chore(benchmarks): remove Vite 7 runner, update Next.js to 16.2.1

AGENTS.md

@@ -451,7 +451,7 @@ This repo currently resolves `vite` to `@voidzero-dev/vite-plus-core`, which bun
 - Prefer `oxc` over `esbuild` for new JavaScript transform config
 - Prefer `optimizeDeps.rolldownOptions` over `optimizeDeps.esbuildOptions`
 - Prefer `build.rolldownOptions` / `worker.rolldownOptions` over adding new `*.rollupOptions` config
-- When touching existing `build.rollupOptions` or `manualChunks`, preserve Vite 7 compatibility but treat them as migration targets, not patterns to copy forward
+- When touching existing `build.rollupOptions` or `manualChunks`, treat them as migration targets to Rolldown equivalents, not patterns to copy forward
 - If something breaks only on Vite 8, check the newer `build.target` baseline and stricter CommonJS default import behavior first
 
 ### Virtual Module Resolution Quirks

README.md

@@ -99,7 +99,7 @@ This will:
 
 The migration is non-destructive -- your existing Next.js setup continues to work alongside vinext. It does not modify `next.config`, `tsconfig.json`, or any source files, and it does not remove Next.js dependencies.
 
-vinext supports both Vite 7 and Vite 8. If you bring custom Vite config or plugins from an older setup, note that Vite 8 now defaults to Rolldown, Oxc, Lightning CSS, and a newer browser baseline. Prefer `oxc`, `optimizeDeps.rolldownOptions`, and `build.rolldownOptions` over older `esbuild` and `build.rollupOptions` knobs, and override `build.target` if you still need older browsers. If a dependency only breaks on Vite 8 because of stricter CommonJS default import handling, fix the import or use `legacy.inconsistentCjsInterop: true` as a temporary escape hatch. See the [Vite 8 migration guide](https://vite.dev/guide/migration).
+vinext targets Vite 8, which defaults to Rolldown, Oxc, Lightning CSS, and a newer browser baseline. If you bring custom Vite config or plugins from an older setup, prefer `oxc`, `optimizeDeps.rolldownOptions`, and `build.rolldownOptions` over older `esbuild` and `build.rollupOptions` knobs, and override `build.target` if you still need older browsers. If a dependency breaks because of stricter CommonJS default import handling, fix the import or use `legacy.inconsistentCjsInterop: true` as a temporary escape hatch. See the [Vite 8 migration guide](https://vite.dev/guide/migration).
 
 ```bash
 npm run dev:vinext    # Start the vinext dev server (port 3001)
@@ -556,7 +556,7 @@ These are intentional exclusions:
 
 These benchmarks measure **compilation and bundling speed**, not production serving performance. Next.js and vinext have fundamentally different default approaches: Next.js statically pre-renders pages at build time (making builds slower but production serving faster for static content), while vinext server-renders all pages on each request. To make the comparison apples-to-apples, the benchmark app uses `export const dynamic = "force-dynamic"` to disable Next.js static pre-rendering — both frameworks are doing the same work: compiling, bundling, and preparing server-rendered routes.
 
-The benchmark app is a shared 33-route App Router application (server components, client components, dynamic routes, nested layouts, API routes) built identically by both tools. We compare Next.js 16 (Turbopack) against vinext on both Vite 7 (Rollup) and Vite 8 (Rolldown). Turbopack and Rolldown both parallelize across cores, so results on machines with more cores may differ significantly.
+The benchmark app is a shared 33-route App Router application (server components, client components, dynamic routes, nested layouts, API routes) built identically by both tools. We compare Next.js (Turbopack) against vinext (Vite 8). Both Turbopack and Rolldown parallelize across cores, so results on machines with more cores may differ significantly.
