[issue37790] subprocess.Popen() is extremely slow

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

This issue lacks a lot of information:

* What is your operating system (name and version)? On Linux, what is your Linux kernel version?
* Which Python version did you try?
* Which command are you running?
* Do you use a shell?
* Do you use bytes (default) or Unicode (universal_newlines=True or text=True)?
* Can you provide a minimum reproducer? I don't know how to use msg349894: cmd is not defined.

Attached 1.py uses 2 commands, appararently both use a shell:

* "find /usr/bin -type f 2>/dev/null"
* "objdump '%s'"

"objdump '%s'" is unsafe and can lead to shell injection: try to avoid the usage of a shell. Use subprocess.Popen directly, or an helper which doesn't use shell=True.

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nosy: +vstinner

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37790>
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