docs: add less parallel to build performance guide (#5809)

Author: chenjiahan

packages/plugin-less/src/index.ts

@@ -97,7 +97,7 @@ export type PluginLessOptions = {
   exclude?: Rspack.RuleSetCondition;
   /**
    * Whether to enable parallel loader execution, running `less-loader` in worker
-   * threads. When enabled, this typically improves build performance when processing
+   * threads. When enabled, this typically improves build performance when compiling
    * large numbers of Less modules.
    * @experimental This is an experimental Rspack feature and will not work if your Less
    * options contain functions.

website/docs/en/guide/optimization/build-performance.mdx

@@ -32,6 +32,12 @@ When using Tailwind CSS v3, if the `content` field in `tailwind.config.js` is no
 
 Refer to [Tailwind CSS v3 - Optimize build performance](/guide/styling/tailwindcss-v3#optimize-build-performance) for more details.
 
+### Parallel Less compilation
+
+If your project uses the [@rsbuild/plugin-less](/plugins/list/plugin-less) plugin and contains a large number of Less files, you can try enabling parallel compilation to improve build performance.
+
+Refer to [Less Plugin - parallel](/plugins/list/plugin-less#parallel) for more details.
+
 ### Tool selection
 
 While Rsbuild delivers excellent build performance out of the box, certain JavaScript-based tools can negatively impact overall build performance, particularly in large-scale projects.

website/docs/en/plugins/list/plugin-less.mdx

@@ -126,7 +126,7 @@ pluginLess({
 - **Default:** `false`
 - **Version:** Added in v1.4.0
 
-Whether to enable parallel loader execution, running `less-loader` in worker threads. When enabled, this typically improves build performance when processing large numbers of Less modules.
+Whether to enable parallel loader execution, running `less-loader` in worker threads. When enabled, this typically improves build performance when compiling large numbers of Less modules.
 
 Note that this option is experimental and may not work if your Less options contain functions.
 

website/docs/zh/guide/optimization/build-performance.mdx

@@ -32,6 +32,12 @@ Rsbuild 提供了 [performance.buildCache](/config/performance/build-cache) 配
 
 参考 [Tailwind CSS v3 - 优化构建性能](/guide/styling/tailwindcss-v3#优化构建性能) 了解更多。
 
+### 并行编译 Less 文件
+
+如果你的项目使用了 [@rsbuild/plugin-less](/plugins/list/plugin-less) 插件，且项目中包含大量 Less 文件，可以尝试开启并发编译功能来提升编译性能。
+
+参考 [Less 插件 - parallel](/plugins/list/plugin-less#parallel) 了解更多。
+
 ### 工具选择
 
 尽管 Rsbuild 本身已经提供了优秀的构建性能，但当你使用某些基于 JavaScript 的工具时，可能会对整体构建性能产生负面影响，特别是在大型项目中。

website/docs/zh/plugins/list/plugin-less.mdx

@@ -126,7 +126,7 @@ pluginLess({
 - **默认值：** `false`
 - **版本：** 添加于 v1.4.0
 
-是否开启并行 loader 执行，在 worker 线程中运行 `less-loader`。开启后，在处理大量 Less 模块时通常会有构建性能提升。
+是否开启并行 loader 执行，在 worker 线程中运行 `less-loader`。开启后，在编译大量 Less 模块时通常会有构建性能提升。
 
 注意该选项为实验性功能，当 Less 选项中包含函数时将无法正常工作。