This a potentially devastating bug on Intel CPUs, if true. Patches being worked on for Linux/Windows already. Rumors of up to 30% perf hits in some cases!! https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/ …
30% was quoted as a synthetic syscall heavy workload. Some published academic workarounds and patch methods give a 0.3% perf hit on average.
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Yeh, 30% is batshit ridiculously wrong.
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I'm sure in some specific workload it will happen. The trick is nuance: how do you characterize a bug fix that has a variable impact? Non-techies want a simple explanation to a complex matter. Meanwhile the public is weary of statistics being used to downplay bad things
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The fanboying on Reddit and other places from AMD ppl is insane about this. You will not magically be faster in single threaded work just because this patch *could* slow down Intel.
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