Bisected: The Unfortunate Reason Linux 4.20 Is Running Slower

Dupe: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=18471448" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=18471448</a>

to save everyone the click on the dupes:<p>craftyguy 1 day ago | unvote [-]<p>tl;dr: The cause is the Single Thread Indirect Branch Predictors (STIBP) for cross-hyperthread Spectre mitigation on Intel processors.