My team has a python app that appears to perform 10+% better when the python source is present v.s. when only the pyc's are distributed. This is contradictory to my understanding of how python leverages pyc's.
Scenario 1. pyc-only install sees mediocre performance. (pyc's are built using compileall.py, then source .py's removed before packaging) 2. adding the .py files to the installed filesystem results in 10+% performance improvement 3. verified no difference in mod times, no new .pyc's generated 4. remove the .py's and again see drop in performance Env info: centos 6.5, x86_64, however python used is 32bit from the i686 repos (this is how we deal with some 32bit only c libraries that the app must use) Has anyone got an idea of what I might be running into? The app itself is a black box to me. I was not able to isolate this using a simple piece of python code that worked on a math problem for a discernible amount of time, so it could be something to do with how the app is using python. The app was originally written for python 2.4... Any suggestions on what I can try is appreciated.
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