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Merged
bgw merged 2 commits into from
Dec 12, 2025
Merged

Turbopack: Add a custom serde_self_describing Serializer/Deserializer #86885

bgw merged 2 commits into from
Dec 12, 2025
+1,197 −111

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@bgw bgw commented Dec 5, 2025 •
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Implements a minimal custom serde Serializer and Deserializer on top of bincode with a custom self-describing format. The API is exposed as functions that can be used in #[bincode(with = "...")] attributes.

This doesn't encode as efficiently as pot, but it lets us get rid of that dependency entirely. It also gives us a more efficient option than serde_json for certain values.

@nextjs-bot nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. Turbopack Related to Turbopack with Next.js. labels Dec 5, 2025
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bgw commented Dec 5, 2025 •
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This stack of pull requests is managed by Graphite. Learn more about stacking.

@bgw bgw force-pushed the bgw/bincode-self-describing branch from 4b75e7e to 1295048 Compare December 5, 2025 22:03
@vercel vercel deleted a comment from nextjs-bot Dec 5, 2025
@bgw bgw requested a review from a team December 5, 2025 22:04
mischnic
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nextjs-bot commented Dec 5, 2025 •
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Stats from current PR

Default Build (Increase detected ⚠️)
General
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Client Bundles (main, webpack) Overall increase ⚠️
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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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+      /***/
+    },
+
+    /***/ 7813: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -18,8 +35,8 @@
 
       // EXTERNAL MODULE: ./node_modules/.pnpm/[email protected]/node_modules/react/jsx-runtime.js
       var jsx_runtime = __webpack_require__(1329);
-      // EXTERNAL MODULE: ./node_modules/.pnpm/next@[email protected][email protected][email protected]/node_modules/next/image.js
-      var next_image = __webpack_require__(8258);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/next@[email protected][email protected][email protected]/node_modules/next/image.js
+      var next_image = __webpack_require__(6316);
       var image_default = /*#__PURE__*/ __webpack_require__.n(next_image); // ./pages/nextjs.png
       /* harmony default export */ const nextjs = {
         src: "/_next/static/media/nextjs.cae0b805.png",
@@ -48,30 +65,13 @@
 
       /***/
     },
-
-    /***/ 7643: /***/ (
-      __unused_webpack_module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      (window.__NEXT_P = window.__NEXT_P || []).push([
-        "/image",
-        function () {
-          return __webpack_require__(798);
-        },
-      ]);
-      if (false) {
-      }
-
-      /***/
-    },
   },
   /******/ (__webpack_require__) => {
     // webpackRuntimeModules
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
-    /******/ __webpack_require__.O(0, [8258, 636, 6593, 8792], () =>
-      __webpack_exec__(7643)
+    /******/ __webpack_require__.O(0, [6316, 636, 6593, 8792], () =>
+      __webpack_exec__(565)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;
Diff for link-HASH.js 
@@ -1,43 +1,36 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [4672],
   {
-    /***/ 4183: /***/ (module, exports, __webpack_require__) => {
+    /***/ 443: /***/ (
+      module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      module.exports = __webpack_require__(2457);
+
+      /***/
+    },
+
+    /***/ 2185: /***/ (__unused_webpack_module, exports) => {
       "use strict";
 
       Object.defineProperty(exports, "__esModule", {
         value: true,
       });
-      Object.defineProperty(exports, "getDomainLocale", {
+      Object.defineProperty(exports, "errorOnce", {
         enumerable: true,
         get: function () {
-          return getDomainLocale;
+          return errorOnce;
         },
       });
-      const _normalizetrailingslash = __webpack_require__(8887);
-      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
+      let errorOnce = (_) => {};
+      if (false) {
+      } //# sourceMappingURL=error-once.js.map
 
