[issue11849] glibc allocator doesn't release all free()ed memory

[INADA Naoki]

INADA Naoki <songofacandy at gmail.com> added the comment:

FYI, jemalloc can reduce memory usage, especially when application
is multithreaded.

https://www.speedshop.co/2017/12/04/malloc-doubles-ruby-memory.html
https://zapier.com/engineering/celery-python-jemalloc/

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nosy: +inada.naoki

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