feat(turbopack): Attempt to detect and warn about slow file IO #66057

bgw · 2024-05-21T23:16:19Z

We'd like to warn users if they have particularly slow file IO, so that they can correct the problem themselves, and don't send us reports of poor performance.

Feature request: https://vercel.slack.com/archives/C03KAR5DCKC/p1716051650641529
Tweet about how Bun does this: https://x.com/jarredsumner/status/1637549427677364224
Bun implementation: https://github.com/oven-sh/bun/blob/06a9aa80c38b08b3148bfeabe560697956d38a64/src/install/install.zig#L3038

Why 100ms? Bun used to use 10ms, found it too noisy, and switched to 100ms.

This benchmark should run non-blocking in the background and should not meaningfully slow down server startup (even on slow disks).

Testing

I looked around and found https://github.com/schoentoon/slowpokefs/. It hasn't been updated in 10 years, but still seems to build fine.

In a nextjs project directory, turn .next into an artifically slow mount point:

fusermount -uz .next; rm -rf .next .next.real && mkdir .next .next.real && ~/slowpokefs/slowpokefs -m 50 -M 50 --no-slow-read -F .next.real .next

Run pnpm dev --turbo and see that the warning is generated.

I'll also grab a really old USB 2.0 external HDD from home tomorrow and verify that I can trigger the warning with that.

Questions

Is println! good enough here? That seems like the only option we have right now for showing things to the user from within Rust. It would be nicer if we could use something structured like tracing, but that's not shown to the user.
Is there some better place to put this check?
Is the .next directory the right place to do this? We want something in the project directory, but we don't really have a cache or temporary directory for turbopack (yet). This benchmark should at least clean up after itself.

Fixes PACK-3087

bgw · 2024-05-21T23:16:34Z

feat(turbopack): Attempt to detect and warn about slow file IO #66057 👈
next-swc: Update from tokio 1.32.0 to 1.37.0 #66087
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ijjk · 2024-05-21T23:26:54Z

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	vercel/next.js bgw/slow-io	Change
buildDuration	16s	14.6s	N/A
buildDurationCached	8.1s	7.6s	N/A
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nextStartRea..uration (ms)	409ms	410ms	N/A

Client Bundles (main, webpack)

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Rendered Page Sizes

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Edge SSR bundle Size

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Middleware size

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Next Runtimes

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build cache Overall increase ⚠️

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0.pack gzip	1.67 MB	1.67 MB	⚠️ +585 B
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Diff details

