[turbopack] use `require` to load chunks in our node runtime #81738

lukesandberg · 2025-07-16T22:11:55Z

Use `require` to load chunks in node instead of readFile+eval

The benefit of this is that we can slightly simplify chunk loading and make it easier for hosting services to cache bytecode.

Much like browsers, server environments often leverage VM features to cache parsed javascript as bytecode (or maybe binary ast?) to accelerate cold starts (example), however, these systems generally avoid caching highly dynamic content like inline scripts and eval parameters.

So just use require which is what platforms expect! This should help platforms achieve code caching, is generally simpler, and by not adding a prefix we fix some subtle off-by-one issue with source maps.

A slightly better solution imho would be import() since it would enable node to do some file reading parsing async with the main thread which could be important if there are multiple preloadModules, however this breaks dev mode hot reloading.

Fixes #PACK-5062

Closes PACK-5095

lukesandberg · 2025-07-16T22:12:12Z

[turbopack] use require to load chunks in our node runtime #81738 👈 (View in Graphite)
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ijjk · 2025-07-16T22:23:26Z

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	vercel/next.js require	Change
buildDuration	18.5s	15.9s	N/A
buildDurationCached	14.9s	13.1s	N/A
nodeModulesSize	441 MB	441 MB	✓
nextStartRea..uration (ms)	398ms	408ms	N/A

Client Bundles (main, webpack) Overall increase ⚠️

	vercel/next.js canary	vercel/next.js require	Change
194b18f3-HASH.js gzip	54.1 kB	54.1 kB	N/A
2192.HASH.js gzip	169 B	169 B	✓
4719-HASH.js gzip	5.3 kB	5.27 kB	N/A
6236-HASH.js gzip	44 kB	44.6 kB	⚠️ +551 B
framework-HASH.js gzip	57.4 kB	57.4 kB	N/A
main-app-HASH.js gzip	254 B	258 B	N/A
main-HASH.js gzip	35.9 kB	36 kB	⚠️ +123 B
webpack-HASH.js gzip	1.71 kB	1.71 kB	N/A
Overall change	80.1 kB	80.8 kB	⚠️ +674 B

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js require	Change
polyfills-HASH.js gzip	39.4 kB	39.4 kB	✓
Overall change	39.4 kB	39.4 kB	✓

Client Pages

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_error-HASH.js gzip	182 B	182 B	✓
amp-HASH.js gzip	501 B	500 B	N/A
css-HASH.js gzip	335 B	333 B	N/A
dynamic-HASH.js gzip	1.83 kB	1.83 kB	N/A
edge-ssr-HASH.js gzip	256 B	255 B	N/A
head-HASH.js gzip	350 B	351 B	N/A
hooks-HASH.js gzip	382 B	382 B	✓
image-HASH.js gzip	4.68 kB	4.66 kB	N/A
index-HASH.js gzip	259 B	259 B	✓
link-HASH.js gzip	2.52 kB	2.52 kB	N/A
routerDirect..HASH.js gzip	319 B	316 B	N/A
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withRouter-HASH.js gzip	316 B	315 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
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Client Build Manifests

	vercel/next.js canary	vercel/next.js require	Change
_buildManifest.js gzip	752 B	752 B	✓
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Rendered Page Sizes

	vercel/next.js canary	vercel/next.js require	Change
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link.html gzip	537 B	539 B	N/A
withRouter.html gzip	519 B	521 B	N/A
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Edge SSR bundle Size

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edge-ssr.js gzip	121 kB	121 kB	N/A
page.js gzip	242 kB	237 kB	N/A
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Middleware size Overall increase ⚠️

	vercel/next.js canary	vercel/next.js require	Change
middleware-b..fest.js gzip	676 B	675 B	N/A
middleware-r..fest.js gzip	155 B	157 B	N/A
middleware.js gzip	32.2 kB	32.4 kB	⚠️ +267 B
edge-runtime..pack.js gzip	853 B	853 B	✓
Overall change	33 kB	33.3 kB	⚠️ +267 B

Next Runtimes

	vercel/next.js canary	vercel/next.js require	Change
app-page-exp...dev.js gzip	278 kB	278 kB	N/A
app-page-exp..prod.js gzip	154 kB	154 kB	✓
app-page-tur...dev.js gzip	278 kB	278 kB	N/A
app-page-tur..prod.js gzip	154 kB	154 kB	✓
app-page-tur...dev.js gzip	263 kB	263 kB	N/A
app-page-tur..prod.js gzip	148 kB	148 kB	✓
app-page.run...dev.js gzip	263 kB	263 kB	N/A
app-page.run..prod.js gzip	148 kB	148 kB	✓
app-route-ex...dev.js gzip	68.9 kB	68.9 kB	✓
app-route-ex..prod.js gzip	48.5 kB	48.5 kB	✓
app-route-tu...dev.js gzip	68.9 kB	68.9 kB	✓
app-route-tu..prod.js gzip	48.5 kB	48.5 kB	✓
app-route-tu...dev.js gzip	68.3 kB	68.3 kB	✓
app-route-tu..prod.js gzip	48.1 kB	48.1 kB	✓
app-route.ru...dev.js gzip	68.2 kB	68.2 kB	✓
app-route.ru..prod.js gzip	48.1 kB	48.1 kB	✓
dist_client_...dev.js gzip	326 B	326 B	✓
dist_client_...dev.js gzip	328 B	328 B	✓
dist_client_...dev.js gzip	320 B	320 B	✓
dist_client_...dev.js gzip	318 B	318 B	✓
pages-api-tu...dev.js gzip	42.1 kB	42.1 kB	✓
pages-api-tu..prod.js gzip	32.4 kB	32.4 kB	✓
pages-api.ru...dev.js gzip	42 kB	42 kB	✓
pages-api.ru..prod.js gzip	32.4 kB	32.4 kB	✓
pages-turbo....dev.js gzip	52 kB	52 kB	✓
pages-turbo...prod.js gzip	39.8 kB	39.8 kB	✓
pages.runtim...dev.js gzip	52.2 kB	52.2 kB	✓
pages.runtim..prod.js gzip	39.9 kB	39.9 kB	✓
server.runti..prod.js gzip	64.3 kB	64.3 kB	✓
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build cache

	vercel/next.js canary	vercel/next.js require	Change
0.pack gzip	3.9 MB	3.89 MB	N/A
index.pack gzip	90.2 kB	88.7 kB	N/A
Overall change	0 B	0 B	✓

