Attached Link: http://www.infoworld.com/article/05/04/21/17TCamd_2.html

"Until Intel delivers its dual-core Xeon, its competitive technology remains Hyper-Threading. Hyper-Threading is an ingenious stopgap that Intel developed to boost the performance of a narrow range of applications, namely those that do their background processing via lightweight threads instead of the coarse processes that dominate software design. Neither the CPU nor the OS prevents threads from attempting to access the same resource, which makes the sloppy use of threads one of the leading enemies of software stability. But even with applications that use many threads, Hyper-Threading delivers, even by Intel estimates, a maximum of about 30 percent improvement to an applications performance. And these benefits are limited only to heavily threaded applications; Hyper-Threading does not speed up the entire system. In fact, with most systems running a mix of threads and processes, Hyper-Threading can harm performance; a scan of Intels SPEC benchmarks reveals that Xeon system vendors often disable Hyper-Threading to improve Xeons results." I suspect that Poser's ancient code wouldn't be affected much one way or another.

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