[issue11314] Subprocess suffers 40% process creation overhead penalty

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Benchmark under 3.x (without obsolete patch):
- fork + execv + waitpid: 4794.4 ms
- os.popen: 19792.9 ms
- subprocess.popen: 10152.1 ms

Benchmark under 2.x (without patch:)
- fork + execv + waitpid: 4292.7 ms
- os.popen: 12697.6 ms
- subprocess.popen: 5496.3 ms

Looks like there's a regression on both os.popen and subprocess.popen.

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<http://bugs.python.org/issue11314>
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