 
 We measure three things:
 

benchmarks/.gitignore

@@ -4,22 +4,18 @@ app/
 # Copies of shared app in each project (generated by generate-app.mjs)
 nextjs/app/
 vinext/app/
-vinext-rolldown/app/
 
 # Build outputs
 nextjs/.next/
 vinext/dist/
-vinext-rolldown/dist/
 
 # Dependencies (each project has its own)
 nextjs/node_modules/
 vinext/node_modules/
-vinext-rolldown/node_modules/
 
 # Lock files
 nextjs/package-lock.json
 vinext/package-lock.json
-vinext-rolldown/package-lock.json
 
 # Next.js generated files
 nextjs/next-env.d.ts

benchmarks/generate-app.mjs

@@ -577,7 +577,7 @@ console.log(
 // Copy to each benchmark project (symlinks don't work with Turbopack)
 import { cpSync } from "node:fs";
 const BASE = dirname(new URL(import.meta.url).pathname);
-for (const project of ["nextjs", "vinext", "vinext-rolldown"]) {
+for (const project of ["nextjs", "vinext"]) {
   const dest = join(BASE, project, "app");
   rmSync(dest, { recursive: true, force: true });
   cpSync(APP, dest, { recursive: true });

benchmarks/nextjs/package.json

@@ -7,7 +7,7 @@
     "start": "next start"
   },
   "dependencies": {
-    "next": "16.1.7",
+    "next": "16.2.1",
     "react": "19.2.4",
     "react-dom": "19.2.4"
   }

benchmarks/run.mjs

@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 /**
- * Benchmark harness: compares Next.js 16 (Turbopack) vs vinext (Vite 7/Rollup) vs vinext (Vite 8/Rolldown)
+ * Benchmark harness: compares Next.js (Turbopack) vs vinext (Vite 8)
  *
  * Metrics:
  *   1. Production build time (hyperfine)
@@ -10,7 +10,7 @@
  *   5. Memory usage (peak RSS during build and dev)
  *
  * Prerequisites: hyperfine, autocannon (npm i -g autocannon)
- * Usage: node benchmarks/run.mjs [--runs N] [--dev-runs N] [--skip-build] [--skip-dev] [--skip-ssr] [--skip-rolldown]
+ * Usage: node benchmarks/run.mjs [--runs N] [--dev-runs N] [--skip-build] [--skip-dev] [--skip-ssr]
  */
 
 import { execSync, spawn } from "node:child_process";
@@ -33,7 +33,6 @@ const DEV_RUNS = parseInt(args.find((a) => a.startsWith("--dev-runs="))?.split("
 const SKIP_BUILD = args.includes("--skip-build");
 const SKIP_DEV = args.includes("--skip-dev");
 const SKIP_SSR = args.includes("--skip-ssr");
-const SKIP_ROLLDOWN = args.includes("--skip-rolldown");
 
 // ─── Helpers ───────────────────────────────────────────────────────────────────
 function exec(cmd, opts = {}) {
@@ -228,13 +227,10 @@ async function main() {
     },
     nextjs: {},
     vinext: {},
-    vinextRolldown: {},
   };
 
   const nextjsDir = join(__dirname, "nextjs");
   const vinextDir = join(__dirname, "vinext");
-  const vinextRolldownDir = join(__dirname, "vinext-rolldown");
-  const hasRolldown = !SKIP_ROLLDOWN && existsSync(join(vinextRolldownDir, "package.json"));
 
   // Detect actual installed versions for reproducibility
   try {
@@ -253,16 +249,6 @@ async function main() {
   } catch {
     /* deps not installed yet */
   }
-  if (hasRolldown) {
-    try {
-      const rdPkg = JSON.parse(
-        readFileSync(join(vinextRolldownDir, "node_modules", "vite", "package.json"), "utf-8"),
-      );
-      results.system.viteRolldownVersion = rdPkg.version;
-    } catch {
-      /* deps not installed yet */
-    }
-  }
 
   // ─── 1. Production Build Time ──────────────────────────────────────────────
   if (!SKIP_BUILD) {
@@ -271,7 +257,6 @@ async function main() {
     // Clean previous builds
     exec("rm -rf .next", { cwd: nextjsDir });
     exec("rm -rf dist", { cwd: vinextDir });
-    if (hasRolldown) exec("rm -rf dist", { cwd: vinextRolldownDir });
 
     // Ensure plugin is built
     console.log("  Building vinext plugin...");
@@ -284,16 +269,10 @@ async function main() {
     exec("./node_modules/.bin/next build --turbopack", { cwd: nextjsDir, timeout: 120000 });
     exec("rm -rf .next", { cwd: nextjsDir });
 
-    console.log("  Warmup: vinext (Rollup) build...");
+    console.log("  Warmup: vinext build...");
     exec("./node_modules/.bin/vp build", { cwd: vinextDir, timeout: 120000 });
     exec("rm -rf dist", { cwd: vinextDir });
 
-    if (hasRolldown) {
-      console.log("  Warmup: vinext (Rolldown) build...");
-      exec("./node_modules/.bin/vp build", { cwd: vinextRolldownDir, timeout: 120000 });
-      exec("rm -rf dist", { cwd: vinextRolldownDir });
-    }
-
     // Measured runs with hyperfine (single invocation with --shuffle for fair ordering)