       /***/
     },
 
-    /***/ 5049: /***/ (module, exports, __webpack_require__) => {
+    /***/ 2457: /***/ (module, exports, __webpack_require__) => {
       "use strict";
       /* __next_internal_client_entry_do_not_use__  cjs */
       Object.defineProperty(exports, "__esModule", {
@@ -64,17 +57,17 @@
       const _react = /*#__PURE__*/ _interop_require_wildcard._(
         __webpack_require__(7197)
       );
-      const _resolvehref = __webpack_require__(3575);
-      const _islocalurl = __webpack_require__(4135);
-      const _formaturl = __webpack_require__(3050);
-      const _utils = __webpack_require__(6864);
-      const _addlocale = __webpack_require__(1789);
-      const _routercontextsharedruntime = __webpack_require__(1778);
-      const _useintersection = __webpack_require__(7210);
-      const _getdomainlocale = __webpack_require__(4183);
-      const _addbasepath = __webpack_require__(6518);
-      const _usemergedref = __webpack_require__(9011);
-      const _erroronce = __webpack_require__(5193);
+      const _resolvehref = __webpack_require__(5687);
+      const _islocalurl = __webpack_require__(7127);
+      const _formaturl = __webpack_require__(58);
+      const _utils = __webpack_require__(2080);
+      const _addlocale = __webpack_require__(5709);
+      const _routercontextsharedruntime = __webpack_require__(4770);
+      const _useintersection = __webpack_require__(3290);
+      const _getdomainlocale = __webpack_require__(4615);
+      const _addbasepath = __webpack_require__(8422);
+      const _usemergedref = __webpack_require__(9667);
+      const _erroronce = __webpack_require__(2185);
       const prefetched = new Set();
       function prefetch(router, href, as, options) {
         if (false) {
@@ -453,82 +446,7 @@
       /***/
     },
 
-    /***/ 5193: /***/ (__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
-
-      /***/
-    },
-
-    /***/ 5529: /***/ (
-      module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      module.exports = __webpack_require__(5049);
-
-      /***/
-    },
-
-    /***/ 6887: /***/ (
-      __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__(1329);
-      /* harmony import */ var next_link__WEBPACK_IMPORTED_MODULE_1__ =
-        __webpack_require__(5529);
-      /* 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;
-
-      /***/
-    },
-
-    /***/ 7210: /***/ (module, exports, __webpack_require__) => {
+    /***/ 3290: /***/ (module, exports, __webpack_require__) => {
       "use strict";
 
       Object.defineProperty(exports, "__esModule", {
@@ -541,7 +459,7 @@
         },
       });
       const _react = __webpack_require__(7197);
-      const _requestidlecallback = __webpack_require__(1785);
+      const _requestidlecallback = __webpack_require__(6809);
       const hasIntersectionObserver =
         typeof IntersectionObserver === "function";
       const observers = new Map();
@@ -653,7 +571,106 @@
       /***/
     },
 
-    /***/ 9011: /***/ (module, exports, __webpack_require__) => {
+    /***/ 4615: /***/ (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__(903);
+      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
+
+      /***/
+    },
+
+    /***/ 6745: /***/ (
+      __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__(1329);
+      /* harmony import */ var next_link__WEBPACK_IMPORTED_MODULE_1__ =
+        __webpack_require__(443);
+      /* 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;
+
+      /***/
+    },
+
+    /***/ 7595: /***/ (
+      __unused_webpack_module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      (window.__NEXT_P = window.__NEXT_P || []).push([
+        "/link",
+        function () {
+          return __webpack_require__(6745);
+        },
+      ]);
+      if (false) {
+      }
+
+      /***/
+    },
+
+    /***/ 9667: /***/ (module, exports, __webpack_require__) => {
       "use strict";
 