Diff details

Diff for page.js

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Diff for middleware.js

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Diff for edge-ssr.js

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+      }
+      function applyRef(refA, current) {
+        if (typeof refA === "function") {
+          const cleanup = refA(current);
+          if (typeof cleanup === "function") {
+            return cleanup;
+          } else {
+            return () => refA(null);
+          }
+        } else {
+          refA.current = current;
+          return () => {
+            refA.current = null;
+          };
+        }
+      }
+      if (
+        (typeof exports.default === "function" ||
+          (typeof exports.default === "object" && exports.default !== null)) &&
+        typeof exports.default.__esModule === "undefined"
+      ) {
+        Object.defineProperty(exports.default, "__esModule", {
+          value: true,
+        });
+        Object.assign(exports.default, exports);
+        module.exports = exports.default;
+      } //# sourceMappingURL=use-merged-ref.js.map
+
+      /***/
+    },
+
+    /***/ 3353: /***/ (
+      module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      module.exports = __webpack_require__(5526);
+
+      /***/
+    },
+
+    /***/ 3594: /***/ (
+      __unused_webpack_module,
+      __webpack_exports__,
+      __webpack_require__
+    ) => {
+      "use strict";
+      // ESM COMPAT FLAG
+      __webpack_require__.r(__webpack_exports__);
+
+      // EXPORTS
+      __webpack_require__.d(__webpack_exports__, {
+        __N_SSP: () => /* binding */ __N_SSP,
+        default: () => /* binding */ pages_image,
+      });
+
+      // EXTERNAL MODULE: ./node_modules/.pnpm/[email protected]/node_modules/react/jsx-runtime.js
+      var jsx_runtime = __webpack_require__(5640);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/next@[email protected][email protected][email protected]/node_modules/next/image.js
+      var next_image = __webpack_require__(3353);
+      var image_default = /*#__PURE__*/ __webpack_require__.n(next_image); // ./pages/nextjs.png
+      /* harmony default export */ const nextjs = {
+        src: "/_next/static/media/nextjs.cae0b805.png",
+        height: 1347,
+        width: 1626,
+        blurDataURL:
+          "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAHCAMAAAACh/xsAAAAD1BMVEX////x8fH6+vrb29vo6Oh8o70bAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAH0lEQVR4nGNgwARMjIyMjCAGCzMzMwsTRISJCcRABwAEcAAkLCQfgAAAAABJRU5ErkJggg==",
+        blurWidth: 8,
+        blurHeight: 7,
+      }; // ./pages/image.js
+      function ImagePage(props) {
+        return /*#__PURE__*/ (0, jsx_runtime.jsxs)(jsx_runtime.Fragment, {
+          children: [
+            /*#__PURE__*/ (0, jsx_runtime.jsx)("h1", {
+              children: "next/image example",
+            }),
+            /*#__PURE__*/ (0, jsx_runtime.jsx)(image_default(), {
+              src: nextjs,
+              placeholder: "blur",
+            }),
+          ],
+        });
+      }
+      var __N_SSP = true;
+      /* harmony default export */ const pages_image = ImagePage;
+
+      /***/
+    },
+
+    /***/ 3854: /***/ (
       __unused_webpack_module,
       exports,
       __webpack_require__
@@ -34,9 +217,9 @@
           return getImgProps;
         },
       });
-      const _warnonce = __webpack_require__(5127);
-      const _imageblursvg = __webpack_require__(4287);
-      const _imageconfig = __webpack_require__(2795);
+      const _warnonce = __webpack_require__(3603);
+      const _imageblursvg = __webpack_require__(7835);
+      const _imageconfig = __webpack_require__(6799);
       const VALID_LOADING_VALUES =
         /* unused pure expression or super */ null && [
           "lazy",
@@ -463,55 +646,69 @@
       /***/
     },
 
-    /***/ 3444: /***/ (
+    /***/ 5526: /***/ (
       __unused_webpack_module,
-      __webpack_exports__,
+      exports,
       __webpack_require__
     ) => {
       "use strict";
-      // ESM COMPAT FLAG
-      __webpack_require__.r(__webpack_exports__);
 
