From https://Phoronix.com, a recent posting showed performance regression with NGINX.
TL;DR: Linux kernel 6.15 showed a substantial hit on NGINX performance.
This immediately made its way to the Linux kernel mailing list, and a patch exists which the author confirms has fixed this issue.
Many thanks to Michael Larabel for finding this and getting it up to the kernel folks.
NGINX thrives on performance, stability, innovation and security. It’s great that this could be found before it hits performance widely.