       Object.defineProperty(exports, "__esModule", {
@@ -730,30 +747,13 @@
 
       /***/
     },
-
-    /***/ 9297: /***/ (
-      __unused_webpack_module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      (window.__NEXT_P = window.__NEXT_P || []).push([
-        "/link",
-        function () {
-          return __webpack_require__(6887);
-        },
-      ]);
-      if (false) {
-      }
-
-      /***/
-    },
   },
   /******/ (__webpack_require__) => {
     // webpackRuntimeModules
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [636, 6593, 8792], () =>
-      __webpack_exec__(9297)
+      __webpack_exec__(7595)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;
Diff for routerDirect-HASH.js 
@@ -1,34 +1,7 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [188],
   {
-    /***/ 1576: /***/ (
-      module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      module.exports = __webpack_require__(5704);
-
-      /***/
-    },
-
-    /***/ 7881: /***/ (
-      __unused_webpack_module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      (window.__NEXT_P = window.__NEXT_P || []).push([
-        "/routerDirect",
-        function () {
-          return __webpack_require__(9851);
-        },
-      ]);
-      if (false) {
-      }
-
-      /***/
-    },
-
-    /***/ 9851: /***/ (
+    /***/ 3401: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -43,7 +16,7 @@
       /* harmony import */ var react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__ =
         __webpack_require__(1329);
       /* harmony import */ var next_router__WEBPACK_IMPORTED_MODULE_1__ =
-        __webpack_require__(1576);
+        __webpack_require__(6702);
       /* harmony import */ var next_router__WEBPACK_IMPORTED_MODULE_1___default =
         /*#__PURE__*/ __webpack_require__.n(
           next_router__WEBPACK_IMPORTED_MODULE_1__
@@ -62,13 +35,40 @@
 
       /***/
     },
+
+    /***/ 4787: /***/ (
+      __unused_webpack_module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      (window.__NEXT_P = window.__NEXT_P || []).push([
+        "/routerDirect",
+        function () {
+          return __webpack_require__(3401);
+        },
+      ]);
+      if (false) {
+      }
+
+      /***/
+    },
+
+    /***/ 6702: /***/ (
+      module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      module.exports = __webpack_require__(728);
+
+      /***/
+    },
   },
   /******/ (__webpack_require__) => {
     // webpackRuntimeModules
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [636, 6593, 8792], () =>
-      __webpack_exec__(7881)
+      __webpack_exec__(4787)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;
Diff for script-HASH.js 
@@ -1,34 +1,17 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [1209],
   {
-    /***/ 2777: /***/ (
-      __unused_webpack_module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      (window.__NEXT_P = window.__NEXT_P || []).push([
-        "/script",
-        function () {
-          return __webpack_require__(9272);
-        },
-      ]);
-      if (false) {
-      }
-
-      /***/
-    },
-
-    /***/ 8662: /***/ (
+    /***/ 6868: /***/ (
       module,
       __unused_webpack_exports,
       __webpack_require__
     ) => {
-      module.exports = __webpack_require__(4550);
+      module.exports = __webpack_require__(1190);
 
       /***/
     },
 
-    /***/ 9272: /***/ (
+    /***/ 7478: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -43,7 +26,7 @@
       /* harmony import */ var react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__ =
         __webpack_require__(1329);
       /* harmony import */ var next_script__WEBPACK_IMPORTED_MODULE_1__ =
-        __webpack_require__(8662);
+        __webpack_require__(6868);
       /* harmony import */ var next_script__WEBPACK_IMPORTED_MODULE_1___default =
         /*#__PURE__*/ __webpack_require__.n(
           next_script__WEBPACK_IMPORTED_MODULE_1__
@@ -75,13 +58,30 @@
 