-      // EXPORTS
-      __webpack_require__.d(__webpack_exports__, {
-        __N_SSP: () => /* binding */ __N_SSP,
-        default: () => /* binding */ pages_image,
+      Object.defineProperty(exports, "__esModule", {
+        value: true,
       });
-
-      // EXTERNAL MODULE: ./node_modules/.pnpm/[email protected]/node_modules/react/jsx-runtime.js
-      var jsx_runtime = __webpack_require__(5640);
-      // EXTERNAL MODULE: ./node_modules/.pnpm/next@[email protected][email protected][email protected]/node_modules/next/image.js
-      var next_image = __webpack_require__(6359);
-      var image_default = /*#__PURE__*/ __webpack_require__.n(next_image); // ./pages/nextjs.png
-      /* harmony default export */ const nextjs = {
-        src: "/_next/static/media/nextjs.cae0b805.png",
-        height: 1347,
-        width: 1626,
-        blurDataURL:
-          "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAHCAMAAAACh/xsAAAAD1BMVEX////x8fH6+vrb29vo6Oh8o70bAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAH0lEQVR4nGNgwARMjIyMjCAGCzMzMwsTRISJCcRABwAEcAAkLCQfgAAAAABJRU5ErkJggg==",
-        blurWidth: 8,
-        blurHeight: 7,
-      }; // ./pages/image.js
-      function ImagePage(props) {
-        return /*#__PURE__*/ (0, jsx_runtime.jsxs)(jsx_runtime.Fragment, {
-          children: [
-            /*#__PURE__*/ (0, jsx_runtime.jsx)("h1", {
-              children: "next/image example",
-            }),
-            /*#__PURE__*/ (0, jsx_runtime.jsx)(image_default(), {
-              src: nextjs,
-              placeholder: "blur",
-            }),
-          ],
+      0 && 0;
+      function _export(target, all) {
+        for (var name in all)
+          Object.defineProperty(target, name, {
+            enumerable: true,
+            get: all[name],
+          });
+      }
+      _export(exports, {
+        default: function () {
+          return _default;
+        },
+        getImageProps: function () {
+          return getImageProps;
+        },
+      });
+      const _interop_require_default = __webpack_require__(1532);
+      const _getimgprops = __webpack_require__(3854);
+      const _imagecomponent = __webpack_require__(8350);
+      const _imageloader = /*#__PURE__*/ _interop_require_default._(
+        __webpack_require__(1206)
+      );
+      function getImageProps(imgProps) {
+        const { props } = (0, _getimgprops.getImgProps)(imgProps, {
+          defaultLoader: _imageloader.default,
+          // This is replaced by webpack define plugin
+          imgConf: {
+            deviceSizes: [640, 750, 828, 1080, 1200, 1920, 2048, 3840],
+            imageSizes: [16, 32, 48, 64, 96, 128, 256, 384],
+            path: "/_next/image",
+            loader: "default",
+            dangerouslyAllowSVG: false,
+            unoptimized: false,
+          },
         });
+        // Normally we don't care about undefined props because we pass to JSX,
+        // but this exported function could be used by the end user for anything
+        // so we delete undefined props to clean it up a little.
+        for (const [key, value] of Object.entries(props)) {
+          if (value === undefined) {
+            delete props[key];
+          }
+        }
+        return {
+          props,
+        };
       }
-      var __N_SSP = true;
-      /* harmony default export */ const pages_image = ImagePage;
+      const _default = _imagecomponent.Image; //# sourceMappingURL=image-external.js.map
 
       /***/
     },
 
-    /***/ 4287: /***/ (__unused_webpack_module, exports) => {
+    /***/ 7835: /***/ (__unused_webpack_module, exports) => {
       "use strict";
       /**
        * A shared function, used on both client and server, to generate a SVG blur placeholder.
@@ -566,85 +763,7 @@
       /***/
     },
 
-    /***/ 4985: /***/ (module, exports, __webpack_require__) => {
-      "use strict";
-
-      Object.defineProperty(exports, "__esModule", {
-        value: true,
-      });
-      Object.defineProperty(exports, "useMergedRef", {
-        enumerable: true,
-        get: function () {
-          return useMergedRef;
-        },
-      });
-      const _react = __webpack_require__(148);
-      function useMergedRef(refA, refB) {
-        const cleanupA = (0, _react.useRef)(null);
-        const cleanupB = (0, _react.useRef)(null);
-        // NOTE: In theory, we could skip the wrapping if only one of the refs is non-null.
-        // (this happens often if the user doesn't pass a ref to Link/Form/Image)
-        // But this can cause us to leak a cleanup-ref into user code (e.g. via `<Link legacyBehavior>`),
-        // and the user might pass that ref into ref-merging library that doesn't support cleanup refs
-        // (because it hasn't been updated for React 19)
-        // which can then cause things to blow up, because a cleanup-returning ref gets called with `null`.
-        // So in practice, it's safer to be defensive and always wrap the ref, even on React 19.
-        return (0, _react.useCallback)(
-          (current) => {
-            if (current === null) {
-              const cleanupFnA = cleanupA.current;
-              if (cleanupFnA) {
-                cleanupA.current = null;
-                cleanupFnA();
-              }
-              const cleanupFnB = cleanupB.current;
-              if (cleanupFnB) {
-                cleanupB.current = null;
-                cleanupFnB();
-              }
-            } else {
-              if (refA) {
-                cleanupA.current = applyRef(refA, current);
-              }
-              if (refB) {
-                cleanupB.current = applyRef(refB, current);
-              }
-            }
-          },
-          [refA, refB]
-        );
-      }
-      function applyRef(refA, current) {
-        if (typeof refA === "function") {
-          const cleanup = refA(current);
-          if (typeof cleanup === "function") {
-            return cleanup;
-          } else {
-            return () => refA(null);
-          }
-        } else {
-          refA.current = current;
-          return () => {
-            refA.current = null;
-          };
-        }
-      }
-      if (
-        (typeof exports.default === "function" ||
-          (typeof exports.default === "object" && exports.default !== null)) &&
-        typeof exports.default.__esModule === "undefined"
-      ) {
-        Object.defineProperty(exports.default, "__esModule", {
-          value: true,
-        });
-        Object.assign(exports.default, exports);
-        module.exports = exports.default;
-      } //# sourceMappingURL=use-merged-ref.js.map
-
-      /***/
-    },
-
-    /***/ 5898: /***/ (module, exports, __webpack_require__) => {
+    /***/ 8350: /***/ (module, exports, __webpack_require__) => {
       "use strict";
       /* __next_internal_client_entry_do_not_use__  cjs */
       Object.defineProperty(exports, "__esModule", {
@@ -666,17 +785,17 @@
         __webpack_require__(7897)
       );
       const _head = /*#__PURE__*/ _interop_require_default._(
-        __webpack_require__(5207)
+        __webpack_require__(8843)
       );
-      const _getimgprops = __webpack_require__(2514);
-      const _imageconfig = __webpack_require__(2795);
-      const _imageconfigcontextsharedruntime = __webpack_require__(2349);
-      const _warnonce = __webpack_require__(5127);
-      const _routercontextsharedruntime = __webpack_require__(3556);
+      const _getimgprops = __webpack_require__(3854);
+      const _imageconfig = __webpack_require__(6799);
+      const _imageconfigcontextsharedruntime = __webpack_require__(3905);
+      const _warnonce = __webpack_require__(3603);
+      const _routercontextsharedruntime = __webpack_require__(6712);
       const _imageloader = /*#__PURE__*/ _interop_require_default._(
-        __webpack_require__(5970)
+        __webpack_require__(1206)
       );
-      const _usemergedref = __webpack_require__(4985);
+      const _usemergedref = __webpack_require__(1765);
       // This is replaced by webpack define plugin
       const configEnv = {
         deviceSizes: [640, 750, 828, 1080, 1200, 1920, 2048, 3840],
@@ -1001,132 +1120,13 @@
 
