`updateMatch` 10s of times on navigation, causing slowdowns

[hadar759]

Which project does this relate to?

Router

Describe the bug

On navigation loadMatches runs twice, and inside it updateMatch runs 3 times for each route in the hierarchy of the navigated one. This causes updateMatch to run >50 times on a typical navigation in my app, slowing things down - especially when updateMatch itself is slow in some cases (for reasons unknown to me).

Your Example Website or App

https://stackblitz.com/edit/tanstack-router-updatematch

Steps to Reproduce the Bug or Issue

This is a reproduction of the route hierarchy in my app. I couldn't get the manual setup stages to persist upon refresh, so the following needs to be ran:

1. Let dev servers load
2. Run pnpm patch @tanstack/router-core --edit-dir 'pnpm-patches'
3. Edit pnpm-patches/dist/esm/router.js - add console.log('updateMatch', id); after line 791
4. Run pnpm patch-commit pnpm-patches. The console will complain that no changes were found, ignore it.
5. Run pnpm install && pnpm run dev
6. Click on links and navigation buttons, and see lots of updateMatch for each one in the console

Expected behavior

I expected updateMatch to run a lot less, and when it does to not take more than 1-2ms, it causes my app to completely freeze sometimes.

Screenshots or Videos

Video + screenshots from a Chrome devtools Performance tab recording, where calling navigate froze my app for 5 seconds on updateMatches which took 50ms-200ms each

https://github.com/user-attachments/assets/5b2983ae-1002-47e1-8d47-01eec49ee019

Platform

• OS: macOS Sequoia 15.5 (24F74)
• Browser: Arc browser Version 1.97.1 (63934), Chromium Engine Version 137.0.7151.69

Additional context

I'd be happy to provide more information as needed. Besides the issue of updateMatch executing so many times, I couldn't understand why sometimes it takes very long - especially since that's the only thing running according to the Performance tab.