cli: throw error if running x64 node on mac arm64 (GoogleChrome#14288)

cli/run.js

@@ -7,6 +7,7 @@
 /* eslint-disable no-console */
 
 import path from 'path';
+import os from 'os';
 
 import psList from 'ps-list';
 import * as ChromeLauncher from 'chrome-launcher';
@@ -70,6 +71,18 @@ function parseChromeFlags(flags = '') {
  * @return {Promise<ChromeLauncher.LaunchedChrome>}
  */
 function getDebuggableChrome(flags) {
+  if (process.platform === 'darwin' && process.arch === 'x64') {
+    const cpus = os.cpus();
+    if (cpus[0].model.includes('Apple')) {
+      throw new Error(
+        'Launching Chrome on Mac Silicon (arm64) from an x64 Node installation results in ' +
+        'Rosetta translating the Chrome binary, even if Chrome is already arm64. This would ' +
+        'result in huge performance issues. To resolve this, you must run Lighthouse CLI with ' +
+        'a version of Node built for arm64. You should also confirm that your Chrome install ' +
+        'says arm64 in chrome://version');
+    }
+  }
+
   return ChromeLauncher.launch({
     port: flags.port,
     ignoreDefaultFlags: flags.chromeIgnoreDefaultFlags,