A lot of CPU cores or fast cores?

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Has anybody done some tests with different CPUs regarding the size of L3 cache?

I’ve seen some mentions that Ruby is very demanding for memory. That could give a hint about possible impact of CPU cache size, because Discourse works with large datasets.

I’m deciding on new server and choosing the right CPU. I wonder whether to go with highest clock or take into account also L3 cache size..

Currently I’m looking at Intel® Xeon® E-2174G with 4 cores clocking 3,8GHz and 8MB cache. But there are more expensive options with 12MB or 16MB cache. Are they worth the money?

Thanks!