       /***/
     },
-
-    /***/ 5970: /***/ (__unused_webpack_module, exports) => {
-      "use strict";
-
-      Object.defineProperty(exports, "__esModule", {
-        value: true,
-      });
-      Object.defineProperty(exports, "default", {
-        enumerable: true,
-        get: function () {
-          return _default;
-        },
-      });
-      const DEFAULT_Q = 75;
-      function defaultLoader(param) {
-        let { config, src, width, quality } = param;
-        var _config_qualities;
-        if (false) {
-        }
-        const q =
-          quality ||
-          ((_config_qualities = config.qualities) == null
-            ? void 0
-            : _config_qualities.reduce((prev, cur) =>
-                Math.abs(cur - DEFAULT_Q) < Math.abs(prev - DEFAULT_Q)
-                  ? cur
-                  : prev
-              )) ||
-          DEFAULT_Q;
-        return (
-          config.path +
-          "?url=" +
-          encodeURIComponent(src) +
-          "&w=" +
-          width +
-          "&q=" +
-          q +
-          (src.startsWith("/_next/static/media/") && false ? 0 : "")
-        );
-      }
-      // We use this to determine if the import is the default loader
-      // or a custom loader defined by the user in next.config.js
-      defaultLoader.__next_img_default = true;
-      const _default = defaultLoader; //# sourceMappingURL=image-loader.js.map
-
-      /***/
-    },
-
-    /***/ 6359: /***/ (
-      module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      module.exports = __webpack_require__(8986);
-
-      /***/
-    },
-
-    /***/ 8986: /***/ (
-      __unused_webpack_module,
-      exports,
-      __webpack_require__
-    ) => {
-      "use strict";
-
-      Object.defineProperty(exports, "__esModule", {
-        value: true,
-      });
-      0 && 0;
-      function _export(target, all) {
-        for (var name in all)
-          Object.defineProperty(target, name, {
-            enumerable: true,
-            get: all[name],
-          });
-      }
-      _export(exports, {
-        default: function () {
-          return _default;
-        },
-        getImageProps: function () {
-          return getImageProps;
-        },
-      });
-      const _interop_require_default = __webpack_require__(1532);
-      const _getimgprops = __webpack_require__(2514);
-      const _imagecomponent = __webpack_require__(5898);
-      const _imageloader = /*#__PURE__*/ _interop_require_default._(
-        __webpack_require__(5970)
-      );
-      function getImageProps(imgProps) {
-        const { props } = (0, _getimgprops.getImgProps)(imgProps, {
-          defaultLoader: _imageloader.default,
-          // This is replaced by webpack define plugin
-          imgConf: {
-            deviceSizes: [640, 750, 828, 1080, 1200, 1920, 2048, 3840],
-            imageSizes: [16, 32, 48, 64, 96, 128, 256, 384],
-            path: "/_next/image",
-            loader: "default",
-            dangerouslyAllowSVG: false,
-            unoptimized: false,
-          },
-        });
-        // Normally we don't care about undefined props because we pass to JSX,
-        // but this exported function could be used by the end user for anything
-        // so we delete undefined props to clean it up a little.
-        for (const [key, value] of Object.entries(props)) {
-          if (value === undefined) {
-            delete props[key];
-          }
-        }
-        return {
-          props,
-        };
-      }
-      const _default = _imagecomponent.Image; //# sourceMappingURL=image-external.js.map
-
-      /***/
-    },
   },
   /******/ (__webpack_require__) => {
     // webpackRuntimeModules
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [636, 6593, 8792], () =>
-      __webpack_exec__(2198)
+      __webpack_exec__(264)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;

Diff for index-HASH.js

@@ -1,7 +1,24 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [3332],
   {
-    /***/ 9418: /***/ (
+    /***/ 8230: /***/ (
+      __unused_webpack_module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      (window.__NEXT_P = window.__NEXT_P || []).push([
+        "/",
+        function () {
+          return __webpack_require__(8696);
+        },
+      ]);
+      if (false) {
+      }
+
+      /***/
+    },
+
+    /***/ 8696: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -19,30 +36,13 @@
 
       /***/
     },
-
-    /***/ 9532: /***/ (
-      __unused_webpack_module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      (window.__NEXT_P = window.__NEXT_P || []).push([
-        "/",
-        function () {
-          return __webpack_require__(9418);
-        },
-      ]);
-      if (false) {
-      }
-
-      /***/
-    },
   },
   /******/ (__webpack_require__) => {
     // webpackRuntimeModules
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [636, 6593, 8792], () =>
-      __webpack_exec__(9532)
+      __webpack_exec__(8230)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;

