Microsoft has begun updating its Windows operating systems against the Meltdown and Spectre vulnerabilities, but not all users will be too happy about it. According to the company, machines running Windows 7 and 8, as well as computers based on Haswell chips or older, will see “significant slowdowns” from the update. Intel’s own findings largely confirm Microsoft’s results.
From the earliest rumors, the performance decrease from Meltdown and Spectre ranged from negligible (2% or less) to significant (20% or more), on both Linux servers and Windows machines.
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Maybe these issues are observable when the CPU is under extreme load?
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