[issue28708] Low FD_SETSIZE limit on Windows

[Steve Dower]

Steve Dower <steve.dower at python.org> added the comment:

> So it's really FD_SETSIZE that matters, and it's a compile-time constant.

The only way this constant can matter is if the array has to end with an empty slot, which doesn't appear to be the case. The pre-compiled function can't tell how you compiled the code calling it, and the only place where FD_SETSIZE is used is in the macros to set them.

Dynamic allocation ought to be just fine, and likely faster for big arrays.

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<https://bugs.python.org/issue28708>
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