     console.log(`\n  Running ${RUNS} build iterations with hyperfine (randomized order)...\n`);
 
@@ -314,11 +293,6 @@ async function main() {
         `--command-name nextjs 'rm -rf ${nextjsDir}/.next && ./node_modules/.bin/next build --turbopack'`,
         `--command-name vinext 'cd ${vinextDir} && rm -rf dist && ./node_modules/.bin/vp build'`,
       ];
-      if (hasRolldown) {
-        cmds.push(
-          `--command-name rolldown 'cd ${vinextRolldownDir} && rm -rf dist && ./node_modules/.bin/vp build'`,
-        );
-      }
 
       console.log("  Timing all builds (shuffled)...");
       const hfJson = exec(
@@ -333,15 +307,13 @@ async function main() {
           results.nextjs.buildTime = parseHyperfineResult(r);
         } else if (r.command.includes(vinextDir)) {
           results.vinext.buildTime = parseHyperfineResult(r);
-        } else if (hasRolldown && r.command.includes(vinextRolldownDir)) {
-          results.vinextRolldown.buildTime = parseHyperfineResult(r);
         }
       }
       results.buildMethodology = "hyperfine --shuffle (randomized)";
     } catch {
       // Fallback: manual timing with randomized runner order to eliminate positional bias
       console.log("  hyperfine failed, falling back to manual timing...");
-      const buildTimes = { nextjs: [], vinext: [], rolldown: [] };
+      const buildTimes = { nextjs: [], vinext: [] };
 
       const buildRunners = [
         {
@@ -362,22 +334,6 @@ async function main() {
             buildTimes.vinext.push(performance.now() - start);
           },
         },
-        ...(hasRolldown
-          ? [
-              {
-                key: "rolldown",
-                run: () => {
-                  exec("rm -rf dist", { cwd: vinextRolldownDir });
-                  const start = performance.now();
-                  exec("./node_modules/.bin/vp build", {
-                    cwd: vinextRolldownDir,
-                    timeout: 120000,
-                  });
-                  buildTimes.rolldown.push(performance.now() - start);
-                },
-              },
-            ]
-          : []),
       ];
 
       const buildRunOrders = [];
@@ -407,14 +363,6 @@ async function main() {
         min: Math.min(...buildTimes.vinext),
         max: Math.max(...buildTimes.vinext),
       };
-      if (hasRolldown && buildTimes.rolldown.length) {
-        results.vinextRolldown.buildTime = {
-          mean: avg(buildTimes.rolldown),
-          stddev: stddev(buildTimes.rolldown),
-          min: Math.min(...buildTimes.rolldown),
-          max: Math.max(...buildTimes.rolldown),
-        };
-      }
       results.buildMethodology = "manual timing (randomized)";
       results.buildRunOrders = buildRunOrders;
     }
@@ -441,30 +389,19 @@ async function main() {
       `  Next.js:     ${njsSize.files} files, ${formatBytes(njsSize.raw)} raw, ${formatBytes(njsSize.gzip)} gzip`,
     );
 
-    // vinext (Rollup): client bundles are in dist/client
+    // vinext: client bundles are in dist/client
     const ncSize = bundleSize(join(vinextDir, "dist", "client"));
     results.vinext.bundleSize = ncSize;
     console.log(
-      `  vinext (Rollup):    ${ncSize.files} files, ${formatBytes(ncSize.raw)} raw, ${formatBytes(ncSize.gzip)} gzip`,
+      `  vinext:      ${ncSize.files} files, ${formatBytes(ncSize.raw)} raw, ${formatBytes(ncSize.gzip)} gzip`,
     );
-
-    // vinext (Rolldown): client bundles are in dist/client
-    if (hasRolldown) {
-      exec("rm -rf dist", { cwd: vinextRolldownDir });
-      exec("./node_modules/.bin/vp build", { cwd: vinextRolldownDir, timeout: 120000 });
-      const rdSize = bundleSize(join(vinextRolldownDir, "dist", "client"));
-      results.vinextRolldown.bundleSize = rdSize;
-      console.log(
-        `  vinext (Rolldown):  ${rdSize.files} files, ${formatBytes(rdSize.raw)} raw, ${formatBytes(rdSize.gzip)} gzip`,
-      );
-    }
   }
 
   // ─── 3. Dev Server Cold Start ──────────────────────────────────────────────
   if (!SKIP_DEV) {
     console.log("\n=== Dev Server Cold Start ===\n");
 
-    const devResults = { nextjs: [], vinext: [], rolldown: [] };
+    const devResults = { nextjs: [], vinext: [] };
 
     // Define the runners; order is randomized each iteration to eliminate
     // positional bias (first-after-kill penalties, OS cache warming, etc.)
