cache the browser path to prevent dupes

Author: aitchiss

src/run-lighthouse.js

@@ -3,14 +3,21 @@ import lighthouse from 'lighthouse';
 import log from 'lighthouse-logger';
 import chromeLauncher from 'chrome-launcher';
 
+// Cache the browser path to avoid multiple launches
+let cachedBrowserPath;
+
 export const getBrowserPath = async () => {
+  if (cachedBrowserPath) {
+    return cachedBrowserPath;
+  }
+
   const browser = await puppeteer.launch({
     headless: 'new',
     args: ['--no-sandbox', '--disable-gpu', '--disable-dev-shm-usage'],
   });
-  const path = browser.process().spawnfile;
+  cachedBrowserPath = browser.process().spawnfile;
   await browser.close();
-  return path;
+  return cachedBrowserPath;
 };
 
 export const runLighthouse = async (browserPath, url, settings) => {