System calls have become more expensive with Meltdown. How to avoid them?

Too Long; Didn't Read

Surely you’ve heard of Meltdown by now. It’s a hardware vulnerability that allows an unauthorized process access to privileged memory. It affects Intel processors produced since 1995. Here are some details: <a href="https://en.wikipedia.org/wiki/Meltdown_%28security_vulnerability%29" target="_blank">https://en.wikipedia.org/…/Meltdown_(security_vulnerability)</a>