Diff for page.js

@@ -15,7 +15,7 @@
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@@ -30,7 +30,7 @@
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+      // NAMESPACE OBJECT: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/build/webpack/loaders/next-app-loader.js?name=app%2Fapp-edge-ssr%2Fpage&page=%2Fapp-edge-ssr%2Fpage&pagePath=private-next-app-dir%2Fapp-edge-ssr%2Fpage.js&appDir=%2Ftmp%2Fnext-statsf1yoL3%2Fstats-app%2Fapp&appPaths=%2Fapp-edge-ssr%2Fpage&pageExtensions=tsx&pageExtensions=ts&pageExtensions=jsx&pageExtensions=js&basePath=&assetPrefix=&nextConfigOutput=&preferredRegion=&middlewareConfig=e30%3D!./app/app-edge-ssr/page.js?__next_edge_ssr_entry__
       var page_next_edge_ssr_entry_namespaceObject = {};
       __webpack_require__.r(page_next_edge_ssr_entry_namespaceObject);
       __webpack_require__.d(page_next_edge_ssr_entry_namespaceObject, {
@@ -71,24 +71,24 @@
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-      var globals = __webpack_require__(2174);
-      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+main-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_52riaj2pppk6biljiae3nnywwa/node_modules/next/dist/esm/server/web/adapter.js + 3 modules
-      var adapter = __webpack_require__(7701);
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-      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+main-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_52riaj2pppk6biljiae3nnywwa/node_modules/next/dist/esm/server/lib/incremental-cache/index.js + 3 modules
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-      var route_kind = __webpack_require__(6115);
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-      var entry_base = __webpack_require__(869); // CONCATENATED MODULE: ./node_modules/.pnpm/file+..+main-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_52riaj2pppk6biljiae3nnywwa/node_modules/next/dist/build/webpack/loaders/next-app-loader.js?name=app%2Fapp-edge-ssr%2Fpage&page=%2Fapp-edge-ssr%2Fpage&pagePath=private-next-app-dir%2Fapp-edge-ssr%2Fpage.js&appDir=%2Ftmp%2Fnext-statsf1yoL3%2Fstats-app%2Fapp&appPaths=%2Fapp-edge-ssr%2Fpage&pageExtensions=tsx&pageExtensions=ts&pageExtensions=jsx&pageExtensions=js&basePath=&assetPrefix=&nextConfigOutput=&preferredRegion=&middlewareConfig=e30%3D!./app/app-edge-ssr/page.js?__next_edge_ssr_entry__
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/server/web/globals.js
+      var globals = __webpack_require__(4074);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/server/web/adapter.js + 3 modules
+      var adapter = __webpack_require__(6283);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/build/webpack/loaders/next-edge-ssr-loader/render.js + 88 modules
+      var render = __webpack_require__(3052);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/server/lib/incremental-cache/index.js + 3 modules
+      var incremental_cache = __webpack_require__(9753);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/server/app-render/app-render.js + 50 modules
+      var app_render = __webpack_require__(6858);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/server/future/route-modules/app-page/module.compiled.js
+      var module_compiled = __webpack_require__(1105);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/server/future/route-kind.js
+      var route_kind = __webpack_require__(602);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/client/components/error-boundary.js
+      var error_boundary = __webpack_require__(9231);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/server/app-render/entry-base.js + 10 modules
+      var entry_base = __webpack_require__(8578); // CONCATENATED MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/build/webpack/loaders/next-app-loader.js?name=app%2Fapp-edge-ssr%2Fpage&page=%2Fapp-edge-ssr%2Fpage&pagePath=private-next-app-dir%2Fapp-edge-ssr%2Fpage.js&appDir=%2Ftmp%2Fnext-statsf1yoL3%2Fstats-app%2Fapp&appPaths=%2Fapp-edge-ssr%2Fpage&pageExtensions=tsx&pageExtensions=ts&pageExtensions=jsx&pageExtensions=js&basePath=&assetPrefix=&nextConfigOutput=&preferredRegion=&middlewareConfig=e30%3D!./app/app-edge-ssr/page.js?__next_edge_ssr_entry__
       // We inject the tree and pages here so that we can use them in the route
       // module.
       const tree = {
@@ -105,7 +105,7 @@
                     page: [
                       () =>
                         Promise.resolve(/* import() eager */).then(
-                          __webpack_require__.bind(__webpack_require__, 5916)
+                          __webpack_require__.bind(__webpack_require__, 5908)
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                       "/tmp/next-statsf1yoL3/stats-app/app/app-edge-ssr/page.js",
                     ],
@@ -119,14 +119,14 @@
             layout: [
               () =>
                 Promise.resolve(/* import() eager */).then(
-                  __webpack_require__.bind(__webpack_require__, 544)
+                  __webpack_require__.bind(__webpack_require__, 1328)
                 ),
               "/tmp/next-statsf1yoL3/stats-app/app/layout.js",
             ],
             "not-found": [
               () =>
                 Promise.resolve(/* import() eager */).then(
-                  __webpack_require__.bind(__webpack_require__, 7619)
+                  __webpack_require__.bind(__webpack_require__, 1432)
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@@ -162,12 +162,12 @@
       });
 
       //# sourceMappingURL=app-page.js.map
-      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+main-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_52riaj2pppk6biljiae3nnywwa/node_modules/next/dist/esm/lib/page-types.js
-      var page_types = __webpack_require__(3364);
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-      var encryption_utils = __webpack_require__(6196);
-      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+main-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_52riaj2pppk6biljiae3nnywwa/node_modules/next/dist/esm/server/app-render/action-utils.js
-      var action_utils = __webpack_require__(4201); // CONCATENATED MODULE: ./node_modules/.pnpm/file+..+main-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_52riaj2pppk6biljiae3nnywwa/node_modules/next/dist/build/webpack/loaders/next-edge-ssr-loader/index.js?{"absolute500Path":"","absoluteAppPath":"next/dist/pages/_app","absoluteDocumentPath":"next/dist/pages/_document","absoluteErrorPath":"next/dist/pages/_error","absolutePagePath":"private-next-app-dir/app-edge-ssr/page.js","dev":false,"isServerComponent":true,"page":"/app-edge-ssr/page","stringifiedConfig":"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+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/lib/page-types.js
+      var page_types = __webpack_require__(8766);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/server/app-render/encryption-utils.js
+      var encryption_utils = __webpack_require__(7656);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/esm/server/app-render/action-utils.js
+      var action_utils = __webpack_require__(6894); // CONCATENATED MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/dist/build/webpack/loaders/next-edge-ssr-loader/index.js?{"absolute500Path":"","absoluteAppPath":"next/dist/pages/_app","absoluteDocumentPath":"next/dist/pages/_document","absoluteErrorPath":"next/dist/pages/_error","absolutePagePath":"private-next-app-dir/app-edge-ssr/page.js","dev":false,"isServerComponent":true,"page":"/app-edge-ssr/page","stringifiedConfig":"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       var _self___RSC_MANIFEST;
 
