Hi,
I've noticed the subprocess performance issue with python 3. For example, this simple script takes just 0,15 second to complete with python 2.7, but more than 5 sec with python 3.6:import subprocess for i in range(100): p = subprocess.Popen(['uname', '-a'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT) (stdoutdata, stderrdata) = p.communicate() Profiling with the cProfile shows, that this excessive 5 seconds was wasted in the "{built-in method posix.read}" Could anybody confirm this issue?
I see this on HardenedBSD 12 with python2.7 (fast) and python3.6 and 3.7 (both slow) installed from packages. Interestingly, I don't see this on my FreeNAS 11.3, where python2.7 and 3.6 are both installed by default and run fast. Hope that helps, Konstantin
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