[Segment Cache] Implement prefetch inlining #81897

acdlite · 2025-07-21T15:59:16Z

Based on:

[router-act] Fixes related to segment inlining #81896

In the Segment Cache implementation, we split page prefetches into multiple requests so that each one can be cached and deduped independently. For example, if multiple pages share the same layout, the data for that layout only needs to be fetched once. This approach can greatly reduce the overall transfer size at the cost of additional requests, which is typically minimal, especially since it happens during the prefetch phase.

However, some segments are small enough that the potential caching benefits are not worth additional network overhead. So we can inline them directly into the initial route tree prefetch response, potentially avoiding a separate request. Again, it's not a perfect trade-off, since that separate request may have been skipped anyway if the segment was already cached. It's just a heuristic. But below some size, inlining is worth it.

(Publicly, we may end up referring to this strategy as prefetch outlining rather than inlining, since compared to the current Next.js behavior, that's the part that's actually new in the Segment Cache.)

I've chosen 2KB (gzipped) as the default threshold. We can do some more research and tweak this later.

In addition to using the size of the segment prefetch, we also take into consideration the total inlined size of the tree prefetch. The idea is that even if each individual segment is below the inlining threshold, at some point it no longer makes sense to add more bytes to the tree prefetch, because the tree prefetch requests are unique per URL and cannot be deduped the way segments can. I've chosen 10KB as the default for this limit.

Deeper segments are more likely to be unique to a page, so they are more likely to benefit from inlining. We prioritize the deepest segments when inlining.

For now, the prefetch thresholds are hardcoded. We may make them configurable, but ideally the defaults are good enough that it isn't necessary. One reason to expose the configuration, though, is that some apps may be more sensitive to the number of requests than others. By setting a very large inlining threshold, you can effectively disable the layout deduping feature and "revert" back to something closer to the existing Next.js behavior. We'll think about this more before release.

Another thing worth considering is whether to use different inlining thresholds for different network conditions. For example, mobile devices on slow networks may benefit from more aggressive inlining, whereas devices on WiFi benefit more from deduping. To do this, we would generate multiple prefetch responses per page and the client would request the appropriate one based on the Network Information API.

packages/next/src/server/app-render/collect-segment-data.tsx

ijjk · 2025-07-21T16:20:01Z

Tests Passed

ijjk · 2025-07-21T16:40:17Z

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	acdlite/next.js segment-cache-inlining	Change
buildDuration	23.8s	18s	N/A
buildDurationCached	17.2s	14.8s	N/A
nodeModulesSize	442 MB	443 MB	⚠️ +82.5 kB
nextStartRea..uration (ms)	432ms	434ms	N/A

Client Bundles (main, webpack) Overall increase ⚠️

	vercel/next.js canary	acdlite/next.js segment-cache-inlining	Change
194b18f3-HASH.js gzip	54.1 kB	54.1 kB	✓
2192.HASH.js gzip	169 B	169 B	✓
4719-HASH.js gzip	5.3 kB	5.27 kB	N/A
6236-HASH.js gzip	44.1 kB	44.6 kB	⚠️ +554 B
framework-HASH.js gzip	57.4 kB	57.4 kB	N/A
main-app-HASH.js gzip	253 B	258 B	N/A
main-HASH.js gzip	36 kB	36.1 kB	⚠️ +114 B
webpack-HASH.js gzip	1.71 kB	1.71 kB	N/A
Overall change	134 kB	135 kB	⚠️ +668 B

Legacy Client Bundles (polyfills)

	vercel/next.js canary	acdlite/next.js segment-cache-inlining	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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_app-HASH.js gzip	193 B	193 B	✓
_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
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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
script-HASH.js gzip	386 B	386 B	✓
withRouter-HASH.js gzip	316 B	315 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	1.51 kB	1.51 kB	✓

Client Build Manifests

	vercel/next.js canary	acdlite/next.js segment-cache-inlining	Change
_buildManifest.js gzip	752 B	752 B	✓
Overall change	752 B	752 B	✓

Rendered Page Sizes

	vercel/next.js canary	acdlite/next.js segment-cache-inlining	Change
index.html gzip	523 B	524 B	N/A
link.html gzip	537 B	539 B	N/A
withRouter.html gzip	520 B	521 B	N/A
Overall change	0 B	0 B	✓

Edge SSR bundle Size Overall increase ⚠️

	vercel/next.js canary	acdlite/next.js segment-cache-inlining	Change
edge-ssr.js gzip	120 kB	120 kB	⚠️ +212 B
page.js gzip	221 kB	215 kB	N/A
Overall change	120 kB	120 kB	⚠️ +212 B

Middleware size

	vercel/next.js canary	acdlite/next.js segment-cache-inlining	Change
middleware-b..fest.js gzip	676 B	674 B	N/A
middleware-r..fest.js gzip	155 B	157 B	N/A
middleware.js gzip	32.2 kB	32.3 kB	N/A
edge-runtime..pack.js gzip	853 B	853 B	✓
Overall change	853 B	853 B	✓

