[issue1663329] subprocess/popen close_fds perform poor if SC_OPEN_MAX is hi

[sorin]

sorin <sorin.sbarnea at gmail.com> added the comment:

Am I wrong or we should reopen this bug. Try `ulimit -n unlimited` and you'll make python code that does popen practically blocking.

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nosy: +sorin
type:  -> performance

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<http://bugs.python.org/issue1663329>
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