When will single core performance be improved? why do they insist on multithreading?

when will single core performance be improved? why do they insist on multithreading?

will be end up with 1,000 core CPUs?

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No, 1024 cores

ayy

Significantly?
Never
The single core train is over.
Increasing throughput at this point requires exponential complexity. Clocks are near the limits allowed by physics.

also we're getting pretty close to hitting the end of moore's law

3-D gates will be the last card. until we knot the circuits as tightly as we can (think 3-D maze), there won't be much more shrinking to do.

Because it is very difficult

Just do less with your machine. Like stop using gui's. And do sequential tasks only so you won't be haunted by the benefits that multithreading would provide.

IBM has a 2000 core CPU.

Is there anything new on the materials science front that will allow single core to be great?

When we start using something other than silicon, which is never. But the big customers in future will be data collecting agencies handling large amount of data which can be massively parallel, so they need more cores rather than IPC. So the future will be more cores.