多线程编译自适应(4核及以上开启)

lib/prod.js

@@ -3,10 +3,14 @@ import { Worker, parentPort } from 'node:worker_threads'
 import os from 'node:os'
 import fs from 'iofs'
 
+import { compileFiles } from './compile.js'
+import { defaultCustomElement } from './utils.js'
+
 const IS_WIN = process.platform === 'win32'
 const PREFIX = IS_WIN ? 'pages\\' : 'pages/'
-// 线程太多, 效率反而不高
-const THREADS_NUM = os.cpus().length > 4 ? 4 : os.cpus().length - 1
+// 4核(或4线程)以上的CPU, 才开启多线程编译。且线程开销太高, 开太多线程效率反而不高。
+const CPU_CORES = os.cpus().length > 5 ? 6 : os.cpus().length
+const THREADS_NUM = CPU_CORES > 3 ? CPU_CORES - 1 : 0
 const __filename = normalize(import.meta.url.slice(IS_WIN ? 8 : 7))
 const __dirname = dirname(__filename)
 const WORKER_POOL = new Set() // 线程池
@@ -62,21 +66,28 @@ export default function compile(root = '', dist = '', conf = {}, verbose) {
     INJECT_SCSS,
     LEGACY_MODE,
     // 线程通讯无法传递函数类型, 需要转为字符串, 之后再转回来
-    isCustomElement: isCustomElement ? isCustomElement.toString() : null
+    isCustomElement:
+      THREADS_NUM > 0
+        ? isCustomElement
+          ? isCustomElement.toString()
+          : null
+        : isCustomElement || defaultCustomElement
   }
 
   // 创建线程池
-  for (let i = 0; i < THREADS_NUM; i++) {
-    WORKER_POOL.add(
-      new Worker(join(__dirname, './thread.js'), {
-        workerData: {
-          options,
-          verbose,
-          dist,
-          imports: conf.imports
-        }
-      })
-    )
+  if (THREADS_NUM > 0) {
+    for (let i = 0; i < THREADS_NUM; i++) {
+      WORKER_POOL.add(
+        new Worker(join(__dirname, './thread.js'), {
+          workerData: {
+            options,
+            verbose,
+            dist,
+            imports: conf.imports
+          }
+        })
+      )
+    }
   }
 
   fs.ls(SOURCE_DIR, true).forEach(path => {
@@ -141,18 +152,34 @@ export default function compile(root = '', dist = '', conf = {}, verbose) {
         list.delete(path)
         files.set(path, { name, ext })
       })
-      chunk.set(currentPage, { page, files })
-      JOBS_QUEUE.push(chunk)
-      doJob()
+      if (THREADS_NUM > 0) {
+        chunk.set(currentPage, { page, files })
+        JOBS_QUEUE.push(chunk)
+        doJob()
+      } else {
+        console.log(`正在生成 ${currentPage}.html ...`)
+        compileFiles(currentPage, page, files, options, {
+          verbose,
+          dist,
+          imports: conf.imports
+        })
+      }
     }
 
     // 公共依赖
-    {
+    if (THREADS_NUM > 0) {
       let chunk = new Map()
       chunk.set('', { page: null, files: list })
 
       JOBS_QUEUE.push(chunk)
       doJob()
+    } else {
+      console.log('\n正在解析公共依赖 ...')
+      compileFiles('', null, list, options, {
+        verbose,
+        dist,
+        imports: conf.imports
+      })
     }
   } else {
     // 每个线程处理的文件数
@@ -164,15 +191,23 @@ export default function compile(root = '', dist = '', conf = {}, verbose) {
 
     console.log(`正在生成 ${currentPage}.html ...`)
 
-    for (let i = 0; i < THREADS_NUM; i++) {
-      let start = i * chunkSize
-      let end = start + chunkSize
-      let chunk = new Map()
+    if (THREADS_NUM > 0) {
+      for (let i = 0; i < THREADS_NUM; i++) {
+        let start = i * chunkSize
+        let end = start + chunkSize
+        let chunk = new Map()
 
-      chunk.set(currentPage, { page, files: list.slice(start, end) })
+        chunk.set(currentPage, { page, files: list.slice(start, end) })
 
-      JOBS_QUEUE.push(chunk)
-      doJob()
+        JOBS_QUEUE.push(chunk)
+        doJob()
+      }
+    } else {
+      compileFiles(currentPage, page, list, options, {
+        verbose,
+        dist,
+        imports: conf.imports
+      })
     }
   }