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Code that works correctly on that particular programmer's x86 machine, you mean. "Works great on my PC at home and at work" does not necessary imply "Works great on the 64 CPU production machine in the datacenter".

This stuff is terrifying.

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All the more reason to do our best to organize and share correct information about it.

Yes and at least the article makes it pretty clear just how complicated and subtle the issues are.

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