docs: improve optimization.mangleExports docs

website/docs/en/config/optimization.mdx

@@ -192,23 +192,53 @@ Here we assign the `value` to `value2`. Both `value2` and `value` are accessed w
 ## optimization.mangleExports
 
 <PropertyType
-  type="boolean | 'deterministic' | 'size' "
+  type="boolean | 'deterministic' | 'size'"
   defaultValueList={[
-    { defaultValue: 'deterministic', mode: 'production' },
+    { defaultValue: 'true', mode: 'production' },
     { defaultValue: 'false', mode: 'development' },
   ]}
 />
 
-`optimization.mangleExports` allows to control export mangling.
+`optimization.mangleExports` controls how export names are mangled.
 
 The following values are supported:
 
-| option          | description                                                                                                                        |
-| --------------- | ---------------------------------------------------------------------------------------------------------------------------------- |
-| 'named'         | Use meaningful, easy-to-debug content as id. This option is enabled by default in development mode                                 |
-| 'deterministic' | Use the hashed module identifier as the id to benefit from long-term caching. This option is enabled by default in production mode |
-| true            | Same as 'deterministic'                                                                                                            |
-| false           | Keep original name. Good for readability and debugging.                                                                            |
+| option            | description                                                                                                    |
+| ----------------- | -------------------------------------------------------------------------------------------------------------- |
+| `'size'`          | Use the shortest possible export names to reduce bundle size.                                                  |
+| `'deterministic'` | Use short and stable export names for better long-term cache stability. Enabled by default in production mode. |
+| `true`            | Same as `'deterministic'`.                                                                                     |
+| `false`           | Disable export mangling and keep original export names. Enabled by default in development mode.                |
+
+For example, with the following source code:
+
+```js title="src/math.js"
+export const veryLongExportName = 1;
+```
+
+When `mangleExports` is disabled, the export name is preserved:
+
+```js title="dist/main.js"
+__webpack_require__.d(__webpack_exports__, {
+  veryLongExportName: () => veryLongExportName,
+});
+```
+
+When `mangleExports` is set to `'size'`, the export name is shortened:
+
+```js title="rspack.config.mjs"
+export default {
+  optimization: {
+    mangleExports: 'size',
+  },
+};
+```
+
+```js title="dist/main.js"
+__webpack_require__.d(__webpack_exports__, {
+  a: () => veryLongExportName,
+});
+```
 
 ## optimization.mergeDuplicateChunks
 

website/docs/en/config/performance.mdx

@@ -15,7 +15,7 @@ You can define budget thresholds with `maxAssetSize` and `maxEntrypointSize`, an
 
 <PropertyType type="false | object" />
 
-Set `performance` to `false` to disable the performance hint:
+Set `performance` to `false` to disable the performance hints:
 
 ```js title="rspack.config.mjs"
 export default {
@@ -85,7 +85,7 @@ export default {
 
 <PropertyType type="number" defaultValueList={[{ defaultValue: '250000' }]} />
 
-Sets the total size threshold for an entrypoint (in bytes). Entrypoint size means the total size needed for the initial load of that entry. Rspack emits a performance hint when the entrypoint total size exceeds this value.
+Sets the total size threshold for an entrypoint (in bytes). Entrypoint total size means the total size needed for the initial load of that entry. Rspack emits a performance hint when the entrypoint total size exceeds this value.
 
 For example, set the entrypoint size threshold to 500 KB:
 

website/docs/zh/config/optimization.mdx

@@ -192,23 +192,53 @@ function f2() {
 ## optimization.mangleExports
 
 <PropertyType
-  type="boolean | 'deterministic' | 'size' "
+  type="boolean | 'deterministic' | 'size'"
   defaultValueList={[
-    { defaultValue: 'deterministic', mode: 'production' },
+    { defaultValue: 'true', mode: 'production' },
     { defaultValue: 'false', mode: 'development' },
   ]}
 />
 
-`optimization.mangleExports` 允许控制导出名称的混淆。
+`optimization.mangleExports` 用于控制导出名的混淆方式。
 
 支持以下选项：
 
-| option          | description                                                                        |
-| --------------- | ---------------------------------------------------------------------------------- |
-| 'named'         | 使用有意义且易于调试的内容作为标识符。在开发模式下，默认启用此选项。               |
-| 'deterministic' | 使用哈希模块标识符作为标识符，以便从长期缓存中受益。在生产模式下，默认启用此选项。 |
-| true            | 与 'deterministic' 相同。                                                          |
-| false           | 保留原始名称。适用于可读性和调试。                                                 |
+| option            | description                                                                |
+| ----------------- | -------------------------------------------------------------------------- |
+| `'size'`          | 使用尽可能短的导出名，以减小产物体积。                                     |
+| `'deterministic'` | 使用短且稳定的导出名，以获得更好的长期缓存稳定性。生产模式默认启用该选项。 |
+| `true`            | 与 `'deterministic'` 相同。                                                |
+| `false`           | 关闭导出名混淆，保留原始导出名。开发模式默认启用该选项。                   |
+
+例如源代码为：
+
+```js title="src/math.js"
+export const veryLongExportName = 1;
+```
+
+关闭 `mangleExports` 时，导出名会被保留：
+
+```js title="dist/main.js"
+__webpack_require__.d(__webpack_exports__, {
+  veryLongExportName: () => veryLongExportName,
+});
+```
+
+将 `mangleExports` 设置为 `'size'` 时，导出名会被缩短：
+
+```js title="rspack.config.mjs"
+export default {
+  optimization: {
+    mangleExports: 'size',
+  },
+};
+```
+
+```js title="dist/main.js"
+__webpack_require__.d(__webpack_exports__, {
+  a: () => veryLongExportName,
+});
+```
 
 ## optimization.mergeDuplicateChunks
 

website/docs/zh/config/performance.mdx

@@ -85,9 +85,9 @@ export default {
 
 <PropertyType type="number" defaultValueList={[{ defaultValue: '250000' }]} />
 
-设置入口总体积阈值（单位：bytes）。入口体积指首屏加载该入口时需要的总体积。当入口总体积超过该值时，Rspack 会触发性能提示。
+设置入口总体积阈值（单位：bytes）。这里的入口总体积指初始加载该入口时需要的所有资源总体积，当入口总体积超过该值时，Rspack 会触发性能提示。
 
-例如设置入口体积阈值为 500 KB：
+例如设置入口总体积阈值为 500 KB：
 
 ```js title="rspack.config.mjs"
 export default {