The models take forever to read multiple files attached to a prompt now

I’m struggling to understand why the new version reads files like this and so slowly? It’s obviously the way [name of competitor] does it but part of the reason I switched back to cursor was that it takes like 1/10th of the time to read the files I attach to a prompt or when I use chat with codebase. Now with the update it’s slow as ■■■■. What’s the deal with this, I don’t get it?