Diff for link-HASH.js

@@ -1,125 +1,7 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [4672],
   {
-    /***/ 1854: /***/ (
-      __unused_webpack_module,
-      __webpack_exports__,
-      __webpack_require__
-    ) => {
-      "use strict";
-      __webpack_require__.r(__webpack_exports__);
-      /* harmony export */ __webpack_require__.d(__webpack_exports__, {
-        /* harmony export */ __N_SSP: () => /* binding */ __N_SSP,
-        /* harmony export */ default: () => __WEBPACK_DEFAULT_EXPORT__,
-        /* harmony export */
-      });
-      /* harmony import */ var react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__ =
-        __webpack_require__(5640);
-      /* harmony import */ var next_link__WEBPACK_IMPORTED_MODULE_1__ =
-        __webpack_require__(8770);
-      /* harmony import */ var next_link__WEBPACK_IMPORTED_MODULE_1___default =
-        /*#__PURE__*/ __webpack_require__.n(
-          next_link__WEBPACK_IMPORTED_MODULE_1__
-        );
-
-      function aLink(props) {
-        return /*#__PURE__*/ (0,
-        react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__.jsxs)("div", {
-          children: [
-            /*#__PURE__*/ (0,
-            react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__.jsx)("h3", {
-              children: "A Link page!",
-            }),
-            /*#__PURE__*/ (0,
-            react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__.jsx)(
-              next_link__WEBPACK_IMPORTED_MODULE_1___default(),
-              {
-                href: "/",
-                children: "Go to /",
-              }
-            ),
-          ],
-        });
-      }
-      var __N_SSP = true;
-      /* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = aLink;
-
-      /***/
-    },
-
-    /***/ 3199: /***/ (__unused_webpack_module, exports) => {
-      "use strict";
-
-      Object.defineProperty(exports, "__esModule", {
-        value: true,
-      });
-      Object.defineProperty(exports, "errorOnce", {
-        enumerable: true,
-        get: function () {
-          return errorOnce;
-        },
-      });
-      let errorOnce = (_) => {};
-      if (false) {
-      } //# sourceMappingURL=error-once.js.map
-
-      /***/
-    },
-
-    /***/ 3568: /***/ (
-      __unused_webpack_module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      (window.__NEXT_P = window.__NEXT_P || []).push([
-        "/link",
-        function () {
-          return __webpack_require__(1854);
-        },
-      ]);
-      if (false) {
-      }
-
-      /***/
-    },
-
-    /***/ 3857: /***/ (module, exports, __webpack_require__) => {
-      "use strict";
-
-      Object.defineProperty(exports, "__esModule", {
-        value: true,
-      });
-      Object.defineProperty(exports, "getDomainLocale", {
-        enumerable: true,
-        get: function () {
-          return getDomainLocale;
-        },
-      });
-      const _normalizetrailingslash = __webpack_require__(4869);
-      const basePath =
-        /* unused pure expression or super */ null && (false || "");
-      function getDomainLocale(path, locale, locales, domainLocales) {
-        if (false) {
-        } else {
-          return false;
-        }
-      }
-      if (
-        (typeof exports.default === "function" ||
-          (typeof exports.default === "object" && exports.default !== null)) &&
-        typeof exports.default.__esModule === "undefined"
-      ) {
-        Object.defineProperty(exports.default, "__esModule", {
-          value: true,
-        });
-        Object.assign(exports.default, exports);
-        module.exports = exports.default;
-      } //# sourceMappingURL=get-domain-locale.js.map
-
-      /***/
-    },
-
-    /***/ 3947: /***/ (module, exports, __webpack_require__) => {
+    /***/ 591: /***/ (module, exports, __webpack_require__) => {
       "use strict";
       /* __next_internal_client_entry_do_not_use__  cjs */
       Object.defineProperty(exports, "__esModule", {
@@ -146,17 +28,17 @@
       const _react = /*#__PURE__*/ _interop_require_wildcard._(
         __webpack_require__(148)
       );
-      const _resolvehref = __webpack_require__(3161);
-      const _islocalurl = __webpack_require__(2309);
-      const _formaturl = __webpack_require__(3768);
-      const _utils = __webpack_require__(5554);
-      const _addlocale = __webpack_require__(7591);
-      const _routercontextsharedruntime = __webpack_require__(3556);
-      const _useintersection = __webpack_require__(5624);
-      const _getdomainlocale = __webpack_require__(3857);
-      const _addbasepath = __webpack_require__(4356);
-      const _usemergedref = __webpack_require__(4985);
-      const _erroronce = __webpack_require__(3199);
+      const _resolvehref = __webpack_require__(5837);
+      const _islocalurl = __webpack_require__(5953);
+      const _formaturl = __webpack_require__(6212);
+      const _utils = __webpack_require__(6950);
+      const _addlocale = __webpack_require__(6467);
+      const _routercontextsharedruntime = __webpack_require__(6712);
+      const _useintersection = __webpack_require__(9692);
+      const _getdomainlocale = __webpack_require__(6850);
+      const _addbasepath = __webpack_require__(4928);
+      const _usemergedref = __webpack_require__(1765);
+      const _erroronce = __webpack_require__(8659);
       const prefetched = new Set();
       function prefetch(router, href, as, options) {
         if (false) {
@@ -545,7 +427,17 @@
       /***/
     },
 
-    /***/ 4985: /***/ (module, exports, __webpack_require__) => {
+    /***/ 1148: /***/ (
+      module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      module.exports = __webpack_require__(591);
+
+      /***/
+    },
+
+    /***/ 1765: /***/ (module, exports, __webpack_require__) => {
       "use strict";
 
       Object.defineProperty(exports, "__esModule", {
@@ -623,7 +515,125 @@
       /***/
     },
 