       const incrementalCacheHandler = null;
@@ -426,47 +426,47 @@
       /***/
     },
 
-    /***/ 4013: /***/ (
+    /***/ 8933: /***/ (
       __unused_webpack_module,
       __unused_webpack_exports,
       __webpack_require__
     ) => {
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.bind(__webpack_require__, 126)
+        __webpack_require__.bind(__webpack_require__, 3236)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.bind(__webpack_require__, 9330)
+        __webpack_require__.bind(__webpack_require__, 4801)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.bind(__webpack_require__, 1366)
+        __webpack_require__.bind(__webpack_require__, 1237)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.bind(__webpack_require__, 5874)
+        __webpack_require__.bind(__webpack_require__, 2748)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.bind(__webpack_require__, 4797)
+        __webpack_require__.bind(__webpack_require__, 8662)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.bind(__webpack_require__, 7955)
+        __webpack_require__.bind(__webpack_require__, 197)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.bind(__webpack_require__, 9316)
+        __webpack_require__.bind(__webpack_require__, 4759)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.bind(__webpack_require__, 3404)
+        __webpack_require__.bind(__webpack_require__, 3743)
       );
       Promise.resolve(/* import() eager */).then(
-        __webpack_require__.bind(__webpack_require__, 6625)
+        __webpack_require__.bind(__webpack_require__, 318)
       );
 
       /***/
     },
 
-    /***/ 2971: /***/ () => {
+    /***/ 2576: /***/ () => {
       /***/
     },
 
-    /***/ 5916: /***/ (
+    /***/ 5908: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -486,7 +486,7 @@
       /***/
     },
 
-    /***/ 544: /***/ (
+    /***/ 1328: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -498,7 +498,7 @@
         /* harmony export */
       });
       /* harmony import */ var react_jsx_runtime__WEBPACK_IMPORTED_MODULE_0__ =
-        __webpack_require__(5595);
+        __webpack_require__(7903);
 
       function RootLayout({ children }) {
         return /*#__PURE__*/ (0,
@@ -517,7 +517,7 @@
     // webpackRuntimeModules
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
-    /******/ __webpack_require__.O(0, [601, 672], () => __webpack_exec__(5830));
+    /******/ __webpack_require__.O(0, [899, 828], () => __webpack_exec__(2558));
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ (_ENTRIES = typeof _ENTRIES === "undefined" ? {} : _ENTRIES)[
       "middleware_app/app-edge-ssr/page"

Diff for middleware.js

Diff too large to display

Diff for edge-ssr.js

Diff too large to display

Diff for image-HASH.js

@@ -1,7 +1,7 @@
 (self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([
   [8358],
   {
-    /***/ 1122: /***/ (
+    /***/ 2058: /***/ (
       __unused_webpack_module,
       __unused_webpack_exports,
       __webpack_require__
@@ -9,7 +9,7 @@
       (window.__NEXT_P = window.__NEXT_P || []).push([
         "/image",
         function () {
-          return __webpack_require__(3294);
+          return __webpack_require__(6302);
         },
       ]);
       if (false) {
@@ -18,7 +18,7 @@
       /***/
     },
 
