diff --git a/package-lock.json b/package-lock.json
index 5775c46ee..a328430b3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -53,7 +53,6 @@
         "vite": "^7.3.1",
         "vscode-jsonrpc": "^9.0.0",
         "vscode-languageserver-protocol": "^3.16.0",
-        "web-vitals": "^1.1.1",
         "xterm": "4.19.0",
         "xterm-addon-fit": "^0.5.0"
       },
@@ -13121,12 +13120,6 @@
         "node": ">=18"
       }
     },
-    "node_modules/web-vitals": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/web-vitals/-/web-vitals-1.1.2.tgz",
-      "integrity": "sha512-PFMKIY+bRSXlMxVAQ+m2aw9c/ioUYfDgrYot0YUa+/xa0sakubWhSDyxAKwzymvXVdF4CZI71g06W+mqhzu6ig==",
-      "license": "Apache-2.0"
-    },
     "node_modules/webidl-conversions": {
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-8.0.1.tgz",
diff --git a/package.json b/package.json
index 224118a10..11808c14e 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,6 @@
     "vite": "^7.3.1",
     "vscode-jsonrpc": "^9.0.0",
     "vscode-languageserver-protocol": "^3.16.0",
-    "web-vitals": "^1.1.1",
     "xterm": "4.19.0",
     "xterm-addon-fit": "^0.5.0"
   },
diff --git a/src/index.tsx b/src/index.tsx
index 2d826c830..644d8b364 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -10,7 +10,6 @@ import "./layers.css";
 import { StrictMode } from "react";
 import { createRoot } from "react-dom/client";
 import App from "./App";
-import reportWebVitals from "./reportWebVitals";
 import { registerSW } from "virtual:pwa-register";
 import { flags } from "./flags";
 import { baseUrl } from "./base";
@@ -70,8 +69,3 @@ root.render(
     <App />
   </StrictMode>
 );
-
-// If you want to start measuring performance in your app, pass a function
-// to log results (for example: reportWebVitals(console.log))
-// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
-reportWebVitals();
diff --git a/src/reportWebVitals.ts b/src/reportWebVitals.ts
deleted file mode 100644
index 5591aa395..000000000
--- a/src/reportWebVitals.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-/**
- * (c) 2021, Micro:bit Educational Foundation and contributors
- *
- * SPDX-License-Identifier: MIT
- */
-import { ReportHandler } from "web-vitals";
-
-const reportWebVitals = (onPerfEntry?: ReportHandler) => {
-  if (onPerfEntry && onPerfEntry instanceof Function) {
-    import("web-vitals").then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
-      getCLS(onPerfEntry);
-      getFID(onPerfEntry);
-      getFCP(onPerfEntry);
-      getLCP(onPerfEntry);
-      getTTFB(onPerfEntry);
-    });
-  }
-};
-
-export default reportWebVitals;