Next Runtimes

	vercel/next.js canary	acdlite/next.js segment-cache-inlining	Change
app-page-exp...dev.js gzip	279 kB	279 kB	N/A
app-page-exp..prod.js gzip	154 kB	154 kB	N/A
app-page-tur...dev.js gzip	279 kB	279 kB	N/A
app-page-tur..prod.js gzip	154 kB	154 kB	N/A
app-page-tur...dev.js gzip	264 kB	264 kB	N/A
app-page-tur..prod.js gzip	148 kB	148 kB	N/A
app-page.run...dev.js gzip	264 kB	264 kB	N/A
app-page.run..prod.js gzip	148 kB	148 kB	N/A
app-route-ex...dev.js gzip	69 kB	69 kB	✓
app-route-ex..prod.js gzip	48.5 kB	48.5 kB	✓
app-route-tu...dev.js gzip	69 kB	69 kB	✓
app-route-tu..prod.js gzip	48.5 kB	48.5 kB	✓
app-route-tu...dev.js gzip	68.4 kB	68.4 kB	✓
app-route-tu..prod.js gzip	48.1 kB	48.1 kB	✓
app-route.ru...dev.js gzip	68.4 kB	68.4 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	42.2 kB	42.2 kB	✓
pages-api-tu..prod.js gzip	32.4 kB	32.4 kB	✓
pages-api.ru...dev.js gzip	42.1 kB	42.1 kB	✓
pages-api.ru..prod.js gzip	32.4 kB	32.4 kB	✓
pages-turbo....dev.js gzip	52.1 kB	52.1 kB	✓
pages-turbo...prod.js gzip	39.8 kB	39.8 kB	✓
pages.runtim...dev.js gzip	52.3 kB	52.3 kB	✓
pages.runtim..prod.js gzip	39.9 kB	39.9 kB	✓
server.runti..prod.js gzip	64.1 kB	64.1 kB	✓
Overall change	867 kB	867 kB	✓

build cache Overall increase ⚠️

	vercel/next.js canary	acdlite/next.js segment-cache-inlining	Change
0.pack gzip	3.91 MB	3.91 MB	⚠️ +7.58 kB
index.pack gzip	90.8 kB	90.5 kB	N/A
Overall change	3.91 MB	3.91 MB	⚠️ +7.58 kB

Diff details

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+      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
+
+      /***/
+    },
+
+    /***/ 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__;

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@@ -1,64 +1,64 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [4977],
   {
-    /***/ 3505: /***/ () => {
-      /* (ignored) */
-      /***/
-    },
-
-    /***/ 8614: /***/ (
+    /***/ 3306: /***/ (
       __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__(8614))
+      [9910, 4860],
+      () => (__webpack_exec__(1389), __webpack_exec__(3306))
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;

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Commit: 1dd4d7f

packages/next/src/client/components/segment-cache-impl/lru.ts

Noticed a bug when updating the memory-pressure test; the head of the LRU was not being evicted properly due to a mistake when updating the `next` and `prev` pointers.

In the Segment Cache implementation, we split page prefetches into multiple requests so that each one can be cached and deduped independently. For example, if multiple pages share the same layout, the data for that layout only needs to be fetched once. This approach can greatly reduce the overall transfer size at the cost of additional requests, which is typically minimal, especially since it happens during the prefetch phase. However, some segments are small enough that the potential caching benefits are not worth additional network overhead. So we can inline them directly into the initial route tree prefetch response, potentially avoiding a separate request. Again, it's not a perfect trade-off, since that separate request may have been skipped anyway if the segment was already cached. It's just a heuristic. But below some size, inlining is worth it. (Publicly, we may end up referring to this strategy as prefetch _outlining_ rather than _inlining_, since compared to the current Next.js behavior, that's the part that's actually new in the Segment Cache.) I've chosen 2KB (gzipped) as the default threshold. We can do some more research and tweak this later. In addition to using the size of the segment prefetch, we also take into consideration the total inlined size of the tree prefetch. The idea is that even if each individual segment is below the inlining threshold, at some point it no longer makes sense to add more bytes to the tree prefetch, because the tree prefetch requests are unique per URL and cannot be deduped the way segments can. I've chosen 10KB as the default for this limit. Deeper segments are more likely to be unique to a page, so they are more likely to benefit from inlining. We prioritize the deepest segments when inlining. For now, the prefetch thresholds are hardcoded. We may make them configurable, by ideally the defaults are good enough that it isn't necessary. One reason to expose the configuration, though, is that some apps may be more sensitive to the number of requests than others. By setting a very large inlining threshold, you can effectively disable the layout deduping feature and "revert" back to something closer to the existing Next.js behavior. We'll think about this more before release. Another thing worth considering is whether to use different inlining thresholds for different network conditions. For example, mobile devices on slow networks may benefit from more aggressive inlining, whereas devices on WiFi benefit more from deduping. To do this, we would generate multiple prefetch responses per page and the client would request the appropriate one based on the [Network Information API](https://developer.mozilla.org/en-US/docs/Web/API/Network_Information_API).

acdlite changed the title ~~Segment cache inlining~~ [Segment Cache] Implement prefetch inlining Jul 21, 2025

graphite-app bot reviewed Jul 21, 2025

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acdlite force-pushed the segment-cache-inlining branch 2 times, most recently from ce89747 to 0744b12 Compare July 21, 2025 16:08

acdlite force-pushed the segment-cache-inlining branch from 0744b12 to 4604baa Compare July 21, 2025 16:33

ijjk added created-by: Next.js team PRs by the Next.js team. tests type: next labels Jul 21, 2025

acdlite force-pushed the segment-cache-inlining branch from 4604baa to 2a87ffd Compare July 21, 2025 17:09

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packages/next/src/client/components/segment-cache-impl/lru.ts Show resolved Hide resolved

acdlite force-pushed the segment-cache-inlining branch 3 times, most recently from 3a94d7b to a551494 Compare July 21, 2025 18:58

acdlite requested a review from lubieowoce July 22, 2025 02:09

acdlite added 2 commits July 22, 2025 11:34

Fix: LRU eviction bug

70fd3fe

Noticed a bug when updating the memory-pressure test; the head of the LRU was not being evicted properly due to a mistake when updating the `next` and `prev` pointers.

acdlite force-pushed the segment-cache-inlining branch from a551494 to 1dd4d7f Compare July 22, 2025 15:36

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[Segment Cache] Implement prefetch inlining #81897

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