Apache, for example, can easily spawn more threads under Windows, and I've written code that uses 200 threads with excellent performance. Things seem to slow down around the 2,000 mark for some reason I'm not familiar with.
As far as I know, the default Windows thread stack size is 2 MB. Do the math :)
On NT4, beyond a couple of hundred threads a *heck* of a lot of time ends up being spent in the kernel doing context switches (and you can kiss even vaguely deterministic response times good-bye).
Using a more recent version of Windows improves matters significantly.
Cheers, Nick.
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Nick Coghlan | [EMAIL PROTECTED] | Brisbane, Australia
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http://boredomandlaziness.skystorm.net
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