diff --git a/packages/webpack-uni-mp-loader/lib/plugin/generate-app.js b/packages/webpack-uni-mp-loader/lib/plugin/generate-app.js
index 260c7f7c5ba335e2c5e10b76596bd463c4871501..6fd985c933f9b587cbe3db23e4238aaa1773dd7f 100644
--- a/packages/webpack-uni-mp-loader/lib/plugin/generate-app.js
+++ b/packages/webpack-uni-mp-loader/lib/plugin/generate-app.js
@@ -54,25 +54,24 @@ module.exports = function generateApp (compilation) {
   }
 
   const runtimeJsPath = 'common/runtime.js'
-
+
+  const asset = compilation.assets[runtimeJsPath]
   if ( // app 和 baidu 不需要
     process.env.UNI_PLATFORM !== 'app-plus' &&
     process.env.UNI_PLATFORM !== 'mp-baidu' &&
-    compilation.assets[runtimeJsPath]
-  ) {
+    asset &&
+    !asset.source.__$wrappered
+  ) {
     const source =
       `
   !function(){try{var a=Function("return this")();a&&!a.Math&&(Object.assign(a,{isFinite:isFinite,Array:Array,Date:Date,Error:Error,Function:Function,Math:Math,Object:Object,RegExp:RegExp,String:String,TypeError:TypeError,setTimeout:setTimeout,clearTimeout:clearTimeout,setInterval:setInterval,clearInterval:clearInterval}),"undefined"!=typeof Reflect&&(a.Reflect=Reflect))}catch(a){}}();
-  ${compilation.assets[runtimeJsPath].source()}
-  `
-    compilation.assets[runtimeJsPath] = {
-      size () {
-        return Buffer.byteLength(source, 'utf8')
-      },
-      source () {
-        return source
-      }
-    }
+  ${asset.source()}
+  `
+    const newSource = function () {
+      return source
+    }
+    newSource.__$wrappered = true
+    compilation.assets[runtimeJsPath].source = newSource
   }
 
   const specialMethods = getSpecialMethods()
diff --git a/packages/webpack-uni-mp-loader/lib/plugin/generate-component.js b/packages/webpack-uni-mp-loader/lib/plugin/generate-component.js
index 1f0a18a660b19ed2df773401474ea4e3dbce8621..2e26439c2a3f4eb74d084c03a5155b57fd4b45b0 100644
--- a/packages/webpack-uni-mp-loader/lib/plugin/generate-component.js
+++ b/packages/webpack-uni-mp-loader/lib/plugin/generate-component.js
@@ -12,6 +12,8 @@ const {
   restoreNodeModules
 } = require('../shared')
 
+const EMPTY_COMPONENT_LEN = 'Component({})'.length
+
 const uniPath = normalizePath(require.resolve('@dcloudio/uni-' + process.env.UNI_PLATFORM))
 
 function findModule (modules, resource, altResource) {
@@ -66,6 +68,11 @@ module.exports = function generateComponent (compilation) {
     Object.keys(assets).forEach(name => {
       if (components.has(name.replace('.js', ''))) {
         curComponents.push(name.replace('.js', ''))
+
+        if (assets[name].source.__$wrappered) {
+          return
+        }
+
         const chunkName = name.replace('.js', '-create-component')
 
         let moduleId = ''
@@ -80,7 +87,7 @@ module.exports = function generateComponent (compilation) {
         }
 
         const origSource = assets[name].source()
-        if (origSource.length !== 'Component({})'.length) { // 不是空组件
+        if (origSource.length !== EMPTY_COMPONENT_LEN) { // 不是空组件
           const globalVar = process.env.UNI_PLATFORM === 'mp-alipay' ? 'my' : 'global'
           // 主要是为了解决支付宝旧版本， Component 方法只在组件 js 里有，需要挂在 my.defineComponent
           let beforeCode = ''
@@ -99,14 +106,11 @@ module.exports = function generateComponent (compilation) {
     [['${chunkName}']]
 ]);
 `
-          assets[name] = {
-            size () {
-              return Buffer.byteLength(source, 'utf8')
-            },
-            source () {
-              return source
-            }
+          const newSource = function () {
+            return source
           }
+          newSource.__$wrappered = true
+          assets[name].source = newSource
         }
       }
     })
@@ -118,11 +122,11 @@ module.exports = function generateComponent (compilation) {
           removeUnusedComponent(name) // 组件被移除
         }
       }
-    }
-    for (const name of curComponents) {
-      if (!lastComponents.includes(name)) {
-        addComponent(name) // 新增组件
-      }
+    }
+    for (const name of curComponents) {
+      if (!lastComponents.includes(name)) {
+        addComponent(name) // 新增组件
+      }
     }
     lastComponents = curComponents
   }