Sounds interesting from NetBSD's 10 release notes

From: Pedro Giffuni <pfg_at_freebsd.org>
Date: Sun, 31 Mar 2024 19:37:51 UTC
https://www.netbsd.org/releases/formal-10/NetBSD-10.0.html


   
   - Switched the kernel's file path lookup cache to use faster per-directory red-black trees.
...   
   - Improved the performance of tmpfs. Implemented lazy update of atime/mtime.