-    /***/ 5624: /***/ (module, exports, __webpack_require__) => {
+    /***/ 5436: /***/ (
+      __unused_webpack_module,
+      __webpack_exports__,
+      __webpack_require__
+    ) => {
+      "use strict";
+      __webpack_require__.r(__webpack_exports__);
+      /* harmony export */ __webpack_require__.d(__webpack_exports__, {
+        /* harmony export */ __N_SSP: () => /* binding */ __N_SSP,
+        /* harmony export */ default: () => __WEBPACK_DEFAULT_EXPORT__,
+        /* harmony export */
+      });
+      /* harmony import */ var react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__ =
+        __webpack_require__(5640);
+      /* harmony import */ var next_link__WEBPACK_IMPORTED_MODULE_1__ =
+        __webpack_require__(1148);
+      /* harmony import */ var next_link__WEBPACK_IMPORTED_MODULE_1___default =
+        /*#__PURE__*/ __webpack_require__.n(
+          next_link__WEBPACK_IMPORTED_MODULE_1__
+        );
+
+      function aLink(props) {
+        return /*#__PURE__*/ (0,
+        react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__.jsxs)("div", {
+          children: [
+            /*#__PURE__*/ (0,
+            react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__.jsx)("h3", {
+              children: "A Link page!",
+            }),
+            /*#__PURE__*/ (0,
+            react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__.jsx)(
+              next_link__WEBPACK_IMPORTED_MODULE_1___default(),
+              {
+                href: "/",
+                children: "Go to /",
+              }
+            ),
+          ],
+        });
+      }
+      var __N_SSP = true;
+      /* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = aLink;
+
+      /***/
+    },
+
+    /***/ 6850: /***/ (module, exports, __webpack_require__) => {
+      "use strict";
+
+      Object.defineProperty(exports, "__esModule", {
+        value: true,
+      });
+      Object.defineProperty(exports, "getDomainLocale", {
+        enumerable: true,
+        get: function () {
+          return getDomainLocale;
+        },
+      });
+      const _normalizetrailingslash = __webpack_require__(6457);
+      const basePath =
+        /* unused pure expression or super */ null && (false || "");
+      function getDomainLocale(path, locale, locales, domainLocales) {
+        if (false) {
+        } else {
+          return false;
+        }
+      }
+      if (
+        (typeof exports.default === "function" ||
+          (typeof exports.default === "object" && exports.default !== null)) &&
+        typeof exports.default.__esModule === "undefined"
+      ) {
+        Object.defineProperty(exports.default, "__esModule", {
+          value: true,
+        });
+        Object.assign(exports.default, exports);
+        module.exports = exports.default;
+      } //# sourceMappingURL=get-domain-locale.js.map
+
+      /***/
+    },
+
+    /***/ 8659: /***/ (__unused_webpack_module, exports) => {
+      "use strict";
+
+      Object.defineProperty(exports, "__esModule", {
+        value: true,
+      });
+      Object.defineProperty(exports, "errorOnce", {
+        enumerable: true,
+        get: function () {
+          return errorOnce;
+        },
+      });
+      let errorOnce = (_) => {};
+      if (false) {
+      } //# sourceMappingURL=error-once.js.map
+
+      /***/
+    },
+
+    /***/ 9666: /***/ (
+      __unused_webpack_module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      (window.__NEXT_P = window.__NEXT_P || []).push([
+        "/link",
+        function () {
+          return __webpack_require__(5436);
+        },
+      ]);
+      if (false) {
+      }
+
+      /***/
+    },
+
+    /***/ 9692: /***/ (module, exports, __webpack_require__) => {
       "use strict";
 
       Object.defineProperty(exports, "__esModule", {
@@ -636,7 +646,7 @@
         },
       });
       const _react = __webpack_require__(148);
-      const _requestidlecallback = __webpack_require__(3543);
+      const _requestidlecallback = __webpack_require__(315);
       const hasIntersectionObserver =
         typeof IntersectionObserver === "function";
       const observers = new Map();
@@ -748,23 +758,13 @@
 
       /***/
     },
-
-    /***/ 8770: /***/ (
-      module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      module.exports = __webpack_require__(3947);
-
-      /***/
-    },
   },
   /******/ (__webpack_require__) => {
     // webpackRuntimeModules
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [636, 6593, 8792], () =>
-      __webpack_exec__(3568)
+      __webpack_exec__(9666)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;

Diff for routerDirect-HASH.js

@@ -1,7 +1,7 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [188],
   {
-    /***/ 3618: /***/ (
+    /***/ 76: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -16,7 +16,7 @@
       /* harmony import */ var react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__ =
         __webpack_require__(5640);
       /* harmony import */ var next_router__WEBPACK_IMPORTED_MODULE_1__ =
-        __webpack_require__(4631);
+        __webpack_require__(9413);
       /* harmony import */ var next_router__WEBPACK_IMPORTED_MODULE_1___default =
         /*#__PURE__*/ __webpack_require__.n(
           next_router__WEBPACK_IMPORTED_MODULE_1__
@@ -36,17 +36,7 @@
       /***/
     },
 
-    /***/ 4631: /***/ (
-      module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      module.exports = __webpack_require__(7086);
-
-      /***/
-    },
-
-    /***/ 7824: /***/ (
+    /***/ 1810: /***/ (
       __unused_webpack_module,
       __unused_webpack_exports,
       __webpack_require__
@@ -54,7 +44,7 @@
       (window.__NEXT_P = window.__NEXT_P || []).push([
         "/routerDirect",
         function () {
-          return __webpack_require__(3618);
+          return __webpack_require__(76);
         },
       ]);
       if (false) {
@@ -62,13 +52,23 @@
 
       /***/
     },
+
+    /***/ 9413: /***/ (
+      module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      module.exports = __webpack_require__(5282);
+
+      /***/
+    },
   },
   /******/ (__webpack_require__) => {
     // webpackRuntimeModules
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [636, 6593, 8792], () =>
-      __webpack_exec__(7824)
+      __webpack_exec__(1810)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;

Diff for script-HASH.js

@@ -1,24 +1,17 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [1209],
   {
-    /***/ 1984: /***/ (
-      __unused_webpack_module,
+    /***/ 2227: /***/ (
+      module,
       __unused_webpack_exports,
       __webpack_require__
     ) => {
-      (window.__NEXT_P = window.__NEXT_P || []).push([
-        "/script",
-        function () {
-          return __webpack_require__(5769);
-        },
-      ]);
-      if (false) {
-      }
+      module.exports = __webpack_require__(5984);
 
       /***/
     },
 
-    /***/ 5769: /***/ (
+    /***/ 3043: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -33,7 +26,7 @@
       /* harmony import */ var react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__ =
         __webpack_require__(5640);
       /* harmony import */ var next_script__WEBPACK_IMPORTED_MODULE_1__ =
-        __webpack_require__(8293);
+        __webpack_require__(2227);
       /* harmony import */ var next_script__WEBPACK_IMPORTED_MODULE_1___default =
         /*#__PURE__*/ __webpack_require__.n(
           next_script__WEBPACK_IMPORTED_MODULE_1__
@@ -66,12 +59,19 @@
       /***/
     },
 
