SETI spots dozens of new mysterious signals emanating from distant galaxy

Re:SETI spots dozens of new mysterious signals emanating fro... by terryf on Thursday September 13, 2018 @04:26PM (#17982222)

Things would be a lot simpler if it were faster though :)

Consider a modern cpu running at 3ghz. It can retire some instructions on every cycle. Light can travel one mm in that time. That means the part of the core that decodes the incoming stream of insns is effectively outside the lightcone of the part that retires instructions.

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Re:SETI spots dozens of new mysterious signals emanating fro... by mjw1007 on Thursday September 13, 2018 @04:35PM (#17982301)

I make it 100mm, not 1mm.

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Re:SETI spots dozens of new mysterious signals emanating fro... by abdullahkhalids on Thursday September 13, 2018 @06:39PM (#17983332)

A related point is that we can't just make a single CPU do more computations per unit time by making the CPU bigger because the finite speed of electricity (which is upper bounded by the speed of light), determines the largest size of the CPU before the different paths that electricity takes through the CPU logic gates become out of sync.

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Re:SETI spots dozens of new mysterious signals emanating fro... by earenndil on Thursday September 13, 2018 @06:16PM (#17983168)

Then the speed of light is still not slow, cpus are just really fast. Point being, everything is relative, and lightspeed isn't necessarily the limiting factor.

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Re:SETI spots dozens of new mysterious signals emanating fro... by pizza on Thursday September 13, 2018 @06:27PM (#17983245)

c * (3 ghz)^-1 ~= 10 cm

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