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There's more money to be made in performance and efficiency than security. If chipmakers could design and build the perfect processor, they would. But like anything else complex, there are compromises everywhere.

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Granted but the vendors accept these are serious problems given that they are immediately patched and the mitigation all enabled by default even at significant performance cost (most chip generations are down double digit perf % based versus "zero mitigations" at this int).

So they don't need to build the "perfect processor" but why aren't they discovering any of these issues themselves?

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