-    /***/ 2985: /***/ (module, exports, __webpack_require__) => {
+    /***/ 6392: /***/ (module, exports, __webpack_require__) => {
       "use strict";
       /* __next_internal_client_entry_do_not_use__  cjs */
       Object.defineProperty(exports, "__esModule", {
@@ -40,15 +40,15 @@
         __webpack_require__(6024)
       );
       const _head = /*#__PURE__*/ _interop_require_default._(
-        __webpack_require__(7364)
+        __webpack_require__(7174)
       );
-      const _getimgprops = __webpack_require__(3108);
-      const _imageconfig = __webpack_require__(9828);
-      const _imageconfigcontextsharedruntime = __webpack_require__(9053);
-      const _warnonce = __webpack_require__(587);
-      const _routercontextsharedruntime = __webpack_require__(3766);
+      const _getimgprops = __webpack_require__(4804);
+      const _imageconfig = __webpack_require__(2977);
+      const _imageconfigcontextsharedruntime = __webpack_require__(9777);
+      const _warnonce = __webpack_require__(3257);
+      const _routercontextsharedruntime = __webpack_require__(3543);
       const _imageloader = /*#__PURE__*/ _interop_require_default._(
-        __webpack_require__(3189)
+        __webpack_require__(8406)
       );
       // This is replaced by webpack define plugin
       const configEnv = {
@@ -376,7 +376,7 @@
       /***/
     },
 
-    /***/ 3108: /***/ (
+    /***/ 4804: /***/ (
       __unused_webpack_module,
       exports,
       __webpack_require__
@@ -392,9 +392,9 @@
           return getImgProps;
         },
       });
-      const _warnonce = __webpack_require__(587);
-      const _imageblursvg = __webpack_require__(4779);
-      const _imageconfig = __webpack_require__(9828);
+      const _warnonce = __webpack_require__(3257);
+      const _imageblursvg = __webpack_require__(8719);
+      const _imageconfig = __webpack_require__(2977);
       const VALID_LOADING_VALUES =
         /* unused pure expression or super */ null && [
           "lazy",
@@ -769,7 +769,7 @@
       /***/
     },
 
-    /***/ 4779: /***/ (__unused_webpack_module, exports) => {
+    /***/ 8719: /***/ (__unused_webpack_module, exports) => {
       "use strict";
       /**
        * A shared function, used on both client and server, to generate a SVG blur placeholder.
@@ -824,7 +824,7 @@
       /***/
     },
 
-    /***/ 6660: /***/ (
+    /***/ 260: /***/ (
       __unused_webpack_module,
       exports,
       __webpack_require__
@@ -851,10 +851,10 @@
         },
       });
       const _interop_require_default = __webpack_require__(1478);
-      const _getimgprops = __webpack_require__(3108);
-      const _imagecomponent = __webpack_require__(2985);
+      const _getimgprops = __webpack_require__(4804);
+      const _imagecomponent = __webpack_require__(6392);
       const _imageloader = /*#__PURE__*/ _interop_require_default._(
-        __webpack_require__(3189)
+        __webpack_require__(8406)
       );
       function getImageProps(imgProps) {
         const { props } = (0, _getimgprops.getImgProps)(imgProps, {
@@ -886,7 +886,7 @@
       /***/
     },
 
-    /***/ 3189: /***/ (__unused_webpack_module, exports) => {
+    /***/ 8406: /***/ (__unused_webpack_module, exports) => {
       "use strict";
 
       Object.defineProperty(exports, "__esModule", {
@@ -921,7 +921,7 @@
       /***/
     },
 
-    /***/ 3294: /***/ (
+    /***/ 6302: /***/ (
       __unused_webpack_module,
       __webpack_exports__,
       __webpack_require__
@@ -938,8 +938,8 @@
 
       // EXTERNAL MODULE: ./node_modules/.pnpm/react@19.0.0-rc-81c5ff2e04-20240521/node_modules/react/jsx-runtime.js
       var jsx_runtime = __webpack_require__(5293);
-      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+main-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_52riaj2pppk6biljiae3nnywwa/node_modules/next/image.js
-      var next_image = __webpack_require__(6828);
+      // EXTERNAL MODULE: ./node_modules/.pnpm/file+..+diff-repo+packages+next+next-packed.tgz_react-dom@19.0.0-rc-81c5ff2e04-20240521_react_qjsttk5yohmngz5jvpmxy4vvtq/node_modules/next/image.js
+      var next_image = __webpack_require__(3132);
       var image_default = /*#__PURE__*/ __webpack_require__.n(next_image); // CONCATENATED MODULE: ./pages/nextjs.png
       /* harmony default export */ const nextjs = {
         src: "/_next/static/media/nextjs.cae0b805.png",
@@ -969,12 +969,12 @@
       /***/
     },
 
