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The Windows 1.0 clock (1988) had a 1Hz second sweep hand that ran on a 4.77MHz 8088. It's really just a couple clipped line segments each second.

http://variableghz.com/wp-content/uploads/2012/12/windows-1....

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Yes, that was the point I was making. This is something computationally trivial as long as the code is written appropriately.

Keep in mind though, that the performance optimization the Windows article talks about is how to reduce the working set in memory more than the CPU consumption.

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