chore: track bundle sizes in Amplitude

.github/workflows/ci-nx.yml

@@ -47,6 +47,41 @@ jobs:
       - name: Build docs
         run: pnpm docs:check
 
+  check-size-limits:
+    name: Check Size Limits
+    runs-on: ubuntu-latest
+    env:
+      NX_BASE: ${{ github.event_name == 'pull_request' && github.event.pull_request.base.sha || 'origin/main~1' }}
+      NX_HEAD: ${{ github.sha }}
+    steps:
+      - name: Check out git repository
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
+        with:
+          fetch-depth: 0
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@b906affcce14559ad1aafd4ab0e942779e9f58b1 # v4
+
+      - name: Setup Node.js 24
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        with:
+          node-version: 24
+          cache: 'pnpm'
+
+      - name: Restore Nx cache
+        uses: actions/cache/restore@d4323d4df104b026a6aa633fdb11d772146be0bf # v4
+        with:
+          path: .nx/cache
+          key: nx-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml', 'nx.json') }}
+          restore-keys: |
+            nx-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml', 'nx.json') }}
+
+      - uses: daniel-statsig/size-limit-action@710d41ebc34634c011e8a91fe165d6ff49536a74 # v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          package_manager: pnpm
+          build_script: build:nx
+
   build:
     name: Build
     strategy:

.github/workflows/main-branch-push.yml

@@ -0,0 +1,46 @@
+# Runs on every push to main (for example after a PR merge). Extend with jobs as needed.
+name: Main branch push
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  cache-builds:
+    name: On push to main
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out git repository
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
+        with:
+          fetch-depth: 0
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@b906affcce14559ad1aafd4ab0e942779e9f58b1 # v4
+
+      - name: Setup Node.js 24
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        with:
+          node-version: 24
+          cache: 'pnpm'
+
+      - name: Install project dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Restore Nx cache
+        uses: actions/cache/restore@d4323d4df104b026a6aa633fdb11d772146be0bf # v4
+        with:
+          path: .nx/cache
+          key: nx-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml', 'nx.json') }}
+          restore-keys: |
+            nx-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml', 'nx.json') }}
+
+      - name: Build all packages
+        run: pnpm build:nx
+
+      - name: Save Nx cache
+        uses: actions/cache/save@d4323d4df104b026a6aa633fdb11d772146be0bf # v4
+        with:
+          path: .nx/cache
+          key: nx-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml', 'nx.json') }}

.github/workflows/publish-v2.yml

@@ -248,3 +248,10 @@ jobs:
           DRY_RUN: true
         run: |
           pnpm deploy:publish:dry-run
+
+      # Report bundle size to Amplitude
+      - name: Report bundle size to Amplitude
+        env:
+          AMPLITUDE_API_KEY: ${{ secrets.AMPLITUDE_API_KEY }}
+        run: |
+          node ./scripts/report-bundle-size.js

.size-limit.js

@@ -0,0 +1,28 @@
+const limits = [
+  {
+    // analytics-browser bundle
+    packageJsonPath: './packages/analytics-browser/package.json',
+    path: `./packages/analytics-browser/lib/scripts/amplitude-min.js.gz`,
+    name: 'analytics-browser.min.js.gz',
+    limit: '65kb',
+    brotli: false,
+  },
+  {
+    // session-replay standalone bundle
+    packageJsonPath: './packages/session-replay-browser/package.json',
+    path: `./packages/session-replay-browser/lib/scripts/session-replay-browser-min.js.gz`,
+    name: 'session-replay-browser.min.js.gz',
+    limit: '150kb',
+    brotli: false,
+  },
+  {
+    // unified SDK bundle
+    packageJsonPath: './packages/unified/package.json',
+    path: `./packages/unified/lib/scripts/amplitude-min.umd.js.gz`,
+    name: 'unified.min.umd.js.gz',
+    limit: '225kb',
+    brotli: false,
+  },
+]
+
+module.exports = limits;

nx.json

@@ -5,6 +5,7 @@
     "build": {
       "dependsOn": ["^build"],
       "inputs": ["production", "^production"],
+      "outputs": ["{projectRoot}/lib/**"],
       "cache": true
     },
     "test": {

package.json

@@ -5,6 +5,7 @@
   ],
   "scripts": {
     "build": "lerna run build --stream --include-dependencies --skip-nx-cache",
+    "build:nx": "nx run-many --target=build --all",
     "build:vite": "rm -rf ./test-server/dist/ && vite build",
     "build:nx-affected": "nx affected --target=build",
     "watch": "nx run-many --target=watch --all --parallel 9999 --output-style=stream --maxParallel=0",
@@ -52,6 +53,7 @@
     "@commitlint/config-conventional": "^17.3.0",
     "@nx/workspace": "^21.2.1",
     "@playwright/test": "1.55.0",
+    "@size-limit/file": "^12.1.0",
     "@types/jest": "^29.2.4",
     "@types/node": "^18.11.14",
     "@typescript-eslint/eslint-plugin": "^5.46.1",
@@ -80,6 +82,7 @@
     "nx": "^21.2.1",
     "prettier": "^2.8.1",
     "rimraf": "^3.0.2",
+    "size-limit": "^12.1.0",
     "source-map": "^0.7.4",
     "ts-jest": "^29.0.3",
     "tslib": "^2.4.1",