-    /***/ 8293: /***/ (
-      module,
+    /***/ 3642: /***/ (
+      __unused_webpack_module,
       __unused_webpack_exports,
       __webpack_require__
     ) => {
-      module.exports = __webpack_require__(900);
+      (window.__NEXT_P = window.__NEXT_P || []).push([
+        "/script",
+        function () {
+          return __webpack_require__(3043);
+        },
+      ]);
+      if (false) {
+      }
 
       /***/
     },
@@ -81,7 +81,7 @@
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [636, 6593, 8792], () =>
-      __webpack_exec__(1984)
+      __webpack_exec__(3642)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;

Diff for withRouter-HASH.js

@@ -1,34 +1,7 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [3263],
   {
-    /***/ 4631: /***/ (
-      module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      module.exports = __webpack_require__(7086);
-
-      /***/
-    },
-
-    /***/ 9216: /***/ (
-      __unused_webpack_module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      (window.__NEXT_P = window.__NEXT_P || []).push([
-        "/withRouter",
-        function () {
-          return __webpack_require__(9803);
-        },
-      ]);
-      if (false) {
-      }
-
-      /***/
-    },
-
-    /***/ 9803: /***/ (
+    /***/ 1089: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -43,7 +16,7 @@
       /* harmony import */ var react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__ =
         __webpack_require__(5640);
       /* harmony import */ var next_router__WEBPACK_IMPORTED_MODULE_1__ =
-        __webpack_require__(4631);
+        __webpack_require__(9413);
       /* harmony import */ var next_router__WEBPACK_IMPORTED_MODULE_1___default =
         /*#__PURE__*/ __webpack_require__.n(
           next_router__WEBPACK_IMPORTED_MODULE_1__
@@ -61,13 +34,40 @@
 
       /***/
     },
+
+    /***/ 3962: /***/ (
+      __unused_webpack_module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      (window.__NEXT_P = window.__NEXT_P || []).push([
+        "/withRouter",
+        function () {
+          return __webpack_require__(1089);
+        },
+      ]);
+      if (false) {
+      }
+
+      /***/
+    },
+
+    /***/ 9413: /***/ (
+      module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      module.exports = __webpack_require__(5282);
+
+      /***/
+    },
   },
   /******/ (__webpack_require__) => {
     // webpackRuntimeModules
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [636, 6593, 8792], () =>
-      __webpack_exec__(9216)
+      __webpack_exec__(3962)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;

Diff for 4719-HASH.js

Diff too large to display

Diff for 6236-HASH.js

Diff too large to display

Diff for main-HASH.js

Diff too large to display

Diff for main-app-HASH.js

@@ -1,64 +1,64 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [4977],
   {
-    /***/ 3505: /***/ () => {
-      /* (ignored) */
-      /***/
-    },
-
-    /***/ 5130: /***/ (
+    /***/ 2686: /***/ (
       __unused_webpack_module,
       __unused_webpack_exports,
       __webpack_require__
     ) => {
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 8790, 23)
+        __webpack_require__.t.bind(__webpack_require__, 5356, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 7537, 23)
+        __webpack_require__.t.bind(__webpack_require__, 1099, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 7382, 23)
+        __webpack_require__.t.bind(__webpack_require__, 4304, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 9442, 23)
+        __webpack_require__.t.bind(__webpack_require__, 3152, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 2439, 23)
+        __webpack_require__.t.bind(__webpack_require__, 7601, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 5083, 23)
+        __webpack_require__.t.bind(__webpack_require__, 2553, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 8103, 23)
+        __webpack_require__.t.bind(__webpack_require__, 1925, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 5625, 23)
+        __webpack_require__.t.bind(__webpack_require__, 959, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 4247, 23)
+        __webpack_require__.t.bind(__webpack_require__, 9389, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 5602, 23)
+        __webpack_require__.t.bind(__webpack_require__, 8628, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 2193, 23)
+        __webpack_require__.t.bind(__webpack_require__, 5439, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.bind(__webpack_require__, 5223)
+        __webpack_require__.bind(__webpack_require__, 8685)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 227, 23)
+        __webpack_require__.t.bind(__webpack_require__, 3077, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 6734, 23)
+        __webpack_require__.t.bind(__webpack_require__, 7812, 23)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.t.bind(__webpack_require__, 4120, 23)
+        __webpack_require__.t.bind(__webpack_require__, 5774, 23)
       );
 
       /***/
     },
+
+    /***/ 3579: /***/ () => {
+      /* (ignored) */
+      /***/
+    },
   },
   /******/ (__webpack_require__) => {
     // webpackRuntimeModules
@@ -66,8 +66,8 @@
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(
       0,
-      [1305, 6236],
-      () => (__webpack_exec__(9679), __webpack_exec__(5130))
+      [9910, 4860],
+      () => (__webpack_exec__(1389), __webpack_exec__(2686))
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;

Commit: b2d1d0d

ijjk · 2025-07-16T22:24:26Z

Tests Passed

codspeed-hq · 2025-07-16T22:40:01Z

CodSpeed Performance Report

Merging #81738 will not alter performance

_{Comparing require (b2d1d0d) with canary (ae2c750)}

Summary

✅ 9 untouched benchmarks

turbopack/crates/turbopack-ecmascript-runtime/js/src/nodejs/runtime.ts

mischnic · 2025-07-18T11:12:22Z

The only reason why we have this async variant is as a (theoretical) optimization for not blocking on IO.

