News, Reviews & Betas which includes large community peer support Testing the new retpoline mitigation on AMD for Spectre v2 shows that the performance loss with the new patch is nowhere nearly as big as the performance impact incurred by Intel processors.
Recently, VUSec, the security group at VU Amsterdam, discovered a new BHI Spectre v2 vulnerability in Intel and ARM CPUs. With the mitigation patch put in place, it was found that even modern 11th Gen and 12th Gen Intel processors were losing a lot of performance with the new patch. Although AMD CPUs appear to be impervious to this new Spectre-BHB threat, the IPAS STORM security team over at Intel discovered that the LFENCE/JMP mitigation for Spectre v2 used in AMD CPUs wasn’t helping much.
