diff --git a/.github/workflows/performance.yml b/.github/workflows/performance.yml
index e3e3b694..57c521b5 100644
--- a/.github/workflows/performance.yml
+++ b/.github/workflows/performance.yml
@@ -3,26 +3,51 @@ name: performance
 on: [pull_request]
 
 jobs:
-  runtime-size:
-    name: runtime-size
+  size:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: necolas/compressed-size-action@master
-        with:
-          name: 'runtime library'
-          build-script: 'build -w @stylexjs/stylex'
-          pattern: './packages/stylex/lib/{stylex.js,StyleXSheet.js}'
-          repo-token: '${{ secrets.GITHUB_TOKEN }}'
-
-  bundle-size:
-    name: bundle-size
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: necolas/compressed-size-action@master
-        with:
-          name: 'e2e bundles'
-          build-script: 'build'
-          pattern: './apps/rollup-example/.build/{stylex.css,bundle.js}'
-          repo-token: '${{ secrets.GITHUB_TOKEN }}'
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 50
+    - uses: actions/setup-node@v4
+      with:
+        node-version: '20.x'
+    - name: 'Setup temporary files'
+      run: |
+        echo "BASE_JSON=$(mktemp)" >> $GITHUB_ENV
+        echo "PATCH_JSON=$(mktemp)" >> $GITHUB_ENV
+    - name: 'Benchmark base'
+      run: |
+        git checkout -f ${{ github.event.pull_request.base.sha }}
+        npm install --loglevel error
+        if npm run size -w @stylexjs/scripts -- -o ${{ env.BASE_JSON }}; then
+          echo "Ran successfully on base branch"
+        else
+          echo "{}" > ${{ env.BASE_JSON }}  # Empty JSON as default
+          echo "Benchmark script not found on base branch, using default values"
+        fi
+    - name: 'Benchmark patch'
+      run: |
+        git checkout -f ${{ github.event.pull_request.head.sha }}
+        npm install --loglevel error
+        npm run size -w @stylexjs/scripts -- -o ${{ env.PATCH_JSON }}
+        echo "Ran successfully on patch branch"
+    - name: 'Collect results'
+      id: collect
+      run: |
+        echo "table<<EOF" >> $GITHUB_OUTPUT
+        npm run size:compare -w @stylexjs/scripts -- ${{ env.BASE_JSON }} ${{ env.PATCH_JSON }} >> markdown
+        cat markdown >> $GITHUB_OUTPUT
+        echo "EOF" >> $GITHUB_OUTPUT
+    - name: 'Post comment'
+      uses: edumserrano/find-create-or-update-comment@v3
+      with:
+        issue-number: ${{ github.event.pull_request.number }}
+        body-includes: '<!-- workflow-benchmarks-size-data -->'
+        comment-author: 'github-actions[bot]'
+        body: |
+          <!-- workflow-benchmarks-size-data -->
+          ### workflow: benchmarks/size
+          Comparison of minified (terser) and compressed (brotli) size results, measured in bytes. Smaller is better.
+          ${{ steps.collect.outputs.table }}
+        edit-mode: replace
diff --git a/package-lock.json b/package-lock.json
index 7cda55e6..75fa1004 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7,7 +7,6 @@
     "": {
       "name": "stylex-monorepo",
       "version": "0.7.5",
-      "hasInstallScript": true,
       "license": "MIT",
       "workspaces": [
         "packages/shared",
@@ -229,18 +228,6 @@
         "node": ">=4"
       }
     },
-    "apps/docs/node_modules/clean-css": {
-      "version": "5.3.2",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.2.tgz",
-      "integrity": "sha512-JVJbM+f3d3Q704rF4bqQ5UUyTtuJ0JRKNbTKVEeujCCBoMdkEi+V+e8oktO9qGQNSvHrFTM6JZRXrUvGR1czww==",
-      "dev": true,
-      "dependencies": {
-        "source-map": "~0.6.0"
-      },
-      "engines": {
-        "node": ">= 10.0"
-      }
-    },
     "apps/docs/node_modules/debug": {
       "version": "3.2.7",
       "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.7.tgz",
