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Oj0

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  1. Not really. The 25M is so small that the amount of overhead needed to manage that many threads is significant compared to the amount of computation itself.

     

    In other words, you're not benchmarking how fast you can compute Pi, you're benchmarking how quickly you can create and synchronize threads. Some OS'es do better than others - namely Win8 and Win10 are better at this than Win7 or Linux.

     

    Thank you for pointing me in the right direction, I had at some high thread-count scores and I see that Windows 10 sits at around 60+ % efficiency while Windows 7 is generally a touch under 40 %,

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