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shabnam

What are some of the possible reasons that a core in this situation might be slower?

DunkMaster

Seem here, just curious why the cores right now cant be at least as fast as the original "fat" core?

nrchu

I think the concept here is that rather than one "fat" core, we can have two slightly slower cores for the for the same amount of "resources" (some kind of combination of manufacturing costs, time, energy expenditure etc). Thus we can see that even though 2 cores isn't necessarily 2x speedup, it's more efficient and gives better results than focusing our resources on a single fat core. I think this is readily obvious if you consider all modern CPUs which are multi core, companies of course will pursue whichever avenue is most profitable for them (less cost for same power).