Add performance gate for 1.0

.github/workflows/ci.yml

@@ -85,7 +85,10 @@ jobs:
 
   playwright-smoke:
     runs-on: ubuntu-22.04
-    needs: test
+    needs: [lint, test]
+    timeout-minutes: 30
+    container:
+      image: mcr.microsoft.com/playwright:v1.38.0-jammy
 
     steps:
       - uses: actions/checkout@v4
@@ -96,19 +99,57 @@ jobs:
       - name: Set node
         uses: actions/setup-node@v4
         with:
-          node-version: lts/*
+          node-version: 22
           cache: pnpm
 
       - run: corepack enable
 
       - name: Install
         run: pnpm install --frozen-lockfile
 
-      - name: Install Playwright Chromium
-        run: pnpm exec playwright install --with-deps chromium
-
       - name: Diff smoke
         run: pnpm smoke:diff
 
       - name: Height stability smoke
         run: pnpm smoke:height-stability
+
+  performance-gate:
+    runs-on: ubuntu-22.04
+    needs: [playwright-smoke]
+    timeout-minutes: 30
+    container:
+      image: mcr.microsoft.com/playwright:v1.38.0-jammy
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+
+      - name: Set node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: pnpm
+
+      - run: corepack enable
+
+      - name: Install
+        run: pnpm install --frozen-lockfile
+
+      - name: Performance gate
+        run: pnpm perf:gate:ci
+
+      - name: Analyze performance report
+        if: always()
+        run: pnpm perf:analyze || true
+
+      - name: Upload performance report
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: stream-monaco-performance-report
+          path: .perf/*
+          if-no-files-found: ignore
+          include-hidden-files: true
+          retention-days: 14

.github/workflows/release.yml

@@ -11,34 +11,38 @@ on:
 
 jobs:
   release:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
+    container:
+      image: mcr.microsoft.com/playwright:v1.38.0-jammy
+    env:
+      NPM_TOKEN_PRESENT: ${{ secrets.NPM_TOKEN != '' }}
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: pnpm/action-setup@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: lts/*
+          # Keep the release runner aligned with CI performance-gate. The perf
+          # gate imports Vite 7, which requires a modern Node runtime.
+          node-version: 24
           cache: pnpm
           registry-url: https://registry.npmjs.org/
 
       - run: corepack enable
 
       - run: pnpm install --frozen-lockfile
 
-      - run: pnpm build
-
-      - run: pnpm vitest run
-
-      - run: pnpm typecheck
+      - run: pnpm release:verify
 
       - run: pnpm dlx changelogithub
         env:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
 
-      - run: pnpm publish --no-git-checks --access public
-        if: ${{ secrets.NPM_TOKEN != '' }}
+      # release:verify has already run above. package.json also has
+      # prepublishOnly=pnpm release:verify, so publish must not run it again.
+      - run: pnpm publish --ignore-scripts --no-git-checks --access public
+        if: env.NPM_TOKEN_PRESENT == 'true'
         env:
           NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}
           NPM_CONFIG_PROVENANCE: true

.gitignore

@@ -13,4 +13,6 @@ logs
 *-error.log
 .eslintcache
 tmp
-
+.perf/
+scripts/.perf-app/
+scripts/performance-baseline.json

package.json

@@ -80,12 +80,23 @@
     "format": "prettier --write --cache .",
     "lint": "eslint . --cache",
     "lint:fix": "pnpm run lint --fix",
-    "prepublishOnly": "pnpm build",
+    "prepublishOnly": "pnpm release:verify",
     "release": "bumpp --tag \"v%s\"",
-    "publish:package": "pnpm build && npm publish",
+    "publish:package": "pnpm release:verify && npm publish --ignore-scripts",
     "start": "esno src/index.ts",
     "bench": "node scripts/stream-benchmark.mjs",
     "bench:playwright": "node scripts/playwright-bench.mjs",
+    "perf:report": "pnpm build && node scripts/playwright-performance-gate.mjs --entry=dist --report-only",
+    "perf:gate": "pnpm perf:gate:ci",
+    "perf:gate:ci": "pnpm perf:gate:canary",
+    "perf:gate:canary": "pnpm build && node scripts/playwright-performance-gate.mjs --entry=dist --skip-baseline --repeat=1 --scenarios=editor-cold-first-highlight,editor-update-highlight,editor-stream-append-burst,diff-cold-first-highlight-no-unchanged-regions,diff-update-highlight,diff-stream-append-burst",
+    "perf:gate:budget": "pnpm perf:gate:ci",
+    "perf:gate:baseline": "pnpm build && node scripts/playwright-performance-gate.mjs --entry=dist --require-baseline",
+    "perf:gate:release": "pnpm build && node scripts/playwright-performance-gate.mjs --entry=dist --skip-baseline --repeat=2",
+    "perf:gate:src": "node scripts/playwright-performance-gate.mjs --entry=src",
+    "perf:baseline": "pnpm build && node scripts/playwright-performance-gate.mjs --entry=dist --repeat=3 --update-baseline",
+    "perf:analyze": "node scripts/analyze-performance-report.mjs",
+    "release:verify": "node scripts/release-verify.mjs",
     "smoke:diff": "node scripts/playwright-diff-smoke.mjs",
     "smoke:height-stability": "node scripts/playwright-height-stability-smoke.mjs",
     "shot:diff-ux": "node scripts/playwright-diff-ux-shot.mjs",
@@ -123,6 +134,7 @@
     "tsdown": "^0.12.9",
     "tsx": "^3.14.0",
     "typescript": "^5.9.3",
+    "vite": "^7.3.3",
     "vitest": "^3.2.4"
   },
   "lint-staged": {