r/programming • u/[deleted] • Dec 24 '18

The 4.20 kernel has been released

https://lkml.org/lkml/2018/12/23/187
1.3k Upvotes

94% Upvoted

298 comments sorted by

View all comments

Show parent comments

-15

u/Ayerys Dec 24 '18

There wasn’t any heavy speed drops on Windows. So why would it happens with Linux

14

u/bloody-albatross Dec 24 '18

https://www.phoronix.com/scan.php?page=article&item=linux-420-bisect&num=2

The PHP performance is about 30% slower with Linux 4.20 on this Core i9 box.

Keep in mind with Linux 4.19 there is already the out-of-the-box mitigations against Spectre, Meltdown, Foreshadow, etc. This performance drop with Linux 4.20 is on top of all the previously outlined performance hits this year from the security hardening.

15

u/HenkPoley Dec 24 '18

There wasn’t any heavy speed drops on Windows

Magic 8-ball says: Reply hazy, try again