContext, { speedy: !!speedySandBox });
   } else {
     sandbox = new SnapshotSandbox(appName);
   }
 
-  // some side effect could be be invoked while bootstrapping, such as dynamic stylesheet injection with style-loader, especially during the development phase
+  // some side effect could be invoked while bootstrapping, such as dynamic stylesheet injection with style-loader, especially during the development phase
   const bootstrappingFreers = patchAtBootstrapping(
     appName,
     elementGetter,
diff --git a/src/sandbox/patchers/dynamicAppend/common.ts b/src/sandbox/patchers/dynamicAppend/common.ts
index 333b920..144f0af 100644
--- a/src/sandbox/patchers/dynamicAppend/common.ts
+++ b/src/sandbox/patchers/dynamicAppend/common.ts
@@ -397,7 +397,7 @@ export function patchHTMLDynamicAppendPrototypeFunctions(
   isInvokedByMicroApp: (element: HTMLElement) => boolean,
   containerConfigGetter: (element: HTMLElement) => ContainerConfig,
 ) {
-  // Just overwrite it while it have not been overwrite
+  // Just overwrite it while it have not been overwritten
   if (
     HTMLHeadElement.prototype.appendChild === rawHeadAppendChild &&
     HTMLBodyElement.prototype.appendChild === rawBodyAppendChild &&
@@ -424,7 +424,7 @@ export function patchHTMLDynamicAppendPrototypeFunctions(
     }) as typeof rawHeadInsertBefore;
   }
 
-  // Just overwrite it while it have not been overwrite
+  // Just overwrite it while it have not been overwritten
   if (
     HTMLHeadElement.prototype.removeChild === rawHeadRemoveChild &&
     HTMLBodyElement.prototype.removeChild === rawBodyRemoveChild
diff --git a/src/sandbox/proxySandbox.ts b/src/sandbox/proxySandbox.ts
index 91667eb..b7c86d3 100644
--- a/src/sandbox/proxySandbox.ts
+++ b/src/sandbox/proxySandbox.ts
@@ -80,7 +80,7 @@ const useNativeWindowForBindingsProps = new Map<PropertyKey, boolean>([
   ['mockDomAPIInBlackList', process.env.NODE_ENV === 'test'],
 ]);
 
-function createFakeWindow(globalContext: Window) {
+function createFakeWindow(globalContext: Window, speedy: boolean) {
   // map always has the fastest performance in has check scenario
   // see https://jsperf.com/array-indexof-vs-set-has/23
   const propertiesWithGetter = new Map<PropertyKey, boolean>();
@@ -111,6 +111,8 @@ function createFakeWindow(globalContext: Window) {
           p === 'parent' ||
           p === 'self' ||
           p === 'window' ||
+          // window.document is overwriting in speedy mode
+          (p === 'document' && speedy) ||
           (inTest && (p === mockTop || p === mockSafariTop))
         ) {
           descriptor.configurable = true;
@@ -193,13 +195,14 @@ export default class ProxySandbox implements SandBox {
     {};
   globalContext: typeof window;
 
-  constructor(name: string, globalContext = window) {
+  constructor(name: string, globalContext = window, opts?: { speedy: boolean }) {
     this.name = name;
     this.globalContext = globalContext;
     this.type = SandBoxType.Proxy;
     const { updatedValueSet } = this;
+    const { speedy } = opts || {};
 
-    const { fakeWindow, propertiesWithGetter } = createFakeWindow(globalContext);
+    const { fakeWindow, propertiesWithGetter } = createFakeWindow(globalContext, !!speedy);
 
     const descriptorTargetMap = new Map<PropertyKey, SymbolTarget>();
     const hasOwnProperty = (key: PropertyKey) => fakeWindow.hasOwnProperty(key) || globalContext.hasOwnProperty(key);