core(tracehouse): fix OOM when computing attributable URLs (#16585)

connorjclark · web-flow · commit 6258254dcd24 · 2025-07-10T15:32:03.000-07:00
diff --git a/core/lib/tracehouse/main-thread-tasks.js b/core/lib/tracehouse/main-thread-tasks.js
@@ -515,8 +515,8 @@ class MainThreadTasks {
       if (!url) continue;
       // Add unique URLs to our overall tree.
       if (!allURLsInTree.includes(url)) allURLsInTree.push(url);
-      // Don't add consecutive, duplicate URLs
-      if (attributableURLs[attributableURLs.length - 1] === url) continue;
+      // Don't add duplicate URLs
+      if (attributableURLs.includes(url)) continue;
       attributableURLs.push(url);
     }
 