       /***/
     },
+
+    /***/ 7659: /***/ (
+      __unused_webpack_module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      (window.__NEXT_P = window.__NEXT_P || []).push([
+        "/script",
+        function () {
+          return __webpack_require__(7478);
+        },
+      ]);
+      if (false) {
+      }
+
+      /***/
+    },
   },
   /******/ (__webpack_require__) => {
     // webpackRuntimeModules
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [636, 6593, 8792], () =>
-      __webpack_exec__(2777)
+      __webpack_exec__(7659)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;
Diff for withRouter-HASH.js 
@@ -1,17 +1,7 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [3263],
   {
-    /***/ 1576: /***/ (
-      module,
-      __unused_webpack_exports,
-      __webpack_require__
-    ) => {
-      module.exports = __webpack_require__(5704);
-
-      /***/
-    },
-
-    /***/ 8478: /***/ (
+    /***/ 2528: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -26,7 +16,7 @@
       /* harmony import */ var react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__ =
         __webpack_require__(1329);
       /* harmony import */ var next_router__WEBPACK_IMPORTED_MODULE_1__ =
-        __webpack_require__(1576);
+        __webpack_require__(6702);
       /* harmony import */ var next_router__WEBPACK_IMPORTED_MODULE_1___default =
         /*#__PURE__*/ __webpack_require__.n(
           next_router__WEBPACK_IMPORTED_MODULE_1__
@@ -45,7 +35,17 @@
       /***/
     },
 
-    /***/ 9505: /***/ (
+    /***/ 6702: /***/ (
+      module,
+      __unused_webpack_exports,
+      __webpack_require__
+    ) => {
+      module.exports = __webpack_require__(728);
+
+      /***/
+    },
+
+    /***/ 9763: /***/ (
       __unused_webpack_module,
       __unused_webpack_exports,
       __webpack_require__
@@ -53,7 +53,7 @@
       (window.__NEXT_P = window.__NEXT_P || []).push([
         "/withRouter",
         function () {
-          return __webpack_require__(8478);
+          return __webpack_require__(2528);
         },
       ]);
       if (false) {
@@ -67,7 +67,7 @@
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       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [636, 6593, 8792], () =>
-      __webpack_exec__(9505)
+      __webpack_exec__(9763)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;
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Commit: d54eae2

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codspeed-hq bot commented Dec 5, 2025 •
edited
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CodSpeed Performance Report

Merging #86885 will not alter performance

Comparing bgw/bincode-self-describing (d54eae2) with canary (b17b31f)

Summary

✅ 17 untouched
⏩ 3 skipped1

Footnotes

  1. 3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

@bgw bgw force-pushed the bgw/bincode-self-describing branch from 1295048 to ec083f9 Compare December 5, 2025 23:36
@bgw bgw mentioned this pull request Dec 5, 2025
Merged
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nextjs-bot commented Dec 5, 2025 •
edited
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Tests Passed

@bgw bgw force-pushed the bgw/bincode-self-describing branch from ec083f9 to ac60040 Compare December 5, 2025 23:56
@bgw bgw marked this pull request as ready for review December 6, 2025 00:05
@bgw bgw force-pushed the bgw/bincode-self-describing branch from ac60040 to 34813b3 Compare December 7, 2025 00:11
@bgw bgw mentioned this pull request Dec 7, 2025
Merged
@bgw bgw force-pushed the bgw/bincode-self-describing branch 2 times, most recently from 03182c8 to 24a2ad6 Compare December 8, 2025 23:58
@bgw bgw mentioned this pull request Dec 10, 2025
Merged
@bgw bgw requested a review from a team December 10, 2025 00:43
@bgw bgw mentioned this pull request Dec 11, 2025
Closed
@bgw bgw force-pushed the bgw/bincode-self-describing branch from 24a2ad6 to 5d81273 Compare December 12, 2025 05:26
@bgw bgw force-pushed the bgw/bincode-self-describing branch from 5d81273 to d54eae2 Compare December 12, 2025 05:42
@bgw bgw merged commit b26b2b7 into canary Dec 12, 2025
543 of 552 checks passed
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bgw commented Dec 12, 2025

Merge activity

  • Dec 12, 4:34 PM UTC: @bgw merged this pull request with Graphite.

@bgw bgw deleted the bgw/bincode-self-describing branch December 12, 2025 16:34
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@mischnic mischnic mischnic left review comments

@lukesandberg lukesandberg lukesandberg approved these changes

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created-by: Turbopack team PRs by the Turbopack team. Turbopack Related to Turbopack with Next.js.

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