[Python-Dev] Reduce memory footprint of Python (original) (raw)
Benjamin Peterson benjamin at python.org
Sun Oct 6 17:41:23 CEST 2013
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2013/10/6 Victor Stinner <victor.stinner at gmail.com>:
Hi,
Slowly, I'm trying to see if it would be possible to reduce the memory footprint of Python using the tracemalloc module. First, I noticed that linecache can allocate more than 2 MB. What do you think of adding a registry of "clear cache" functions? For exemple, re.purge() and linecache.clearcache(). gc.collect() clears free lists. I don't know if gc.collect() should be related to this new registy (clear all caches) or not.
What is the usecase for minimizing the memory usage of Python in the middle of a program?
The dictionary of interned Unicode strings can be large: up to 1.5 MB (with +30,000 strings). Just the dictionary, excluding size of strings. Is the size normal or not? Using tracemalloc, this dictionary is usually to largest memory block.
1.5 MB is sort of a pittance.
unittest doesn't look to release memory (the TestCase class) after the execution of a test.
Is it important to optimize unittests for memory usage?
-- Regards, Benjamin
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