@@ -10054,6 +10041,22 @@
         "node": ">=8"
       }
     },
+    "node_modules/brotli-size": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/brotli-size/-/brotli-size-4.0.0.tgz",
+      "integrity": "sha512-uA9fOtlTRC0iqKfzff1W34DXUA3GyVqbUaeo3Rw3d4gd1eavKVCETXrn3NzO74W+UVkG3UHu8WxUi+XvKI/huA==",
+      "dependencies": {
+        "duplexer": "0.1.1"
+      },
+      "engines": {
+        "node": ">= 10.16.0"
+      }
+    },
+    "node_modules/brotli-size/node_modules/duplexer": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/duplexer/-/duplexer-0.1.1.tgz",
+      "integrity": "sha512-sxNZ+ljy+RA1maXoUReeqBBpBC6RLKmg5ewzV+x+mSETmWNoKdZN6vcQjpFROemza23hGFskJtFNoUWUaQ+R4Q=="
+    },
     "node_modules/browserslist": {
       "version": "4.23.0",
       "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.23.0.tgz",
@@ -10398,9 +10401,9 @@
       "dev": true
     },
     "node_modules/clean-css": {
-      "version": "5.3.1",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.1.tgz",
-      "integrity": "sha512-lCr8OHhiWCTw4v8POJovCoh4T7I9U11yVsPjMWWnnMmp9ZowCxyad1Pathle/9HjaDp+fdQKjO9fQydE6RHTZg==",
+      "version": "5.3.3",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.3.tgz",
+      "integrity": "sha512-D5J+kHaVb/wKSFcyyV75uCn8fiY4sV38XJoe4CUyGQ+mOU/fMVYUdH1hJC+CJQ5uY3EnW27SbJYS4X8BiLrAFg==",
       "dependencies": {
         "source-map": "~0.6.0"
       },
@@ -29193,9 +29196,9 @@
       }
     },
     "node_modules/terser": {
-      "version": "5.19.2",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-5.19.2.tgz",
-      "integrity": "sha512-qC5+dmecKJA4cpYxRa5aVkKehYsQKc+AHeKl0Oe62aYjBL8ZA33tTljktDHJSaxxMnbI5ZYw+o/S2DxxLu8OfA==",
+      "version": "5.31.6",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-5.31.6.tgz",
+      "integrity": "sha512-PQ4DAriWzKj+qgehQ7LK5bQqCFNMmlhjR2PFFLuqGCpuCAauxemVBWwWOxo3UIwWQx8+Pr61Df++r76wDmkQBg==",
       "dependencies": {
         "@jridgewell/source-map": "^0.3.3",
         "acorn": "^8.8.2",
@@ -31538,7 +31541,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "darwin"
@@ -31554,7 +31556,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "darwin"
@@ -31570,7 +31571,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -31586,7 +31586,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -31602,7 +31601,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -31618,7 +31616,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -31634,7 +31631,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "win32"
@@ -31650,7 +31646,6 @@
       "cpu": [
         "ia32"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "win32"
@@ -31666,7 +31661,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "win32"
@@ -31868,7 +31862,10 @@
       "version": "0.7.5",
       "license": "MIT",
       "dependencies": {
+        "brotli-size": "^4.0.0",
+        "clean-css": "^5.3.3",
         "flow-api-translator": "0.19.2",
+        "terser": "^5.31.0",
         "yargs": "17.7.2"
       },
       "bin": {
@@ -36793,7 +36790,10 @@
     "@stylexjs/scripts": {
       "version": "file:packages/scripts",
       "requires": {
+        "brotli-size": "^4.0.0",
+        "clean-css": "^5.3.3",
         "flow-api-translator": "0.19.2",
+        "terser": "^5.31.0",
         "yargs": "17.7.2"
       }
     },
@@ -38333,6 +38333,21 @@
         "fill-range": "^7.0.1"
       }
     },
+    "brotli-size": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/brotli-size/-/brotli-size-4.0.0.tgz",
+      "integrity": "sha512-uA9fOtlTRC0iqKfzff1W34DXUA3GyVqbUaeo3Rw3d4gd1eavKVCETXrn3NzO74W+UVkG3UHu8WxUi+XvKI/huA==",
+      "requires": {
+        "duplexer": "0.1.1"
+      },
+      "dependencies": {
+        "duplexer": {
+          "version": "0.1.1",