@@ -484,7 +421,7 @@ async function main() {
       },
       {
         key: "vinext",
-        label: "vinext (Rollup)",
+        label: "vinext",
         run: async () => {
           exec("rm -rf node_modules/.vite", { cwd: vinextDir });
           return startAndMeasure(
@@ -495,23 +432,6 @@ async function main() {
           );
         },
       },
-      ...(hasRolldown
-        ? [
-            {
-              key: "rolldown",
-              label: "vinext (Rolldown)",
-              run: async () => {
-                exec("rm -rf node_modules/.vite", { cwd: vinextRolldownDir });
-                return startAndMeasure(
-                  "./node_modules/.bin/vp",
-                  ["dev", "--port", "4102"],
-                  vinextRolldownDir,
-                  "http://localhost:4102",
-                );
-              },
-            },
-          ]
-        : []),
     ];
 
     const runOrders = [];
@@ -549,13 +469,6 @@ async function main() {
       meanRssKb: avg(devResults.vinext.map((r) => r.peakRssKb)),
       runs: devResults.vinext,
     };
-    if (hasRolldown && devResults.rolldown.length) {
-      results.vinextRolldown.devColdStart = {
-        meanMs: avg(devResults.rolldown.map((r) => r.coldStartMs)),
-        meanRssKb: avg(devResults.rolldown.map((r) => r.peakRssKb)),
-        runs: devResults.rolldown,
-      };
-    }
     results.devRunOrders = runOrders;
   }
 
@@ -586,16 +499,11 @@ async function main() {
   md += `- **Build runs**: ${results.buildRuns}\n`;
   md += `- **Dev cold start runs**: ${results.devRuns}\n`;
   if (results.system.nextjsVersion) md += `- **Next.js**: ${results.system.nextjsVersion}\n`;
-  if (results.system.viteVersion) md += `- **Vite (Rollup)**: ${results.system.viteVersion}\n`;
-  if (results.system.viteRolldownVersion)
-    md += `- **Vite (Rolldown)**: ${results.system.viteRolldownVersion}\n`;
+  if (results.system.viteVersion) md += `- **Vite**: ${results.system.viteVersion}\n`;
   md += "\n";
   md += `> **Note:** TypeScript type checking is disabled for the Next.js build (\`typescript.ignoreBuildErrors: true\`) so that build timings measure bundler/compilation speed only. Vite does not type-check during build.\n\n`;
   md += `> **Methodology:** Build and dev cold start runs are executed in randomized order to eliminate positional bias from filesystem caches, CPU thermal state, and residual process state.\n\n`;
 
-  const hasRolldownResults =
-    results.vinextRolldown && Object.keys(results.vinextRolldown).length > 0;
-
   // Format a speed ratio comparison: "2.1x faster" or "1.3x slower"
   function fmtSpeedup(baseline, value) {
     if (!baseline || !value) return "N/A";
@@ -617,38 +525,26 @@ async function main() {
     md += `## Production Build Time\n\n`;
     md += `| Framework | Mean | StdDev | Min | Max | vs Next.js |\n`;
     md += `|-----------|------|--------|-----|-----|------------|\n`;
-    md += `| Next.js 16 (Turbopack) | ${formatMs(results.nextjs.buildTime.mean)} | ±${formatMs(results.nextjs.buildTime.stddev)} | ${formatMs(results.nextjs.buildTime.min)} | ${formatMs(results.nextjs.buildTime.max)} | baseline |\n`;
-    md += `| vinext (Vite 7 / Rollup) | ${formatMs(results.vinext.buildTime.mean)} | ±${formatMs(results.vinext.buildTime.stddev)} | ${formatMs(results.vinext.buildTime.min)} | ${formatMs(results.vinext.buildTime.max)} | ${fmtSpeedup(results.nextjs.buildTime.mean, results.vinext.buildTime.mean)} |\n`;
-
-    if (hasRolldownResults && results.vinextRolldown.buildTime) {
-      md += `| vinext (Vite 8 / Rolldown) | ${formatMs(results.vinextRolldown.buildTime.mean)} | ±${formatMs(results.vinextRolldown.buildTime.stddev)} | ${formatMs(results.vinextRolldown.buildTime.min)} | ${formatMs(results.vinextRolldown.buildTime.max)} | ${fmtSpeedup(results.nextjs.buildTime.mean, results.vinextRolldown.buildTime.mean)} |\n`;
