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© January 2004 Tony Lawrence

The idea behind hyperthreading is that different process threads may demand different processor resources. For example, one thread might make extensive use of floating point, while the other threads don't. To the extent that the threads are not conflicting, hyperthreading can increase performance by allowing operations to proceed in parallel. The processor can do a floating point operation for thread A at the same time it is doing something else for thread B.

https://en.wikipedia.org/wiki/Hyper-threading is a longer and more complete description for those who are interested.

Hyperthreading is not necessarily faster: if the same resources are being requested, it could even be slower.

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