+          "resolved": "https://registry.npmjs.org/duplexer/-/duplexer-0.1.1.tgz",
+          "integrity": "sha512-sxNZ+ljy+RA1maXoUReeqBBpBC6RLKmg5ewzV+x+mSETmWNoKdZN6vcQjpFROemza23hGFskJtFNoUWUaQ+R4Q=="
+        }
+      }
+    },
     "browserslist": {
       "version": "4.23.0",
       "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.23.0.tgz",
@@ -38540,9 +38555,9 @@
       "dev": true
     },
     "clean-css": {
-      "version": "5.3.1",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.1.tgz",
-      "integrity": "sha512-lCr8OHhiWCTw4v8POJovCoh4T7I9U11yVsPjMWWnnMmp9ZowCxyad1Pathle/9HjaDp+fdQKjO9fQydE6RHTZg==",
+      "version": "5.3.3",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.3.tgz",
+      "integrity": "sha512-D5J+kHaVb/wKSFcyyV75uCn8fiY4sV38XJoe4CUyGQ+mOU/fMVYUdH1hJC+CJQ5uY3EnW27SbJYS4X8BiLrAFg==",
       "requires": {
         "source-map": "~0.6.0"
       }
@@ -39469,15 +39484,6 @@
           "integrity": "sha512-M0JtH+hlOL5pLQwHOLNYZaXuhqmvS8oExsqB1SBYgA4Dk7u/xx+YdGHXaK5pyUfed5mYXdlYiphWq3G8cRi5JQ==",
           "dev": true
         },
-        "clean-css": {
-          "version": "5.3.2",
-          "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.2.tgz",
-          "integrity": "sha512-JVJbM+f3d3Q704rF4bqQ5UUyTtuJ0JRKNbTKVEeujCCBoMdkEi+V+e8oktO9qGQNSvHrFTM6JZRXrUvGR1czww==",
-          "dev": true,
-          "requires": {
-            "source-map": "~0.6.0"
-          }
-        },
         "debug": {
           "version": "3.2.7",
           "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.7.tgz",
@@ -52381,9 +52387,9 @@
       "version": "2.2.1"
     },
     "terser": {
-      "version": "5.19.2",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-5.19.2.tgz",
-      "integrity": "sha512-qC5+dmecKJA4cpYxRa5aVkKehYsQKc+AHeKl0Oe62aYjBL8ZA33tTljktDHJSaxxMnbI5ZYw+o/S2DxxLu8OfA==",
+      "version": "5.31.6",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-5.31.6.tgz",
+      "integrity": "sha512-PQ4DAriWzKj+qgehQ7LK5bQqCFNMmlhjR2PFFLuqGCpuCAauxemVBWwWOxo3UIwWQx8+Pr61Df++r76wDmkQBg==",
       "requires": {
         "@jridgewell/source-map": "^0.3.3",
         "acorn": "^8.8.2",
@@ -53869,6 +53875,60 @@
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/zwitch/-/zwitch-1.0.5.tgz",
       "integrity": "sha512-V50KMwwzqJV0NpZIZFwfOD5/lyny3WlSzRiXgA0G7VUnRlqttta1L6UQIHzd6EuBY/cHGfwTIck7w1yH6Q5zUw=="
+    },
+    "@next/swc-darwin-arm64": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-darwin-arm64/-/swc-darwin-arm64-14.0.1.tgz",
+      "integrity": "sha512-JyxnGCS4qT67hdOKQ0CkgFTp+PXub5W1wsGvIq98TNbF3YEIN7iDekYhYsZzc8Ov0pWEsghQt+tANdidITCLaw==",
+      "optional": true
+    },
+    "@next/swc-darwin-x64": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-darwin-x64/-/swc-darwin-x64-14.0.1.tgz",
+      "integrity": "sha512-625Z7bb5AyIzswF9hvfZWa+HTwFZw+Jn3lOBNZB87lUS0iuCYDHqk3ujuHCkiyPtSC0xFBtYDLcrZ11mF/ap3w==",
+      "optional": true
+    },
+    "@next/swc-linux-arm64-gnu": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-linux-arm64-gnu/-/swc-linux-arm64-gnu-14.0.1.tgz",
+      "integrity": "sha512-iVpn3KG3DprFXzVHM09kvb//4CNNXBQ9NB/pTm8LO+vnnnaObnzFdS5KM+w1okwa32xH0g8EvZIhoB3fI3mS1g==",
+      "optional": true
+    },
+    "@next/swc-linux-arm64-musl": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-linux-arm64-musl/-/swc-linux-arm64-musl-14.0.1.tgz",
+      "integrity": "sha512-mVsGyMxTLWZXyD5sen6kGOTYVOO67lZjLApIj/JsTEEohDDt1im2nkspzfV5MvhfS7diDw6Rp/xvAQaWZTv1Ww==",
+      "optional": true
+    },
+    "@next/swc-linux-x64-gnu": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-linux-x64-gnu/-/swc-linux-x64-gnu-14.0.1.tgz",
+      "integrity": "sha512-wMqf90uDWN001NqCM/auRl3+qVVeKfjJdT9XW+RMIOf+rhUzadmYJu++tp2y+hUbb6GTRhT+VjQzcgg/QTD9NQ==",