But we can just revert this completely as it turns out this has multiple downsides: http://github.com/vercel/turborepo/pull/8722

It's still nice to have it be (unnecessarily) async though so that the browser and the Nodejs versions of __turbopack_load__ (__turbopack_context__.l) have the same API

lukesandberg · 2025-07-18T16:40:56Z

yeah maintaining async makes sense to me. simply tagging the uncached function as async is sufficient to achieve that.

the other option is to use import(...) this should be even better since file-io and even initial parsing can happen off the main thread. afaict we support Nodejs 18+ so this should just work. If we change the chunk to be an esm module that would be even better but im guessing we are blocked on that due to changing use strict semantics

We still return a promise to satisfy our call signatures but resolution is now synchronously performed by `require`

gnoff · 2025-07-18T19:02:59Z

We can see if there is impacts in eagerly requiring chunks in practice. Seb thinks it is plausible that any later rows would be immediately blocked on this chunk anyway so doing it async probably does not speed up any potential rendering and would only serve to slow down the eventual resolution of the chunk

turbopack/crates/turbopack-ecmascript-runtime/js/src/nodejs/runtime.ts

lukesandberg · 2025-07-18T19:07:34Z

sadly import() breaks hot reloading in dev.

import() is ideal from a performance perspective if the main call is preload since nodejs can execute them in parallel. so a solution where we only do 'fake async require' in dev would make sense to me.

i guess the other point is that callers just want to go! so fake async is pure overhead.

gnoff · 2025-07-18T19:13:26Z

call is preload since nodejs can execute them in parallel

I've seen plenty of benchmarks that indicate sync fs is faster in many cases due to the much lower overhead. So I don't think we should maintain a preference for async file reads unless we convince ourselves a typical turbo app in SSR would actually benefit from async IO

lukesandberg · 2025-07-18T19:16:38Z

yeah totally I totally agree that sync fs is faster (the OS isn't async anyway). i think the benefit would primarily be about allowing v8 to do module parsing on a background thread. but this is speculative.

didn't mean to block, just meant to rescind my approval

lukesandberg · 2025-07-18T19:18:32Z

ok, back to require version, import() breaks dev anyway 😥

…81738) ## Use `require` to load chunks in node instead of readFile+eval The benefit of this is that we can slightly simplify chunk loading and make it easier for hosting services to cache bytecode. Much like [browsers](https://v8.dev/blog/code-caching-for-devs), server environments often leverage VM features to cache parsed javascript as bytecode (or maybe binary ast?) to accelerate cold starts ([example](https://vercel.com/blog/introducing-bytecode-caching-for-vercel-functions)), however, these systems generally avoid caching highly dynamic content like inline scripts and `eval` parameters. So just use `require` which is what platforms expect! This should help platforms achieve code caching, is generally simpler, and by not adding a prefix we fix some subtle off-by-one issue with source maps. A slightly better solution imho would be `import()` since it would enable node to do some file reading parsing async with the main thread which could be important if there are multiple `preloadModules`, however this breaks dev mode hot reloading. Fixes #PACK-5062

ijjk added created-by: Turbopack team PRs by the Turbopack team. Turbopack Related to Turbopack with Next.js. labels Jul 16, 2025

lukesandberg changed the title ~~Is it this easy~~ [turbopack] use require to load chunks in our node runtime Jul 16, 2025

eps1lon reviewed Jul 17, 2025

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ijjk added the tests label Jul 17, 2025

lukesandberg force-pushed the require branch from 5332389 to 8d9e3c1 Compare July 17, 2025 17:57

lukesandberg marked this pull request as ready for review July 17, 2025 18:03

lukesandberg requested a review from a team July 17, 2025 18:03

mischnic reviewed Jul 17, 2025

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lukesandberg requested a review from mischnic July 17, 2025 19:04

lukesandberg force-pushed the require branch 2 times, most recently from 99ff614 to 4d5e3fd Compare July 17, 2025 23:50

mischnic approved these changes Jul 18, 2025

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unstubbable reviewed Jul 18, 2025

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turbopack/crates/turbopack-ecmascript-runtime/js/src/nodejs/runtime.ts Show resolved Hide resolved

lukesandberg changed the title ~~[turbopack] use require to load chunks in our node runtime~~ [turbopack] use import to load chunks in our node runtime Jul 18, 2025

lukesandberg added 6 commits July 18, 2025 11:05

Is it this easy

44e571c

snapshots

4b2dbac

update test snapshots

5f4bef0

fix merge mistakes

86d1eb9

Make loadChunkAsync load chunks synchronously

b429008

We still return a promise to satisfy our call signatures but resolution is now synchronously performed by `require`

touch runtime-> update snapshot

b563eef

lukesandberg force-pushed the require branch from f6abb60 to 8989c54 Compare July 18, 2025 18:22

gnoff approved these changes Jul 18, 2025

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gnoff previously requested changes Jul 18, 2025

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turbopack/crates/turbopack-ecmascript-runtime/js/src/nodejs/runtime.ts Show resolved Hide resolved

lukesandberg changed the title ~~[turbopack] use import to load chunks in our node runtime~~ [turbopack] use require to load chunks in our node runtime Jul 18, 2025

leave a comment about dynamic import

09c86b1

snappy snap snap

b2d1d0d

lukesandberg force-pushed the require branch from 8989c54 to b2d1d0d Compare July 18, 2025 19:17

lukesandberg merged commit 8a8888c into canary Jul 18, 2025
165 checks passed

lukesandberg deleted the require branch July 18, 2025 19:54

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[turbopack] use `require` to load chunks in our node runtime #81738

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Use require to load chunks in node instead of readFile+eval

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lukesandberg commented Jul 18, 2025

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gnoff commented Jul 18, 2025

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lukesandberg commented Jul 18, 2025

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lukesandberg commented Jul 18, 2025

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[turbopack] use `require` to load chunks in our node runtime #81738

[turbopack] use `require` to load chunks in our node runtime #81738

lukesandberg commented Jul 16, 2025 •

edited by padmaia

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Use `require` to load chunks in node instead of readFile+eval

ijjk commented Jul 16, 2025 •

edited

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ijjk commented Jul 16, 2025 •

edited

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codspeed-hq bot commented Jul 16, 2025 •

edited

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mischnic commented Jul 18, 2025 •

edited

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