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Here's Anandtech's recent SPEC benchmark deltas on hypertheading.

http://www.anandtech.com/show/11544/intel-skylake-ep-vs-amd-...




I see performance increases in every row there, so it must be beneficial in most cases.


comparing single threaded performance vs. two-threads-on-one-core will do that. here's a bunch of real-world tests (mostly gaming) showing HT hurting performance: https://www.techpowerup.com/forums/threads/gaming-benchmarks...




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