-    /***/ 6828: /***/ (
+    /***/ 3132: /***/ (
       module,
       __unused_webpack_exports,
       __webpack_require__
     ) => {
-      module.exports = __webpack_require__(6660);
+      module.exports = __webpack_require__(260);
 
       /***/
     },
@@ -984,7 +984,7 @@
     /******/ var __webpack_exec__ = (moduleId) =>
       __webpack_require__((__webpack_require__.s = moduleId));
     /******/ __webpack_require__.O(0, [2888, 9774, 179], () =>
-      __webpack_exec__(1122)
+      __webpack_exec__(2058)
     );
     /******/ var __webpack_exports__ = __webpack_require__.O();
     /******/ _N_E = __webpack_exports__;

Diff for main-HASH.js

Diff too large to display

Commit: 881e950

ijjk · 2024-05-21T23:30:04Z

Tests Passed

arlyon

Sounds good to me. 100ms seems crazy high for me even for a spinning disk over usb2.0 but I guess it also felt crazy to bun before they had to up their thresholds...

bgw · 2024-05-22T17:02:42Z

Testing with a real 5400RPM USB 2.0 HDD shows that this benchmark doesn't really work. 635usecs is suspiciously low. Wikipedia shows that rotational latency should be about 5.5msecs. I'll see if I can make some tweaks to this benchmark to make it better (e.g. more likely to trigger seeks, less likely to only touch the the disk cache).

Matches the version in turbo, unbreaking our cargo lockfile syncing mess.

- Run the check 3 times. This should still be reasonably low overhead, while reducing noise. This also effectively lowers the per-file-creation threshold to an average of 33ms. - Call `sync_all` before closing the file. Closing a file on Linux does not guarantee an `fsync`, and is not representative of real performance. Bun used renames instead of just file creation in their check, and on most filesystems, that's probably enough to trigger a metadata sync of the file. - Actually write some very small amount of random data to the file. I don't expect this to do much, but it makes the check a little more realistic (not just file metadata).

bgw · 2024-05-22T23:29:18Z

I've made some tweaks: 881e950 . The big thing was an explicit call to sync_all.

With these changes, I was able to trigger the warning a few times (though not most of the time) with a real HDD.

The following tests are from a linux VM using virtiofs to connect to a 5400 RPM USB 2.0 HDD with APFS:

Only the .next is on an HDD (bind mount):
Otherwise idle disk: 4.86ms 4.44ms 5.31ms
Otherwise busy disk (copying files): 69.34ms 53.75ms 25.12ms

The whole project directory is on the HDD (more realistic):
Otherwise idle disk: 20.29ms 35.61ms 48.12ms
Otherwise busy disk (copying files): 131.40ms 21.71ms 87.33ms

ijjk added created-by: Turbopack team PRs by the turbopack team type: next labels May 21, 2024

bgw marked this pull request as ready for review May 21, 2024 23:28

bgw requested review from timneutkens, ijjk, shuding, huozhi and a team as code owners May 21, 2024 23:28

arlyon approved these changes May 22, 2024

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timneutkens approved these changes May 22, 2024

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bgw added 3 commits May 22, 2024 16:21

next-swc: Update from tokio 1.32.0 to 1.37.0

2db2e2a

Matches the version in turbo, unbreaking our cargo lockfile syncing mess.

feat(turbopack): Attempt to detect and warn about slow file IO

c483250

bgw force-pushed the bgw/slow-io branch from 5b2f65c to 881e950 Compare May 22, 2024 23:22

bgw changed the base branch from canary to bgw/tokio-1.37.0 May 22, 2024 23:22

bgw mentioned this pull request May 22, 2024

next-swc: Update from tokio 1.32.0 to 1.37.0 #66087

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Base automatically changed from bgw/tokio-1.37.0 to canary May 23, 2024 15:17

bgw merged commit 5017a41 into canary May 23, 2024
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bgw deleted the bgw/slow-io branch May 23, 2024 16:52

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feat(turbopack): Attempt to detect and warn about slow file IO #66057

feat(turbopack): Attempt to detect and warn about slow file IO #66057

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bgw commented May 22, 2024

feat(turbopack): Attempt to detect and warn about slow file IO #66057

feat(turbopack): Attempt to detect and warn about slow file IO #66057

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