-    }
+    md += `| Next.js (Turbopack) | ${formatMs(results.nextjs.buildTime.mean)} | ±${formatMs(results.nextjs.buildTime.stddev)} | ${formatMs(results.nextjs.buildTime.min)} | ${formatMs(results.nextjs.buildTime.max)} | baseline |\n`;
+    md += `| vinext (Vite 8) | ${formatMs(results.vinext.buildTime.mean)} | ±${formatMs(results.vinext.buildTime.stddev)} | ${formatMs(results.vinext.buildTime.min)} | ${formatMs(results.vinext.buildTime.max)} | ${fmtSpeedup(results.nextjs.buildTime.mean, results.vinext.buildTime.mean)} |\n`;
     md += "\n";
   }
 
   if (results.nextjs.bundleSize && results.vinext.bundleSize) {
     md += `## Production Bundle Size (Client)\n\n`;
     md += `| Framework | Files | Raw | Gzipped | vs Next.js (gzip) |\n`;
     md += `|-----------|-------|-----|----------|--------------------|\n`;
-    md += `| Next.js 16 | ${results.nextjs.bundleSize.files} | ${formatBytes(results.nextjs.bundleSize.raw)} | ${formatBytes(results.nextjs.bundleSize.gzip)} | baseline |\n`;
-    md += `| vinext (Rollup) | ${results.vinext.bundleSize.files} | ${formatBytes(results.vinext.bundleSize.raw)} | ${formatBytes(results.vinext.bundleSize.gzip)} | ${fmtSizeReduction(results.nextjs.bundleSize.gzip, results.vinext.bundleSize.gzip)} |\n`;
-
-    if (hasRolldownResults && results.vinextRolldown.bundleSize) {
-      md += `| vinext (Rolldown) | ${results.vinextRolldown.bundleSize.files} | ${formatBytes(results.vinextRolldown.bundleSize.raw)} | ${formatBytes(results.vinextRolldown.bundleSize.gzip)} | ${fmtSizeReduction(results.nextjs.bundleSize.gzip, results.vinextRolldown.bundleSize.gzip)} |\n`;
-    }
+    md += `| Next.js (Turbopack) | ${results.nextjs.bundleSize.files} | ${formatBytes(results.nextjs.bundleSize.raw)} | ${formatBytes(results.nextjs.bundleSize.gzip)} | baseline |\n`;
+    md += `| vinext (Vite 8) | ${results.vinext.bundleSize.files} | ${formatBytes(results.vinext.bundleSize.raw)} | ${formatBytes(results.vinext.bundleSize.gzip)} | ${fmtSizeReduction(results.nextjs.bundleSize.gzip, results.vinext.bundleSize.gzip)} |\n`;
     md += "\n";
   }
 
   if (results.nextjs.devColdStart && results.vinext.devColdStart) {
     md += `## Dev Server Cold Start\n\n`;
     md += `| Framework | Mean Cold Start | Mean Peak RSS | vs Next.js |\n`;
     md += `|-----------|----------------|----------------|------------|\n`;
-    md += `| Next.js 16 (Turbopack) | ${formatMs(results.nextjs.devColdStart.meanMs)} | ${Math.round(results.nextjs.devColdStart.meanRssKb / 1024)} MB | baseline |\n`;
-    md += `| vinext (Vite 7 / Rollup) | ${formatMs(results.vinext.devColdStart.meanMs)} | ${Math.round(results.vinext.devColdStart.meanRssKb / 1024)} MB | ${fmtSpeedup(results.nextjs.devColdStart.meanMs, results.vinext.devColdStart.meanMs)} |\n`;
-
-    if (hasRolldownResults && results.vinextRolldown.devColdStart) {
-      md += `| vinext (Vite 8 / Rolldown) | ${formatMs(results.vinextRolldown.devColdStart.meanMs)} | ${Math.round(results.vinextRolldown.devColdStart.meanRssKb / 1024)} MB | ${fmtSpeedup(results.nextjs.devColdStart.meanMs, results.vinextRolldown.devColdStart.meanMs)} |\n`;
-    }
+    md += `| Next.js (Turbopack) | ${formatMs(results.nextjs.devColdStart.meanMs)} | ${Math.round(results.nextjs.devColdStart.meanRssKb / 1024)} MB | baseline |\n`;
+    md += `| vinext (Vite 8) | ${formatMs(results.vinext.devColdStart.meanMs)} | ${Math.round(results.vinext.devColdStart.meanRssKb / 1024)} MB | ${fmtSpeedup(results.nextjs.devColdStart.meanMs, results.vinext.devColdStart.meanMs)} |\n`;
     md += "\n";
   }