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by nv-vn 2872 days ago
2x core count hardly ever offers anywhere near a 100% performance gain, even across Intel's lineup [1]. Very few workloads are that parallelizeable, and almost everything (from the program to the OS to the CPU itself) introduces some form of overhead when running in parallel.

[1] https://www.cpubenchmark.net/compare/Intel-Core-i9-7960X-vs-...