Initial Benchmarks Of The Spectre "SWAPGS" Mitigation Performance Impact
Written by Michael Larabel in Software on 7 August 2019. Page 4 of 4. 22 Comments

In the other common benchmarks tested, the SWAPGS performance impact tended to be 1% or less at least for this latest generation Intel Core i9 9900K desktop. Additional tests are currently being conducted on more hardware and more benchmarks. At least as it stands now it seems to be largely a 1% or less performance hit (with select exceptions at ~5%), so not nearly as bad as the other Spectre/Meltdown/Foreshadow/Zombieload mitigations, but this is on top of all that we've seen since January 2018.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.


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