+      "optional": true
+    },
+    "@next/swc-linux-x64-musl": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-linux-x64-musl/-/swc-linux-x64-musl-14.0.1.tgz",
+      "integrity": "sha512-ol1X1e24w4j4QwdeNjfX0f+Nza25n+ymY0T2frTyalVczUmzkVD7QGgPTZMHfR1aLrO69hBs0G3QBYaj22J5GQ==",
+      "optional": true
+    },
+    "@next/swc-win32-arm64-msvc": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-win32-arm64-msvc/-/swc-win32-arm64-msvc-14.0.1.tgz",
+      "integrity": "sha512-WEmTEeWs6yRUEnUlahTgvZteh5RJc4sEjCQIodJlZZ5/VJwVP8p2L7l6VhzQhT4h7KvLx/Ed4UViBdne6zpIsw==",
+      "optional": true
+    },
+    "@next/swc-win32-ia32-msvc": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-win32-ia32-msvc/-/swc-win32-ia32-msvc-14.0.1.tgz",
+      "integrity": "sha512-oFpHphN4ygAgZUKjzga7SoH2VGbEJXZa/KL8bHCAwCjDWle6R1SpiGOdUdA8EJ9YsG1TYWpzY6FTbUA+iAJeww==",
+      "optional": true
+    },
+    "@next/swc-win32-x64-msvc": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-win32-x64-msvc/-/swc-win32-x64-msvc-14.0.1.tgz",
+      "integrity": "sha512-FFp3nOJ/5qSpeWT0BZQ+YE1pSMk4IMpkME/1DwKBwhg4mJLB9L+6EXuJi4JEwaJdl5iN+UUlmUD3IsR1kx5fAg==",
+      "optional": true
     }
   }
 }
diff --git a/packages/scripts/package.json b/packages/scripts/package.json
index c4ae06dc..1a38f818 100644
--- a/packages/scripts/package.json
+++ b/packages/scripts/package.json
@@ -7,8 +7,15 @@
     "gen-types": "./gen-types.js",
     "rewrite-imports": "./rewrite-imports.js"
   },
+  "scripts": {
+    "size": "./size.js",
+    "size:compare": "./size-compare.js"
+  },
   "dependencies": {
+    "brotli-size": "^4.0.0",
+    "clean-css": "^5.3.3",
     "flow-api-translator": "0.19.2",
+    "terser": "^5.31.0",
     "yargs": "17.7.2"
   }
 }
diff --git a/packages/scripts/size-compare.js b/packages/scripts/size-compare.js
new file mode 100755
index 00000000..1096b485
--- /dev/null
+++ b/packages/scripts/size-compare.js
@@ -0,0 +1,106 @@
+#!/usr/bin/env node
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ *
+ */
+
+'use strict';
+
+const fs = require('fs');
+
+function readJsonFile(filePath) {
+  try {
+    const fileContents = fs.readFileSync(filePath, 'utf8');
+    const data = JSON.parse(fileContents);
+    return data;
+  } catch (error) {
+    console.error(`Error reading file ${filePath}:`, error);
+    return null;
+  }
+}
+
+function mergeData(base, patch) {
+  const merged = {};
+  function addToMerged(data, fileIndex) {
+    Object.keys(data).forEach((key) => {
+      if (merged[key] == null) {
+        merged[key] = {};
+      }
+      Object.keys(data[key]).forEach((subKey) => {
+        if (merged[key][subKey] == null) {
+          merged[key][subKey] = {};
+        }
+        merged[key][subKey][fileIndex] = data[key][subKey];
+      });
+    });
+  }
+  if (base != null) {
+    addToMerged(base, 1);
+  }
+  if (patch != null) {
+    addToMerged(patch, 2);
+  }
+  return merged;
+}
+
+function generateComparisonData(results) {
+  const baseResult = parseInt(results[1], 10);
+  const patchResult = parseInt(results[2], 10);
+  const isValidBase = !isNaN(baseResult);
+  const isValidPatch = !isNaN(patchResult);
+  let icon = '',
+    ratioFixed = '';
+
+  if (isValidBase && isValidPatch) {
+    const ratio = patchResult / baseResult;
+    ratioFixed = ratio.toFixed(2);
+    if (ratio < 0.95 || ratio > 1.05) {
+      icon = '**!!**';
+    } else if (ratio < 1) {
+      icon = '-';
+    } else if (ratio > 1) {
+      icon = '+';
+    }
+  }
+
+  return {
+    baseResult: isValidBase ? baseResult.toLocaleString() : '',
+    patchResult: isValidPatch ? patchResult.toLocaleString() : '',
+    ratio: ratioFixed,
+    icon,
+  };
+}
+
+function generateMarkdownTable(mergedData) {
+  const rows = [];
