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Incident Response Readiness - Gerard Johansen - PSW #794

Security Weekly Podcast Network (Audio)

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The Trade Between Speed and Security

The fix for downfall, which has already been released by Intel, is microcode blocking speculative forwarding from gather. Gather's one of those functions in the code on the CPU that does that. So how much does that slow it down? Zero to 50% depending on the workload, according to Intel. But if you're doing something like crypto currency crunching or something like that, where you're just doing the same things over and over again, it gets a lot of prediction on that.

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