feat: support parallel builds

src/build.ts

@@ -156,6 +156,7 @@ async function _build(
           respectExternal: true,
         },
       },
+      parallel: false,
     },
   ) as BuildOptions;
 
@@ -274,17 +275,27 @@ async function _build(
   //   await symlink(resolve(ctx.rootDir), nodemodulesDir).catch(() => {})
   // }
 
-  // untyped
-  await typesBuild(ctx);
-
-  // mkdist
-  await mkdistBuild(ctx);
-
-  // rollup
-  await rollupBuild(ctx);
-
-  // copy
-  await copyBuild(ctx);
+  const buildTasks = [
+    // untyped
+    (): Promise<void> => typesBuild(ctx),
+    // mkdist
+    (): Promise<void> => mkdistBuild(ctx),
+    // rollup
+    (): Promise<void> => rollupBuild(ctx),
+    // copy
+    (): Promise<void> => copyBuild(ctx),
+  ];
+
+  // Run build tasks
+  if (options.parallel) {
+    // Start all tasks in parallel
+    await Promise.all(buildTasks.map((task) => task()));
+  } else {
+    // Run tasks sequentially
+    for (const task of buildTasks) {
+      await task();
+    }
+  }
 
   // Skip rest for stub and watch mode
   if (options.stub || options.watch) {

src/cli.ts

@@ -41,6 +41,10 @@ const main = defineCommand({
       type: "boolean",
       description: "Generate sourcemaps (experimental)",
     },
+    parallel: {
+      type: "boolean",
+      description: "Run build in parallel (experimental)",
+    },
   },
   async run({ args }) {
     const rootDir = resolve(process.cwd(), args.dir || ".");

src/types.ts

@@ -139,6 +139,12 @@ export interface BuildOptions {
    * [Rollup](https://rollupjs.org/configuration-options) Build Options
    */
   rollup: RollupBuildOptions;
+
+  /**
+   * @experimental
+   * Run build in parallel
+   */
+  parallel: boolean;
 }
 
 export interface BuildContext {