+  rows.push('| **Results** | **Base** | **Patch** | **Ratio** |  |');
+  rows.push('| :--- | ---: | ---: | ---: | ---: |');
+  Object.keys(mergedData).forEach((suiteName) => {
+    rows.push('|  |  |  |  |');
+    rows.push(`| **${suiteName}** |  |  |  |  |`);
+    Object.keys(mergedData[suiteName]).forEach((test) => {
+      const results = mergedData[suiteName][test];
+      const { baseResult, patchResult, ratio, icon } =
+        generateComparisonData(results);
+      rows.push(
+        `| &middot; ${test} | ${baseResult} | ${patchResult} | ${ratio} | ${icon} |`,
+      );
+    });
+  });
+  return rows.join('\n');
+}
+
+/**
+ * Compare up to 2 different benchmark runs
+ */
+const args = process.argv.slice(2);
+const baseResults = args[0] ? readJsonFile(args[0]) : null;
+const patchResults = args[1] ? readJsonFile(args[1]) : null;
+const mergedData = mergeData(baseResults, patchResults);
+const markdownTable = generateMarkdownTable(mergedData);
+
+console.log(markdownTable);
diff --git a/packages/scripts/size.js b/packages/scripts/size.js
new file mode 100755
index 00000000..94a9dd8a
--- /dev/null
+++ b/packages/scripts/size.js
@@ -0,0 +1,90 @@
+#!/usr/bin/env node
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ *
+ */
+
+'use strict';
+
+const brotliSizePkg = require('brotli-size');
+const CleanCSS = require('clean-css');
+const fs = require('fs');
+const path = require('path');
+const { minify_sync } = require('terser');
+const yargs = require('yargs/yargs');
+const { hideBin } = require('yargs/helpers');
+
+const minifyCSS = new CleanCSS();
+
+function getSizes(files) {
+  const sizes = files.map((file) => {
+    const code = fs.readFileSync(file, 'utf8');
+    let result = '';
+    if (file.endsWith('.css')) {
+      result = minifyCSS.minify(code).styles;
+    }
+    if (file.endsWith('.js')) {
+      result = minify_sync(code).code;
+    }
+    const minified = Buffer.byteLength(result, 'utf8');
+    const compressed = brotliSizePkg.sync(result);
+    return { file, compressed, minified };
+  });
+  return sizes;
+}
+
+// run.js --outfile filename.js
+const argv = yargs(hideBin(process.argv)).option('outfile', {
+  alias: 'o',
+  type: 'string',
+  description: 'Output file',
+  demandOption: false,
+}).argv;
+const outfile = argv.outfile;
+
+const files = [
+  path.join(__dirname, '../stylex/lib/stylex.js'),
+  path.join(__dirname, '../stylex/lib/StyleXSheet.js'),
+  path.join(__dirname, '../../apps/rollup-example/.build/bundle.js'),
+  path.join(__dirname, '../../apps/rollup-example/.build/stylex.css'),
+];
+
+console.log('Running "size" benchmark, please wait...');
+
+const sizes = getSizes(files);
+
+const aggregatedResults = {};
+sizes.forEach((entry) => {
+  const { file, minified, compressed } = entry;
+  const filename = file.split('apps/')[1] || file.split('packages/')[1];
+  aggregatedResults[filename] = {
+    compressed,
+    minified,
+  };
+});
+
+const aggregatedResultsString = JSON.stringify(aggregatedResults, null, 2);
+
+// Print / Write results
+const now = new Date();
+const year = now.getFullYear();
+const month = String(now.getMonth() + 1).padStart(2, '0'); // Month is 0-indexed
+const day = String(now.getDate()).padStart(2, '0');
+const hours = String(now.getHours()).padStart(2, '0');
+const minutes = String(now.getMinutes()).padStart(2, '0');
+const timestamp = `${year}${month}${day}-${hours}${minutes}`;
+
+const dirpath = `${process.cwd()}/.logs`;
+const filepath = `${dirpath}/size-${timestamp}.json`;
+if (!fs.existsSync(dirpath)) {
+  fs.mkdirSync(dirpath);
+}
+const outpath = outfile || filepath;
+fs.writeFileSync(outpath, `${aggregatedResultsString}\n`);
+
+console.log(aggregatedResultsString);
+console.log('Results written to', outpath);