Nice article summarizing various benchmarks with HyperThreading turned on and off. Bottom line: it makes some stuff faster.

Given what they say about the 2.4.x scheduler being “naive” (basically, it’s not smart enough to know the difference between a “logical” CPU and a “physical” CPU in an SMP HT system), it would have been nice to see benchmarks from a multi-processor system, in addition to the UP system they used.

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