without patches that degrade performance Is it possible to compile a linux kerne

[xor]

without patches that degrade performance
Is it possible to compile a linux kernel

"Linux 5.x Kernel Performance Is Sliding In The Wrong Direction" https://www.phoronix.com/scan.php?page=article&item=linux-50-sliding&num=1

[Rich]

Hi xor
From the link you provided:

... All kernels were from the Ubuntu Mainline Kernel PPA and kept to their stock settings, ...

So a less misleading title would read:
"Ubuntus Linux 5.x Mainline Kernel Performance Is Sliding In The Wrong Direction"

In one of the comments (you did take the time to read those, right?) someone posted benchmarks of socket throughput and latency
of Ubuntu kernels versus those he configured himself (scroll down to see the results):
https://openbenchmarking.org/result/1902248-KH-TEST1982530
These results suggest it is an Ubuntu issue and that "Linux 5.x Kernel Performance Is Sliding In The Right Direction"